Service brakes, hydraulic › Power assist › Vacuum › Hoses, lines/piping, and fittings
Porsche 911
Reported Dec 7, 19931,149 vehicles affectedPORSCHE CARS N.A. INC.Built Jul 1, 1990 – Oct 1, 1992
The defect
The hydraulic brake pressure reduction valve causes the rate of hydraulic pressure reduction to slow down, which may result in the rear wheels locking-up even with the anti-lock brake system in operation.
The risk
Rear wheel lock-up may result in loss of vehiclecontrol and an accident.
The remedy
Porsche dealers will install a modified hydraulic brake pressure reduction valve.
System: brakes; hydraulic; power assist; check valve.vehicle description: passenger vehicles; models 911 turbo and 911 americaroadster.note: if your vehicle IS presented to an authorized dealer on an agreed uponservice date and the remedy IS not provided within a reasonable time and freeof charge or the remedy does not correct the defect or noncompliance, pleasecontact porsche service center at 1-800-545-8039. Also contact the nationalhighway traffic safety administration's auto safety hotline at 1-800-424-9393.