2006 Porsche 911 Problems: 3 Issues Every Owner Should Know
2006 model year · 12,100+ owner reports · Updated April 2026
According to Au7o's analysis of 12,100+ owner reports, the 2006 Porsche 911 has 3 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Intermediate Shaft (IMS) Bearing Failure with 5,500 owner reports. Across all issues, repair costs range from $500 to $4,500. DIY maintenance guides at au7o.io.
All 3 Known Issues
On the 1999-2019 Porsche 911, the rear main seal on the M96, M97, and MA1 flat-six engines is prone to leaking oil onto the clutch and flywheel. The seal hardens over time and the flange design allows oil to migrate past the seal. This is often discovered during clutch replacement or when oil drips appear under the rear of the car.
Common Symptoms
- Oil drip from bellhousing area
- Burning oil smell from rear of car
- Clutch slipping due to oil contamination
- Oil spots on garage floor near rear axle
- Visible oil on flywheel during inspection
How to Fix
Replace the rear main seal. This requires transmission removal and is commonly done alongside clutch replacement and IMS bearing upgrade to save labor costs. Use the updated Porsche OEM seal design.
What Owners Are Using
Parts and tips from 3,800+ owners who fixed this issue
- TipAlways replace the RMS when doing a clutch job — the labor overlap saves $1,000+. Bundle with IMS bearing replacement on 996/997 cars.
On the 1999-2008 Porsche 911, the AOS diaphragm on M96/M97 engines ruptures over time, causing unmetered air leaks into the intake manifold and excessive oil consumption. The failed AOS allows oil vapor to be drawn directly into the intake system rather than being separated and returned to the crankcase. This leads to rich running, fouled spark plugs, and smoke from the exhaust.
Common Symptoms
- Excessive oil consumption
- White or blue smoke from exhaust
- Rough idle and vacuum leak symptoms
- Oil fouled spark plugs
- Strong oil smell in cabin with heat on
How to Fix
Replace the AOS unit. Use an updated OEM Porsche unit or aftermarket upgrade from LN Engineering. The AOS is located in the engine V between the cylinder banks and requires moderate disassembly to access.
What Owners Are Using
Parts and tips from 2,800+ owners who fixed this issue
- UpgradeLN Engineering upgraded AOS with improved diaphragm material — lasts significantly longer than the OEM unit. Direct bolt-in replacement. (LN Engineering #LN-AOS)