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1999 Porsche 911 Problems

Find the most common issues based on 1999 Porsche 911 owner complaints.
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Most Common 1999 Porsche 911 Problems

Smoke, oil consumption, and fuel trim issues with various fault codes can be traced to an internal leak at the oil separator.
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 ...
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 dimensiona...
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1 Known 1999 Porsche 911 Brakes Problem

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.

2 Known 1999 Porsche 911 Drive Train Problems

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.

0 Known 1999 Porsche 911 Electrical & Lights Problems

6 Known 1999 Porsche 911 Engine Problems

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

3 Known 1999 Porsche 911 Exhaust & Emissions Problems

Due to air leaks at various locations, the Check Engine Light may illuminate.
Various fuel trim and oxygen sensor limit fault codes can be traced to an internal vacuum leak at the oil separator.
A failing mass air flow sensor or EVAP purge valve can cause misfire issues.

0 Known 1999 Porsche 911 Heating & Air Conditioning Problems

0 Known 1999 Porsche 911 Maintenance Problems

0 Known 1999 Porsche 911 Miscellaneous Problems

0 Known 1999 Porsche 911 Suspension & Steering Problems

12
Known 1999 Porsche 911 Problems & Complaints

Cam tensioner/cam timing issues can cause the Check Engine Light to illuminate.
Due to air leaks at various locations, the Check Engine Light may illuminate.
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.
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 dimensiona...
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 ...
Various fuel trim and oxygen sensor limit fault codes can be traced to an internal vacuum 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.
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