Porsche 944: Common Problems, Repair Costs & Specs

Written by Zach, an independent mechanic in the Pacific Northwest. Last reviewed September 2026. Spot a mistake? Tell me.

Common Issues

What goes wrong on the 944, how to spot it, and what it costs to fix.

Timing Belt and Balance Shaft Belt Failure

Advanced

Symptoms: Engine won't start, catastrophic engine noise, bent valves, snapped belt visible through timing cover inspection hole

Every 944 runs a timing belt and a balance shaft belt, and the engine is an interference design. If either belt lets go, the valves hit the pistons and you're rebuilding the engine. Replace both belts, the rollers, and the water pump every 30,000 miles or four years, and set the tension with the proper gauge.

Estimated Repair Costs

DIY $200–400

Shop $700–1,200

Both belts, every time.

Common Fixes

Replace both timing belt and balance shaft belt every 30,000 miles or 4 years
Replace timing belt tensioner and rollers
Replace water pump (driven by timing belt)
Replace all timing belt area seals
Use only high-quality belts (oem, Gates, Continental)
Never buy a 944 without documented timing belt history

Common Parts

Part	Part Number	Typical price
Timing Belt	944.105.025.04	$50–80
Balance Shaft Belt	944.105.024.04	$40–70
Tensioner Roller	944.105.233.00	$60–120
Water Pump	944.106.011.04	$80–150

Sources: Rennlist, Pelican Parts

Water Pump Failure

Advanced

Symptoms: Coolant leak at front of engine, overheating, squealing noise from engine, play in water pump shaft

The water pump sits behind the timing covers and is driven by the timing belt. When its bearing or seal fails, coolant can leak onto the belt and weaken it, which is exactly what you don't want on an interference engine. Always replace it with the belts.

Estimated Repair Costs

DIY $150–300

Shop $500–900

Always do it with the belts.

Common Fixes

Always replace water pump with timing belt service
Use oem or quality metal-impeller pump
Replace thermostat at the same time
If pump failed between services, inspect timing belt for contamination
Pressure test cooling system after repair

Common Parts

Part	Part Number	Typical price
Water Pump	944.106.011.04	$80–150
Thermostat	944.106.127.02	$30–50

Sources: Pelican Parts, Rennlist

DME Relay Failure

Moderate

Symptoms: No-start condition, fuel pump doesn't prime, car dies while driving and won't restart, intermittent starting issues

The DME relay powers the fuel pump, injectors, and engine computer, and its internal solder joints crack from heat cycling. When it fails the car cranks and won't start, or cuts out on the road. It's the classic 944 failure, and a spare in the glovebox turns a tow into a five-minute fix.

Estimated Repair Costs

DIY $30–80

Shop $100–200

Carry a spare.

Common Fixes

Replace DME relay with new oem unit
Avoid cheap aftermarket relays
Some owners re-solder the original relay as temporary fix
Carry a spare relay in the glove box
Clean relay socket contacts while relay is out

Common Parts

Part	Part Number	Typical price
DME Relay	928.615.301.20	$30–60

Sources: Rennlist, 944Online

Clutch Hydraulic System Failure

Advanced

Symptoms: Clutch pedal goes to floor, soft or spongy pedal, difficulty shifting, clutch won't disengage, fluid leak

The clutch is hydraulic, with a master cylinder at the pedal and a slave at the transaxle. The rubber seals in both age and leak, so the pedal goes soft or sinks to the floor. Replace both cylinders together and flush the fluid.

Estimated Repair Costs

DIY $100–200

Shop $300–600

Replace the master and slave together.

Common Fixes

Replace clutch master cylinder
Replace clutch slave cylinder
Replace clutch hydraulic line if deteriorated
Bleed system thoroughly (use pressure bleeder for best results)
Use dot 4 brake fluid

Common Parts

Part	Part Number	Typical price
Clutch Master Cylinder	944.231.711.00	$80–150
Clutch Slave Cylinder	944.116.231.00	$60–120

Sources: Pelican Parts, Rennlist

Torque Tube Bearing Wear

Advanced

Symptoms: Vibration at certain speeds, humming or growling noise from center of car, vibration when accelerating or decelerating

A torque tube connects the engine at the front to the transaxle at the back, with the driveshaft spinning inside it on bearings. As those bearings wear they whine and cause vibration. It's usually sorted when the torque tube comes out for a clutch job.

Estimated Repair Costs

DIY $200–400

Shop $600–1,200

Worn bearings whine and vibrate. Often done with the clutch.

Common Fixes

Replace torque tube center support bearing
Inspect CV joints at both ends of the driveshaft
Inspect the drivetrain couplings for cracked rubber
Replace rear CV joint if worn
Have torque tube serviced by specialist if unfamiliar

Common Parts

Part	Part Number	Typical price
Center Support Bearing	944.332.319.00	$80–150
Flex Disc (Guibo)	944.332.219.00	$60–120

Sources: Rennlist, 944Online

Dashboard Cracking

Easy

Symptoms: Cracks appearing on dashboard surface, especially on top near windshield, warping, deteriorating texture

Almost every 944 dash is cracked or will be. The vinyl over the foam shrinks in the sun and splits, worst in hot climates. A cap covers it cheaply; a proper recover or a good used dash fixes it for real.

Estimated Repair Costs

DIY $100–300

Shop $300–800

Cap it, recover it, or find a good used one.

Common Fixes

Dashboard cover or cap (covers damage but changes appearance)
Professional dashboard restoration
Replacement with used dashboard
Custom dashboard replacement panels
Prevention: always use sunshade when parked

Common Parts

Part	Part Number	Typical price
Dashboard Cover	Varies	$80–200
Dashboard (Used)	Varies	$200–500

Sources: Rennlist, 944Online

Power Steering Rack Leaks

Moderate

Symptoms: Power steering fluid leak, low fluid in reservoir, heavy steering when cold, whining from power steering pump

The power steering rack leaks from its pinion seal and tie rod boots as the seals age, and the pressure lines weep at their fittings. The pump wears too. Catch leaks early, before the rack runs low and wears itself out.

Estimated Repair Costs

DIY $150–300

Shop $400–800

Rack seals and the pump are the common failures.

Common Fixes

Rebuild steering rack with new seals
Replace steering rack with rebuilt or new unit
Replace power steering lines if leaking
Replace power steering pump if damaged
Replace tie rod ends while rack is out

Common Parts

Part	Part Number	Typical price
Steering Rack Seal Kit	Varies	$60–120
Power Steering Pump	Varies	$200–400

Sources: Pelican Parts, Rennlist

Odometer and Speedometer Gear Failure

Easy

Symptoms: Odometer stops working while speedometer works, intermittent odometer, trip meter stuck

The odometer is driven by small plastic gears in the cluster, and they crack or strip with age. The speedometer keeps working while the odometer stops. Brass replacement gears fix it permanently.

Estimated Repair Costs

DIY $30–80

Shop $150–300

Brass gear kits fix it for good.

Common Fixes

Replace odometer gears with aftermarket repair kit (brass gears available)
Have instrument cluster professionally rebuilt
Replace entire cluster with functional used unit
This is a common diy repair with proper instructions

Common Parts

Part	Part Number	Typical price
Odometer Gear Kit (Brass)	Varies	$20–40

Sources: Rennlist, Pelican Parts

Engine Mount Deterioration

Moderate

Symptoms: Excessive engine vibration, engine moves visibly during acceleration/deceleration, clunking when shifting

The engine mounts are rubber, and some are fluid-filled, and they sag and split with age. The engine then moves around, and you feel it as vibration at idle and a clunk when you get on and off the throttle. Replace them as a set.

Estimated Repair Costs

DIY $100–200

Shop $250–500

Replace as a set.

Common Fixes

Replace engine mounts with oem rubber mounts
Consider polyurethane mounts for performance use
Replace transaxle mounts at the same time
Check and replace torque tube mounts if worn

Common Parts

Part	Part Number	Typical price
Engine Mount Set	944.375.049.00	$80–150

Sources: Rennlist, 944Online

Restoration Guides

The bigger jobs: step-by-step, with parts lists, tools, and the mistakes to avoid.

Complete Suspension Refresh

Intermediate 12-16 hours $600-1,500

Struts, control arm bushings, tie rod ends, and the rear torsion bar components. The 944's handling is its best feature, so keep it sharp.

Interval Every 60,000-80,000 miles or when handling degrades

Cost (DIY) $600-1,500

Labor 10-14 hours shop time

Parts List

Part	OEM part #	Aftermarket	Typical cost
Front Strut (Each)	94434301503	Bilstein B4, Koni, KYB	$120-250
Rear Shock Absorber (Each)	94433030103	Bilstein B4, Koni	$100-200
Front Control Arm Bushing Set	94434199102	URO, Lemforder	$70-140
Front Strut Mount (Each)	94434302701	URO, aftermarket	$50-100
Front Ball Joint (Each)	94434153202	Lemforder, Meyle	$45-90
Tie Rod End (Each)	94434703302	Lemforder, Meyle	$35-70
Rear Trailing Arm Bushing Set	94433114103	URO, aftermarket	$60-120
Sway Bar End Link (Front, Each)	94434306902	URO, aftermarket	$30-60
Rear Torsion Bar Bearing	94433110901	Aftermarket available	$50-100
Wheel Bearing Kit (If needed)	Various	FAG, SKF	$60-120

Tools

Floor jack and jack stands
19mm socket for lug bolts
17mm, 18mm, 19mm, 21mm sockets and wrenches
Pickle fork or ball joint separator
Spring compressor
Torque wrench (ft-lbs range)
Bushing press or hydraulic press
Penetrating oil (PB Blaster)
Alignment tool set (optional)
Breaker bar for stubborn fasteners

Step by step

Raise vehicle and support securely on jack stands under reinforced jacking points.
Remove all four wheels and set aside.
Document current ride height and alignment settings if possible.
Begin with front suspension—disconnect sway bar end links (18mm).
Remove tie rod end from steering knuckle using pickle fork.
Remove ball joint from control arm or knuckle.
Support the strut assembly before removing top mount bolts.
From inside the engine bay, remove the three strut top mount nuts.
Lower and remove the strut assembly from the vehicle.
Use spring compressor to safely compress the coil spring.
Remove strut top mount nut and disassemble strut.
Install new strut cartridge, mount, and bearing as needed.
Reassemble and carefully release spring compressor.
For front control arms, press out old bushings using hydraulic press.
Press in new bushings, ensuring proper orientation.
For rear suspension, remove trailing arm mounting bolts.
The 944 uses rear torsion bars—note the index marks for reassembly.
Replace trailing arm bushings using press.
Replace rear shock absorbers—accessible from wheel well.
Reassemble everything in reverse order.
Front control arm lock nut: 48 ft-lbs (65 Nm).
Tie rod ends: 33 ft-lbs (45 Nm) with new cotter pins.
Rear trailing arm to axle strut: 66 ft-lbs (90 Nm).
Install wheels and torque lug bolts to 96 ft-lbs (130 Nm).
Perform wheel alignment after completing all work.

Tips

The 944 suspension is well-designed and responds well to fresh components.
Bilstein B4s are excellent oem-equivalent replacement shocks.
Note the torsion bar index marks before disassembly—you need them to get the ride height back.
Consider polyurethane bushings for more responsive handling.
The 944 Turbo and S2 have slightly different suspension—verify parts.
Check wheel bearings while suspension is apart—common wear items.
Koni adjustable shocks allow fine-tuning of handling characteristics.

Watch out

Spring compressors are dangerous—ensure they're properly rated and secured.
Torsion bars are under tension—improper handling can cause injury.
The 944 is relatively light (2,800-3,000 lbs) but use appropriate jack stands.
Some fasteners may be corroded—use penetrating oil and patience.
Always tighten suspension fasteners with weight on wheels for proper loading.

References

Rust Prevention and Repair

Intermediate to Advanced 8-40+ hours depending on severity $200-2,500+

Door bottoms, rockers, floors, and the rear hatch area. Galvanized, but not rustproof.

Interval Annual inspection, repair as needed

Cost (DIY) $200-2,500+

Labor Varies significantly by extent of rust

Parts List

Part	OEM part #	Aftermarket	Typical cost
Rocker Panel (Left)	94450349100	Restoration Design, aftermarket	$300-600
Rocker Panel (Right)	94450349200	Restoration Design, aftermarket	$300-600
Floor Pan Repair Section	Various	Klokkerholm, aftermarket	$150-350
Door Bottom Repair Panel	Various	Aftermarket fabrication	$80-200
Rear Hatch Seal Area Patch	Various	Fabricated	$100-250
Battery Tray	94461213100	Fabricated	$80-180
POR-15 Rust Preventive Coating	N/A	POR-15	$40-80
3M Underseal Rubberized Coating	N/A	3M	$15-25
Weld-Through Primer	N/A	Eastwood, 3M	$15-30
Body Seam Sealer	N/A	3M, Eastwood	$20-40

Tools

Wire brush and wire wheel attachments
Angle grinder with cutting and grinding discs
MIG welder (minimum 140A recommended)
Body panel clamps and magnets
Aviation snips for sheet metal
Sandblaster or chemical rust remover
Seam sealer applicator gun
Body filler and spreaders
DA sander with various grit discs
Spray gun for primer and underseal
Safety equipment: welding helmet, gloves, respirator

Step by step

Thoroughly clean undercarriage with pressure washer to expose rust areas.
Raise vehicle and inspect all common rust locations systematically.
The 944 has galvanized body panels but rust still develops at damage points.
Check door bottoms by opening doors and looking at lower edges.
Inspect rocker panels—press firmly to detect hidden internal rust.
Examine floor pans from inside with carpet removed and from below.
Check rear hatch seal area for moisture damage and rust.
Inspect battery tray area for acid damage.
Check around sunroof drains and A-pillars if sunroof equipped.
Examine wheel wells for stone damage that breaks galvanizing.
For surface rust: sand to bare metal, treat with rust converter, prime and seal.
For perforation rust: cut out affected area 1 inch beyond visible rust.
The galvanized steel requires thorough cleaning before welding.
Fabricate or purchase repair panels to fit openings.
Apply weld-through primer to mating surfaces.
Tack weld panels in place, checking fit frequently.
Finish weld using stitch welding to prevent warpage.
Grind welds smooth and apply seam sealer to all joints.
Treat interior surfaces with rust preventive (por-15 or equivalent).
Apply rubberized underseal to exterior underbody surfaces.
Prime and paint repaired areas to match existing finish.
Apply cavity wax to all hollow sections for ongoing protection.

Tips

The 944 has galvanized body panels—better than the 924 but still ages.
Door bottoms are the most common rust area—check drain holes regularly.
Clear all drain holes in doors, rockers, and sunroof drains.
Stone chips in wheel wells break galvanizing and start rust.
Reproduction panels are available but quality varies.
The 944's value is increasing—quality repairs are worthwhile.
Cars from salt-road areas require extra diligence.

Watch out

Welding galvanized metal produces toxic zinc fumes—excellent ventilation required.
Extensive rust repair can exceed the vehicle's value on some cars.
Welding near fuel lines and tank requires proper safety precautions.
Improper structural repairs can affect crash safety.
Rust preventive coatings require proper ventilation and safety equipment.
Disconnect battery before any welding operations.

References

Electrical System Restoration

Intermediate 4-16 hours depending on scope $100-600

The DME relay, grounds, the cluster, and the harness. When a 944 won't start, look here first.

Interval Inspect every 2-3 years, service as needed

Cost (DIY) $100-600

Labor 4-12 hours shop time

Parts List

Part	OEM part #	Aftermarket	Typical cost
DME Relay	92861530120	Bosch replacement	$30-60
Fuel Pump Relay	94461530100	Bosch	$30-60
Combination Relay	Various	Bosch, aftermarket	$40-80
Ignition Switch	94461310501	Aftermarket	$70-140
Ground Wire Kit	Various	Custom fabrication	$40-100
Alternator (Rebuilt)	94460301502	Bosch rebuilt	$180-350
Starter Motor (Rebuilt)	94460401502	Bosch rebuilt	$150-300
Battery Cable Set	Various	Custom fabrication	$70-140
Odometer Gear Kit (Brass)	N/A	Various	$20-40
Spark Plug Wire Set	Various	Bosch, NGK	$60-120

Tools

Digital multimeter
12V test light
Wire crimping tool set
Soldering iron and electronics solder
Heat shrink tubing assortment
Dielectric grease
Battery terminal cleaner
Small picks and probes for connectors
Wire strippers
Electrical contact cleaner
Torx and Phillips screwdrivers

Step by step

Disconnect battery before any electrical work—negative terminal first.
Test battery condition—load test and check voltage (should be 12.6V resting).
Clean and tighten all battery connections with terminal cleaner.
Test alternator output—should be 13.8-14.4V at idle.
Locate the central electric panel under the driver's side dash.
The DME relay is the #1 cause of no-start on 944s—test or replace.
DME relay is typically in position XI on the relay board.
Test fuel pump relay—listen for pump prime when key turns on.
Check and clean all ground connections throughout the vehicle.
Main engine ground is on the transmission—clean and retorque.
Body grounds should be cleaned to bare metal and protected.
Inspect wiring harness for heat damage near exhaust.
Check wiring insulation for brittleness and cracking.
For gauge cluster issues, remove cluster and inspect circuit board.
Repair cold solder joints with fresh solder.
Replace odometer gears with brass upgrade kit if odometer stuck.
Test ignition switch if experiencing intermittent starting.
Inspect and replace spark plug wires if cracked or corroded.
Test all lighting circuits—replace failed bulbs.
Inspect and clean all multi-pin connectors.
Apply dielectric grease to all cleaned connections.
Reconnect battery and test all systems.

Tips

The DME relay fails without warning. Keep a spare in the glovebox.
Re-soldering the DME relay is a common roadside repair—learn the technique.
Ground connections deteriorate and cause many strange electrical issues.
The odometer gear failure is extremely common—brass upgrade lasts.
Heat damage to wiring is common near the exhaust manifold.
The 944 Turbo has additional boost control electronics to check.
Document any wiring changes with photographs for future reference.

Watch out

Always disconnect battery before working on electrical systems.
The 944 does not have airbags but always exercise caution.
Incorrect relay replacement can damage the DME computer.
Brittle wiring can crack when handled—be gentle with harnesses.
Do not use excessive dielectric grease—it can attract dirt.
Fuel system electrical work requires fire safety precautions.

References

Interior Restoration

Intermediate 14-36 hours for complete restoration $500-2,500+

The cracking dashboard, seats, carpet, and door panels. The dash is the big one, and there are a few ways to fix it.

Interval As needed based on condition

Cost (DIY) $500-2,500+

Labor 12-28 hours shop time

Parts List

Part	OEM part #	Aftermarket	Typical cost
Dashboard Cover/Cap	N/A	Various aftermarket	$80-200
Dashboard (Used, Uncracked)	Various by year	N/A—used only	$200-500
Seat Cover Kit (Per Seat)	Various by color	Leatherique, aftermarket	$250-600
Carpet Set	Various by color	Autoloc, aftermarket	$300-600
Door Panel Set	Various	Used or refurbished	$200-500
Seat Foam Cushion	Various	Various	$100-250
Door Seal Kit (Complete)	Various	Aftermarket suppliers	$200-450
Shift Boot	94442404902	Aftermarket leather	$40-90
E-Brake Boot	94442404502	Aftermarket leather	$30-60
Sun Visor Set	Various	Used or refurbished	$80-180

Tools

Trim panel removal tools (plastic pry bars)
Phillips and flathead screwdrivers
Torx driver set (T20, T25)
Hog ring pliers and hog rings
Heat gun for vinyl work
Upholstery cleaning brushes
Interior detailing brushes
Spray bottle for cleaning solutions
Seam roller for carpet installation
Steam cleaner (optional but helpful)
Upholstery adhesive

Step by step

Remove seats by unbolting from floor (4 bolts per seat).
Disconnect electrical connectors if equipped with power seats.
Inspect seat fabric/leather/vinyl condition—clean thoroughly first.
For worn seats: recover with new material or install seat covers.
Many 944s have cloth seats that can be cleaned and protected.
Remove hog rings to separate covers from foam if recovering.
Replace foam cushions if compressed or deteriorated.
Install new covers using hog rings at attachment points.
Remove door panels by removing screws and popping plastic clips.
Door panel clips are very fragile—have spares ready.
Clean or replace door panel fabric/vinyl as needed.
Remove old carpet by removing sill plates, console, and seat bases.
Clean floor pan and treat any bare metal with rust preventive.
Install new carpet kit, starting from rear and working forward.
Address the dashboard: This is the 944's Achilles heel.
If dashboard is cracked, options include: cover/cap, used replacement, or living with it.
Dashboard covers fit over existing cracked dashboard.
Used uncracked dashboards are valuable and getting scarce.
Dashboard removal is major surgery—requires full disassembly.
If keeping original, protect from sun with quality dashboard mat.
Replace shift and e-brake boots if cracked or worn.
Reassemble all interior components.

Tips

The 944 dashboard cracks are famous—every 944 will eventually crack if exposed to sun.
Prevention is key: use a quality sunshade and park in shade when possible.
Dashboard covers are a practical solution and available in matching colors.
Good used dashboards are becoming rare and expensive—preserve what you have.
Door panel clips are extremely fragile—order extras before starting.
Many 944s have cloth seats—these can be steam cleaned effectively.
Consider Dynamat or similar sound deadening while carpet is out.
The 944 interior is comfortable and well-designed—worth restoring.

Watch out

Dashboard removal is extremely labor intensive—consider carefully.
Cracked dashboard can off-gas and damage windshield interior surface.
Fabric/leather dyes can stain surrounding surfaces—mask carefully.
Silicone-based products leave residue that interferes with future repairs.
Heat gun can damage vinyl if held too close—keep moving.
Door panel clips will break—don't start without spares on hand.

References

Timing and Balance Shaft Belt Replacement

Advanced 6-10 hours $300-600

The single most important job on a 944. There are two belts, the engine is an interference design, and tension matters as much as the belts themselves. Do the water pump and rollers at the same time.

Cost (DIY) $300-600

Parts List

Part	OEM part #	Aftermarket	Typical cost
Timing belt	—	Contitech, Gates	$40-80
Balance shaft belt	—	Contitech, Gates	$25-50
Tensioner rollers and idler	—	—	$80-200
Water pump	—	—	$100-250
Cam, balance shaft, and crank seals	—	—	$30-60

Tools

Belt tension gauge (Porsche 9201 or a known-good equivalent)
Crank holding tool
Metric sockets and wrenches
Torque wrench
Drain pan

Step by step

Disconnect the battery and drain the coolant.
Remove the accessory belts, the crank pulley, and the timing covers.
Set the engine to TDC on cylinder 1 and confirm the cam and balance shaft marks.
Loosen the tensioners and remove both belts.
Replace the water pump, rollers, and tensioners, and any weeping seals.
Fit the timing belt first with the marks aligned, then the balance shaft belt with its marks aligned.
Set tension on both belts with the gauge per the workshop manual.
Rotate the engine two full turns by hand, recheck all marks, and recheck tension.
Reassemble, refill, and bleed the cooling system.
Recheck timing belt tension after about 1,500 miles. New belts stretch.

Tips

Most 944 belt failures come from wrong tension, not old belts.
Replace every 30,000 miles or four years, whichever comes first.

Watch out

A misaligned balance shaft belt makes the engine shake. Recheck the marks if it runs rough.
Never turn the engine backward with the belts fitted.

References

DIY Maintenance

The routine work you can do on a Saturday with hand tools and jack stands.

Oil Change

Easy 30 min $40-60

Oil and filter on every 944 engine.

Interval Every 3,000-5,000 miles

Cost (DIY) $40-60

Tools

19mm socket for drain plug
Oil filter wrench (cap style)
Drain pan
Funnel
Ramps or jack and jack stands

Step by step

Warm the engine for 2-3 minutes to thin the oil.
Drive onto ramps or raise and support the car safely.
Locate the oil drain plug on the rear of the oil pan.
Position drain pan and remove the 19mm drain plug.
Allow oil to drain completely - 10 minutes minimum.
The spin-on oil filter is located on the passenger side of the engine.
Using the oil filter wrench, remove the old filter.
Apply a thin film of fresh oil to the new filter's rubber gasket.
Thread new filter on by hand until gasket contacts, then tighten 3/4 turn more.
Replace the crush washer on the drain plug.
Reinstall drain plug and torque to 22 ft-lbs (30 Nm).
Add 6.5 quarts (NA) or 7 quarts (Turbo) of 15W-40 or 20W-50 oil.
Start engine and check for leaks at drain and filter.
Shut off, wait 2 minutes, check level, and top off as needed.

Tips

The 944 takes 6.5-7 quarts depending on model and oil cooler configuration.
High-zinc oils (15W-40 diesel-rated) are recommended for the flat-tappet cam.
Turbo models should use quality synthetic in hot climates.

DME Relay Replacement

Easy 15 min $30-60

When the DME relay fails, the car cranks but won't start, usually far from home. Fifteen minutes to replace, so carry a spare.

Interval Every 10 years or as needed

Cost (DIY) $30-60

Tools

Small flathead screwdriver
Flashlight
New DME relay

Step by step

The DME relay is located in the central electric panel under the dash, driver's side.
Remove the lower dash panel to access the fuse/relay panel.
Locate the DME relay—it's typically in position XI (11) on the relay board.
The DME relay is the larger relay that controls fuel pump and DME power.
Note the orientation of the relay before removing.
Gently pull the old relay straight out of its socket.
Inspect the relay socket contacts for corrosion—clean if needed.
Push the new relay firmly into the socket in the correct orientation.
Turn key to ON and listen for fuel pump prime (2-3 seconds of pump noise).
Start engine and verify it runs properly.
Reinstall dash panel.
Keep the old relay (if functional) as a spare in the glove box.

Tips

The DME relay controls fuel pump, injectors, and DME computer power.
If car dies while driving and won't restart, DME relay is the prime suspect.
Some owners re-solder the original relay's cracked joints as a roadside repair.
Always carry a spare DME relay—this is the most common 944 failure.

Brake Pad Replacement

Easy 1-2 hours $80-150

Front and rear pads with a rotor check.

Interval Every 20,000-40,000 miles

Cost (DIY) $80-150

Tools

19mm socket for lug bolts
7mm Allen socket
13mm socket
C-clamp or brake piston tool
Wire brush
Brake cleaner
Brake grease
Jack and jack stands

Step by step

Loosen lug bolts while the car is on the ground.
Raise and support the car safely on jack stands.
Remove wheel to access the caliper.
Front calipers: Remove the two 7mm Allen caliper guide pin bolts.
Rear calipers: Remove the caliper bracket bolts (varies by year).
Swing or remove the caliper and support it—don't let it hang by the hose.
Remove the old pads from the caliper bracket.
Inspect rotor for scoring, cracks, or minimum thickness.
Clean pad contact areas in the bracket with wire brush.
Open brake fluid reservoir cap, then compress caliper piston.
Apply brake grease to the back of new pads and contact points.
Install new pads in the bracket.
Reinstall caliper and torque bolts to spec (63 ft-lbs for caliper bolts).
Reinstall wheel and torque lug bolts to 96 ft-lbs (130 Nm).
Repeat for all corners.
Pump brake pedal until firm before driving.

Tips

The 944 uses solid front rotors on base models, vented on Turbo and S2.
Rear brakes on 944 are cable-operated parking brake—adjust cable after pad change.
Bed in new pads with gradual stops—avoid hard braking for first 100 miles.

Timing Belt Condition Check

Easy 30-45 min $0

There's no inspection window on a 944, so checking the belts means pulling the upper timing cover. It's worth the half hour: on an interference engine, a cracked or oil-soaked belt is a warning you want to see early.

Interval Annually, or whenever you buy a 944 without belt records

Cost (DIY) $0

Tools

Flashlight
Sockets to remove the upper timing cover
Socket for the crank bolt, to turn the engine by hand
Belt tension gauge (Porsche 9201 or equivalent) if you want to check tension

Step by step

Let the engine cool and disconnect the battery.
Remove the upper timing belt cover at the front of the engine.
Check the timing belt and the balance shaft belt for cracks, glazing, fraying, or missing teeth.
Look for oil or coolant on either belt. Both belts should be clean and dry.
Turn the engine by hand at the crank bolt, clockwise only, to see the rest of each belt.
If you have the 9201 gauge, check tension against the workshop manual. Without it, don't adjust tension by feel.
Refit the cover and reconnect the battery.
If anything looks wrong, or there are no records of the last belt job, replace both belts, the rollers, and the water pump.

Tips

Oil on a belt usually means a leaking cam, balance shaft, or crank seal. Coolant on it points to the water pump. Fix the leak when you replace the belt.
A visual check doesn't replace the interval. Replace both belts every 30,000 miles or four years.

Watch out

This is an interference engine. A snapped timing belt bends valves.
Never turn the engine backward with the belts fitted.

Torque Specs

Values for common service jobs. Check the source listed for each table, and your own manual, before you torque anything critical.

Where these numbers come from

Engine

Component	Torque Spec	Notes
Cylinder Head Bolts	48 ft-lbs (65 Nm) + 90°	New bolts required, cold engine
Crankshaft Front Bolt (M16)	160 ft-lbs (217 Nm)	-
Timing Belt Tensioner	33 ft-lbs (45 Nm)	-
Balance Shaft Belt Tensioner	15 ft-lbs (20 Nm)	-
Camshaft Bearing to Head (M8)	15 ft-lbs (20 Nm)	-
Camshaft Housing to Head (Turbo)	15 ft-lbs (20 Nm)	-
Knock Sensor (pre-88)	7 ft-lbs (9 Nm)	From 88: 15 ft-lbs (20 Nm)
Spark Plugs	22 ft-lbs (30 Nm)	-
Oil Drain Plug	22 ft-lbs (30 Nm)	Replace washer
Upper Motor Mount Bolts (8mm)	17 ft-lbs (23 Nm)	-
Lower Motor Mount Bolts	32 ft-lbs (43 Nm)	-
Cross-Member Mounting Bolts (12mm)	63 ft-lbs (85 Nm)	-
Torque Tube to Clutch Housing (M10)	30 ft-lbs (42 Nm)	-

Suspension

Component	Torque Spec	Notes
Wheel Lug Bolts	96 ft-lbs (130 Nm)	Tighten in star pattern
Front Control Arm Lock Nut (12mm)	48 ft-lbs (65 Nm)	-
Front Control Arm Bracket Bolts (10mm)	34 ft-lbs (46 Nm)	-
Steering Knuckle Lock Nut (10mm)	37 ft-lbs (50 Nm)	-
Front Stabilizer to Control Arm (10mm)	18 ft-lbs (24 Nm)	-
Front Stabilizer Bracket (8mm)	17 ft-lbs (23 Nm)	-
Rear Bearing Flange to Cross Tube	34 ft-lbs (46 Nm)	-
Rear Bearing Flange to Body	52 ft-lbs (70 Nm)	-
Rear Trailing Arm to Axle Strut	66 ft-lbs (90 Nm)	-
Rear Trailing Arm to Cross Tube	45 ft-lbs (61 Nm)	-
Rear Shock to Body	45 ft-lbs (61 Nm)	-
Rear Shock to Trailing Arm	90 ft-lbs (123 Nm)	-
Rear Wheel Hub (Steel Arm)	280-332 ft-lbs (380-450 Nm)	-
Rear Wheel Hub (Aluminum Arm)	340 ft-lbs (460 Nm)	-

Brakes

Component	Torque Spec	Notes
Caliper Bolts	63 ft-lbs (85 Nm)	-
Brake Back Plate to Trailing Arm	43 ft-lbs (52 Nm)	Steel trailing arm only
Brake Line Fittings	11 ft-lbs (15 Nm)	Do not overtighten

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Useful references

Clarks Garage Technical The 944 shop manual and tech articles Lindsey Racing Torque Specs 944 torque specifications reference

Community Resources

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Porsche 944

Common Issues

Timing Belt and Balance Shaft Belt Failure

Estimated Repair Costs

Common Fixes

Common Parts

Same problem on other cars

Water Pump Failure

Estimated Repair Costs

Common Fixes

Common Parts

DME Relay Failure

Estimated Repair Costs

Common Fixes

Common Parts

Clutch Hydraulic System Failure

Estimated Repair Costs

Common Fixes

Common Parts

Torque Tube Bearing Wear

Estimated Repair Costs

Common Fixes

Common Parts

Dashboard Cracking

Estimated Repair Costs

Common Fixes

Common Parts

Power Steering Rack Leaks

Estimated Repair Costs

Common Fixes

Common Parts

Odometer and Speedometer Gear Failure

Estimated Repair Costs

Common Fixes

Common Parts

Engine Mount Deterioration

Estimated Repair Costs

Common Fixes

Common Parts

Restoration Guides

Complete Suspension Refresh

Parts List

Tools

Step by step

Tips

Watch out

References

Rust Prevention and Repair

Parts List

Tools

Step by step

Tips

Watch out

References

Electrical System Restoration

Parts List

Tools

Step by step

Tips

Watch out

References

Interior Restoration

Parts List

Tools

Step by step

Tips

Watch out

References

Timing and Balance Shaft Belt Replacement

Parts List

Tools

Step by step

Tips

Watch out

References

DIY Maintenance

Oil Change

Tools

Step by step

Tips