1999–2005 Porsche 911: Metal in the oil or sudden engine failure (IMS bearing)
Likely causes, ranked
- Failed intermediate shaft (IMS) bearingShop
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: Often no warning. Some owners find metal flakes in the oil filter, a rattle from the back of the engine, or an oil leak at the IMS cover before the engine fails.
Likely causes
- IMS bearing. Rennlist owners document IMS failures on naturally aspirated M96/M97 engines. LN Engineering says the single-row bearings in many 2000–2005 cars fail more often than the early dual-row ones.
- Prevention. Many owners retrofit an upgraded bearing during a clutch job.
DIY or shop?
Porsche specialist.
Useful steps
- Inspect the oil filter for metal at every change.
- Ask a specialist which bearing your engine has.
- Consider a retrofit during clutch work.
Vehicle focus: 1999–2005 Porsche 911.
Safety / mechanic note
A failed IMS bearing can lock the engine while driving. Verify with a mechanic or dealer.
Recalls & service bulletins
No recalls or service bulletins are listed for this page yet.
NHTSA complaints: NHTSA complaint search returned too few keyword matches under this model name to be a reliable count.
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.