Audi A8 D3 4.2 TDI V8 Timing Chain Guide Failure
Audi
A8
2003
4.2 TDI V8 ASE
⚡ Quick Summary
Severity Level
High
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Can become a safety issue if left unresolved
Urgency Level
🟠 Fix Soon
The timing chain guides on the 4.2 TDI V8 engine in D3 A8 wear at high mileage causing chain rattle and P0016/P0017 codes. The V8 diesel has two chain runs and guide replacement requires significant engine disassembly. Cost: £2,000-4,000. Always replace guides, tensioners and chains together.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Audi A8 2003 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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