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.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Porsche 911 | 1991, 1992, 1993 |
Components: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM:HOSES, LINES/PIPING, AND FITTINGS
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Porsche 911 | 1991 | 1 | 4 |
| Porsche 911 | 1992 | 2 | 4 |
| Porsche 911 | 1993 | 0 | 2 |
Other service brakes, hydraulic recalls in 1993
20 of the 223 recall campaigns reported to NHTSA in 1993 concerned the service brakes, hydraulic; PORSCHE CARS N.A. INC. filed 72 campaigns in all.
| 93V214000 14 Dec 1993 | GENERAL MOTORS CORP. |
| 93V188000 12 Nov 1993 | INTERNATIONAL TRUCK AND ENGINE |
| 93V171000 19 Oct 1993 | GENERAL MOTORS CORP. |
| 93V156000 24 Sept 1993 | CARPENTER INDUSTRIES, INC. |
| 93V152000 15 Sept 1993 | GENERAL MOTORS CORP. |
| 93V146000 13 Sept 1993 | FORD MOTOR COMPANY |
| 93V141000 26 Aug 1993 | CRANE CARRIER COMPANY |
| 93V119000 2 Aug 1993 | GENERAL MOTORS CORP. |
NHTSA recalls (public domain) · all recalls of 1993