Smoke, oil consumption, and fuel trim issues with various fault codes can be traced to an internal leak at the oil separator.
Problems for specific Porsche Boxster years:
Car problem reports
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Most reported 1999 Porsche Boxster problems
If the vehicle cannot return to run position after start or if the interior fan is not getting power, it may be the electrical portion of the ignition switch has become erratic or has failed. The entire switch assembly should be replaced.
The power windows not lowering when the Cabriolet top latch and/or door handle is operated or lowering unexpectedly while driving can be caused by a failing Cabriolet top or door handle micro switch. Diagnoses will be required to determine which switch is at fault and will require replacement.
Persistent coolant loss can be caused by a small leak at the coolant reservoir. Our technicians tell us the leak may not be visible due to the trunk carpet hiding the leak.
If the airbag warning light illuminates, it must be attended to quickly. Seat belt buckles, wiring updates/repairs, and/or airbag module faults may be the cause.
Abnormal noise may be noted when shifting or reverse gear is selected in vehicles with a manual transmission. If this problem is encountered, proper operation of shift cables and clutch should be verified before any other repairs are attempted.
The drains in the Cabriolet top can clog, causing water to leak onto the carpets. Water can also accumulate in the doors, causing various electrical problems.
Cam tensioner/cam timing issues can cause the Check Engine Light to illuminate.
Engine vacuum leaks can develop from various locations resulting in illumination of the Check Engine Light.
Various fuel trim and oxygen sensor limit fault codes can be traced to an internal vacuum leak at the oil separator.