2008 AUDI A8 BHF/CGWB (4E)
4E / Sedan / Global (Europe, North America, Asia; engine availability varies by market)
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Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Timing chain tensioner failures on some V8 engines
- Air suspension leaks (adaptive air suspension variants)
- Electrical issues with MMI and climate control units
First checks
- Compression and leak down test for engine health
- Check adaptive air suspension for leaks
- Inspect timing chain tensioners and guides
Avant de remplacer des pièces
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- 2008 model year represents mid-cycle of second-generation A8 (D3).
- Market-dependent engine options and emissions equipment; US market typically petrol V8 only.