The Resource Hub for Enthusiasts

Keep Your Classic German Machine on the Road

Comprehensive guides, verified specs, and trusted resources for BMW and Porsche owners who do it right.

17 Vehicle Platforms
136 Guides
465 Torque Specs
124 Parts Suppliers

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

Everything You Need

Built by enthusiasts, for enthusiasts

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Common Issues

Detailed documentation of known problems with symptoms, causes, and proven fixes. Know what to look for before it becomes expensive.

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Repair Costs

DIY vs shop cost estimates for every repair. Plan your budget with real-world pricing and labor hour estimates.

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Torque Specs

Factory-verified torque specifications for engine, suspension, brakes, and drivetrain. No more guessing or searching forums.

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OEM Part Numbers

Genuine part numbers for common replacement items. Cross-reference with aftermarket alternatives to save money.

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Parts Suppliers

Curated lists of trusted OEM, aftermarket, and used parts suppliers. Know where to buy quality parts.

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Powerful Search

Search across all vehicles, issues, specs, and suppliers. Find exactly what you need in seconds.

Community

Join the Community

Connect with fellow enthusiasts, share knowledge, and discuss classic BMW and Porsche topics.

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Forums

Technical discussions, project threads, and expert advice from fellow enthusiasts.

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Parts Marketplace

Buy and sell parts within a trusted community of enthusiasts.

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Events

Car meets, tech sessions, and driving events near you.

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Ready to dive in?

Start with your vehicle and discover everything ZRG Classics has to offer.