Porsche 944 Problems

RepairPal has identified the most common problems with the Porsche 944 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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Known Problems

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.

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.

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 in the lines and actuating components, as well as clutch issues that are difficult to diagnose.
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 reservoir is symptomatic of this. If not repaired immediately, the transmission will fail; the pinion seals will also need replacement.

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.