2006–2008 Audi A4: Cold-start rattle or timing warning (3.2 FSI timing chain)
Likely causes, ranked
- Worn timing chain tensionersShop
- Stretched chains and worn guidesShop
Real-owner fix counts will appear here as reports come in.
DIY or shop: See DIY or shop section
Parts to check
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Symptom: A rattle for a few seconds on cold starts, then longer rattles, and later a check-engine light for cam timing.
Likely causes
- Tensioners and chains. Audizine and AudiWorld owners describe tensioner and chain wear on the 3.2 FSI. They track it using cam adjustment values in diagnostic software.
- Repair scope. Owners report the upper tensioners can be done with the engine in the car, but chains and guides at the back of this engine usually mean pulling the engine.
DIY or shop?
Shop, usually an Audi specialist.
Useful steps
- Have the cam adjustment values checked.
- Don't ignore a cold-start rattle that gets longer.
- Get quotes from Audi specialists.
Vehicle focus: 2006–2008 Audi A4.
Safety / mechanic note
A jumped chain can wreck the engine. Verify with a mechanic or dealer.
Recalls & service bulletins
No recalls or service bulletins are listed for this page yet.
NHTSA complaints: 12 keyword-matched complaints for Audi A4 2006–2008 (of 484 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-15).
Always check your VIN for open recalls at nhtsa.gov/recalls.
Sources
What actually fixed it?
Had this problem? Tell other owners what the real fix was. Reports are counted above; we never show made-up numbers.