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1991 Porsche 944 Problems

Find the most common issues based on 1991 Porsche 944 owner complaints.
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Most Common 1991 Porsche 944 Problems

The driveshaft bearings on higher mileage vehicles may become noisy.
Engine oil leaks at the cam housing, balance shaft, cam shaft, and oil pump should be repaired quickly. The timing belt can become oily and deteriorate if leaks are not repaired.
Due to a broken plastic link at the servo motor for the heater control flap, the interior temperature can become wildly erratic.
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2 Known 1991 Porsche 944 Brakes Problems

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.
Aged brake fluid can cause numerous problems and should be replaced regularly.

6 Known 1991 Porsche 944 Drive Train Problems

The driveshaft bearings on higher mileage vehicles may become noisy.
The release arm for the throw out bearing can bind and cause problems with the clutch. Flywheel wear can cause driving and shifting problems and may cause the hubs to fail.
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...

0 Known 1991 Porsche 944 Electrical & Lights Problems

7 Known 1991 Porsche 944 Engine Problems

Engine oil leaks at the cam housing, balance shaft, cam shaft, and oil pump should be repaired quickly. The timing belt can become oily and deteriorate if leaks are not repaired.
The cooling system must be inspected regularly, as small leaks can develop at the reservoir. The heater valve and fan operation should also be inspected.
Corrosion/moisture at the throttle position sensor can cause performance issues relating to low boost.

1 Known 1991 Porsche 944 Exhaust & Emissions Problem

If engine misfiring, rough running, or fuel consumption issues are not resolved quickly, the catalytic converter can overheat and fail.

2 Known 1991 Porsche 944 Heating & Air Conditioning Problems

Due to a broken plastic link at the servo motor for the heater control flap, the interior temperature can become wildly erratic.
Due to a failed resistor pack, the HVAC fan may only operate on the high speed setting.

0 Known 1991 Porsche 944 Maintenance Problems

1 Known 1991 Porsche 944 Miscellaneous Problem

The front hood and rear deck lid support struts may fail; replacement is required.

1 Known 1991 Porsche 944 Suspension & Steering Problem

Suspension components (including control arms, boots, and ball joints) are critical and require regular inspection.

20
Known 1991 Porsche 944 Problems & Complaints

The constant velocity (CV) boots and CV joints should be inspected at each service. Servicing the torn CV boots early can prevent the need to replace the CV half shaft or CV joint.
Due to a failed resistor pack, the HVAC fan may only operate on the high speed setting.
Suspension components (including control arms, boots, and ball joints) are critical and require regular inspection.
Timing belt life cannot be ascertained by inspection only. The timing belt and water pump must be maintained using the correct belt-adjustment tool.
Aged brake fluid can cause numerous problems and should be replaced regularly.
Engine oil leaks at the cam housing, balance shaft, cam shaft, and oil pump should be repaired quickly. The timing belt can become oily and deteriorate if leaks are not repaired.
Corrosion/moisture at the throttle position sensor can cause performance issues relating to low boost.
Engine shut down or a "No Start" may be caused by cracks at the DME (fuel pump) relay solder joints. Repairing or replacing the failed relay should correct this concern.
Air leaks at the manifold gaskets can cause engine misfire (especially at idle) or black smoke under load.
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...
Automatic transmissions can leak internally and cause the automatic transmission fluid (ATF) to mix with the differential oil. An overfilled differential and/or a low fluid level in the ATF reservo...
Due to a broken plastic link at the servo motor for the heater control flap, the interior temperature can become wildly erratic.
In automatic transmissions, the flexible hub at the engine flywheel may deteriorate and fail, causing a large amount of play in the driveline. This failure may be caused by prolonged engine oil leaks.
The driveshaft bearings on higher mileage vehicles may become noisy.
The front hood and rear deck lid support struts may fail; replacement is required.
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