2003 Porsche 911 Problems

RepairPal has identified the most common problems with the 2003 Porsche 911 as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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12
Known Problems

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.

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.

 

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

Abnormal noises from the intermediate shaft area may be signs of impending engine failure, don't wait to get this issue checked out!

Pay close attention to warning lights and have the brakes inspected regularly—immediately address any brake problems. Hard driving habits will cause excessive brake pad and rotor wear.

An internal transmission problem can cause difficulty engaging or downshifting from second gear. Improved parts are available as of the 1997 model year.
Ring and pinion failure can occur on 4WD versions.