Keep Your Classic German Machine on the Road
Comprehensive guides, verified specs, and trusted resources for BMW and Porsche owners who do it right.
What are you working on?
Search across all vehicles for issues, specs, guides, and suppliers
Vehicle Platforms
Select your vehicle for common issues, repair costs, torque specs, and parts suppliers
BMW
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Everything You Need
Built by enthusiasts, for enthusiasts
Common Issues
Detailed documentation of known problems with symptoms, causes, and proven fixes. Know what to look for before it becomes expensive.
Repair Costs
DIY vs shop cost estimates for every repair. Plan your budget with real-world pricing and labor hour estimates.
Torque Specs
Factory-verified torque specifications for engine, suspension, brakes, and drivetrain. No more guessing or searching forums.
OEM Part Numbers
Genuine part numbers for common replacement items. Cross-reference with aftermarket alternatives to save money.
Parts Suppliers
Curated lists of trusted OEM, aftermarket, and used parts suppliers. Know where to buy quality parts.
Powerful Search
Search across all vehicles, issues, specs, and suppliers. Find exactly what you need in seconds.
Tools for the Workshop
Practical tools to help you work smarter. Built for home mechanics and professional shops alike.
Invoice Creator
Generate professional repair invoices with parts, labor, and tax calculations. Export to PDF.
Maintenance Tracker
Track service history, set reminders, and never miss an interval again.
Build Cost Calculator
Estimate restoration and modification costs before you start your project.
Restoration Checklist
Step-by-step checklists for full restorations, organized by system and priority.
Join the Community
Connect with fellow enthusiasts, share knowledge, and discuss classic BMW and Porsche topics.
Forums
Technical discussions, project threads, and expert advice from fellow enthusiasts.
Parts Marketplace
Buy and sell parts within a trusted community of enthusiasts.
Events
Car meets, tech sessions, and driving events near you.
Ready to dive in?
Start with your vehicle and discover everything ZRG Classics has to offer.