Waterman7

2003 Boxster S every time I hit 20 mph my PSM and ABS lights come on. Not brake light switch, not low battery voltage. My Porsche mechanic says it is my Bosch precharge pump which makes a slight wining noise just before the lights come on. Has anyone changed their precharge PSM pump?
now one is over $2,000 so ought a used one on line. Afraid to change it not knowing how involved it is. My Porsche won’t use a used one for fear of liability and lack of profit possibly. Any help appreciated.

Waterman7

Any answer to the difficulty of changing the Precharge pump above? Noise from the pump and subsequent PSM and ABS lights come on together then reset as soon as car is shut off
reoccurs each time I start up and go over 20 mph

Starter986

You could:

1. Find a solid indie in your area.

2. Go to a more robust 986 forum with your inquiries.