2004 Luxury Car Reliability
Posts for 2004:
Brand Guides
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Browse our architecture of reliability guides, common failure analyses, and maintenance notes grounded in owner reports and specialist workshop data.
Porsche Study
Analysis of PDK electronics, 9A1/MA1 bore scoring patterns, and Mezger engine longevity data. Access Database
BMW Study
S63/N63 rod bearing failure database, S55 hub-bolt solutions, and ZF8HP transmission maintenance protocols. Access Database
Mercedes Study
M177/M178 'Hot V' turbo heat management, M156 head bolt technical bulletins, and Airmatic failure diagnostics. Access Database
Audi Study
Rocker arm wear on the EA839 V6, 4.0T oil screen service guidance, and DSG transmission notes. Access Database
Bentley Study
Reliability insights on the 4.0T V8 and W12 vacuum systems, air suspension maintenance, and electronics. Access Database
Range Rover Study
L405/L494 chassis reliability, SDV6 crankshaft failure points, and active anti-roll bar repair costs. Access Database
Lamborghini Study
V10/V12 supercar longevity data. Specialized gearbox sensor troubleshooting and carbon-ceramic brake wear tracking. Access Database
Rolls-Royce Study
Ownership guides for the N74 V12, complex air-ride suspension maintenance, and electrical systems. Access Database
Updated for 2026 ownership data
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