IMS bearing failure
usually 60,000–160,000 km · High risk
Signs: Metal in oil, rattle — can destroy the engine
Fix: Preventive IMS bearing retrofit
€1,500–3,500
Engine: common problems, timing drive and oil
3.4 / 3.6 flat-six (M96/M97)
Petrol · 2,480 / 2,687 / 3,179 / 3,387 / 3,596 / 3,824 cm³ · 150–261 kW
3
model generations
4
known faults
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
Fuel: Petrol. Timing drive: chain.
In our database this engine is fitted to 3 model generations, among them: Porsche Boxster / Cayman (986 / 987), Porsche 911 (997), Porsche 911 (996).
The most expensive known risk is bore scoring: it usually appears at 80,000–180,000 km and costs €8,000–20,000 to fix.
Key facts
| Fuel | Petrol |
|---|---|
| Displacement | 2,480 / 2,687 / 3,179 / 3,387 / 3,596 / 3,824 cm³ |
| Power | 150–261 kW |
| Years | 1997–2008 |
| Timing drive | Chain |
| Oil | 0W-40 / 5W-40 · Porsche A40 · ~8.5–10.0 L · every 15,000 km |
| Engine codes | M96, M97 |
Known engine faults
Faults that belong to the engine itself. They apply to every model with this engine, and each model has its own extra faults on its model page.
Rear main seal (RMS) leak
usually 60,000–150,000 km · Wear part
Signs: Oil drip between engine and gearbox
Fix: Replace seal (with clutch)
€400–1,200
Bore scoring
usually 80,000–180,000 km · High risk
Signs: Oil consumption, ticking, sooty tailpipe on one bank
Fix: Borescope inspection; engine rebuild
€8,000–20,000
Coolant expansion tank crack
usually 60,000–140,000 km · Wear part
Signs: Coolant smell, drops
Fix: Replace tank
€200–400
Engine-related service
Intervals and typical prices, using the Porsche Boxster / Cayman (986 / 987) as an example. The app gives the exact plan for your car.
| Item | Interval | Typical price |
|---|---|---|
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Spark plugsIgnition | every 60,000 km or every 48 months | €50–160 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
Models with this engine
Model generations this engine is fitted to.
Porsche 911 (996) 1997–2005Porsche 911 (997) 2004–2012Porsche Boxster / Cayman (986 / 987) 1996–2012
Common questions
Does the 3.4 / 3.6 flat-six (M96/M97) engine have a timing chain or a timing belt?
Chain.
What oil does the 3.4 / 3.6 flat-six (M96/M97) engine take?
0W-40 / 5W-40 · Porsche A40 · ~8.5–10.0 L · every 15,000 km.
What are the known problems with the 3.4 / 3.6 flat-six (M96/M97) engine?
The faults with the highest risk: bore scoring (80,000–180,000 km, €8,000–20,000); IMS bearing failure (60,000–160,000 km, €1,500–3,500).
Which cars have the 3.4 / 3.6 flat-six (M96/M97) engine?
Porsche Boxster / Cayman (986 / 987), Porsche 911 (997), Porsche 911 (996).
Sources and notes
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles.
Updated 08/10/2026