1995 Porsche 928 Problems

RepairPal has identified the most common problems with the 1995 Porsche 928 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

The ignition system must be maintained—distributor caps, rotors, and cables require attention. The misfire detection system can cause the engine to shut down by half. The root cause of the problem must be ascertained before repair.

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

Timing belt life cannot be ascertained by inspection only. The timing belt and water pump must be maintained using the correct belt-adjustment tool. 

Intake air leaks at the manifold and elsewhere are common.

Mass air flow meters can fail unexpectedly.
A failing ECM or a fuel pump issue can cause a "No Start" condition.

Suspension components (including ball joints) are critical and require regular inspection.

Mechanical wear in the clutch and clutch release mechanism can cause shifting engagement and noise issues.

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.
Due to wear in the differential multi-disc clutch, the PSD (Porsche Slip Differential) locking system light may illuminate. The independent hydraulic fluid supply for the PSD needs to be maintained properly, including the filling/replacement of fluid before problems develop.

The constant velocity (CV) boots and CV joints should be inspected at each service.

The AC climate control system can be erratic. Diagnoses of the interior sensors, actuators, and control assembly will  be necessary to determine the cause of any AC problems.

An alignment issue at the driveshaft/flex plate interface can cause a worn engine thrust bearing in the automatic transmission. Revised parts and assembly procedures are available.

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

When changing speeds at random or while going over bumps, the interior fan speed can be erratic. A replacement fan control resistor is required.