Vehicle Speed Control

NHTSA recall 91V219000 · announced December 17, 1991 · filed by Bayerische Motoren Werke · 15,200 units affected

The problem

THE CRANKCASE VENTILATION SYSTEM, VENTED INTO THE INTAKE TRACT OF THE ENGINE AT THE BELLOWS BOOT AHEAD OF THE THROTTLE HOUSING, ALLOWS WARM WATER VAPOR FROM THE CRANKCASE VENT TO CONDENSE AND FREEZE IN THE COLDER BELLOWS BOOT WHEN THE AMBIENT AIR TEMPERATURE IS 15 DEGREES FAHRENHEIT OR LESS. THE BUILD UP OF ICE CAN DISLODGE AND MOVE INTO THE THROTTLE HOUSING, PREVENTING THE THROTTLE PLATE FROM FULLY CLOSING WHEN THE DRIVER RELEASES THE GAS PEDAL.

The risk

IF THE THROTTLE PLATE IS PREVENTED FROM CLOSING, THEREIS AN INCREASE IN IDLE SPEED AS WELL AS SLOWER THAN NORMAL DECELERATION, WHICHOCCURS WITHOUT PRIOR WARNING AND COULD RESULT IN AN ACCIDENT.

What to do

REPLACE THE THROTTLE HOUSING WITH A VERSION CONTAINING A MODIFIED HEATING SYSTEM ALONG WITH REROUTING OF THE CVS HOSE. THIS WILL PREVENT ICE BUILD-UP IN THE INTAKE TRACT.

Notes

SYSTEM: THROTTLE LINKAGES AND CONTROL.VEHICLE DESCRIPTION: PASSENGER VEHICLES.

Vehicles covered by this recall

• 1991 Bmw 318
• 1992 Bmw 318

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.