Close

Porsche 911 Problems

RepairPal has identified the most common problems with the Porsche 911 based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
50
Known Problems

Smoke, oil consumption, and fuel trim issues with various fault codes can be traced to an internal leak at the oil separator.

Valve cover leaks are common.

Cam tensioner/cam timing issues can cause the Check Engine Light to illuminate.

Engine oil leaks can occur at the rear main seal and/or intermediate support cover o-ring; a revised seal is available. A careful diagnosis with proper tools is necessary to verify dimensional accuracy of the crankshaft to engine block.

Due to air leaks at various locations, the Check Engine Light may illuminate.

Check Engine Light illumination and performance issues can be caused by oxygen sensor faults.

Over time, the engine can leak oil at various locations. Early-production vehicles require engine disassembly and modification to resolve leaks at the cylinder heads, oil return tubes, valve covers, timing cover, chain housings, case through bolts, and lines to/from the oil cooler.

A failing mass air flow sensor or EVAP purge valve can cause misfire issues.

A small leak in the coolant reservoir can cause persistent coolant loss. To ensure engine longevity, coolant loss and overheating issues need to be resolved. Out technicians tell us the proper coolant fill procedure must be followed when refiling the cooling system.

Various fuel trim and oxygen sensor limit fault codes can be traced to an internal vacuum leak at the oil separator.

 

The release mechanism for the clutch (including the release arm bearings and shaft) can fail and cause stiff, binding, and possibly noisy pedal operation.
The clutch release on early-production vehicles requires modification to make it compatible with newer repair parts.
The hydraulic fluid for the clutch system may be overlooked; the fluid should be replaced regularly during brake fluid service.
If aging or contaminated fluid is not replaced, there may be problems in the lines and actuating components, as well as clutch issues that are difficult to diagnose.

The accumulation of moisture at major connectors and control units can cause various ABS/PDAS faults due to corrosion.