Fuel system, gasoline: delivery: hoses, lines/piping, and fittings
Manufacturer
BAYERISCHE MOTOREN WERKE
Vehicles affected
116,300
Reported to NHTSA
1994-04-11
Owners notified
1994-06-25
Defect description
FEED FUEL HOSES CAN HARDEN AND "SET" OVER TIME, ALLOWING A SEEPAGE OF FUEL AT THE CONNECTION BETWEEN THE HOSE AND THE ENGINE FITTING. THE CLAMP USED TO HOLD THE HOSE TO THE FITTING IS UNABLE TO COMPENSATE FOR THE HARDENING OF THE FEED FUEL HOSE.
Safety risk
FUEL SEEPAGE BETWEEN THE FEED FUEL HOSE AND THE ENGINE FITTING CAN RESULT IN FREE FUEL IN THE ENGINE COMPARTMENT, WHICH COULD RESULT IN A FIRE WHEN EXPOSED TO A SOURCE OF IGNITION.
Manufacturer remedy
A REDESIGNED FEED FUEL HOSE AND HOSE CLAMP WILL BE INSTALLED TO ALLEVIATE THE FUEL SEEPAGE.
THE ADHESIVE MATERIAL OF THE TWO PIECE THROTTLE BODY HEATER MIGRATES INTO THE CIRCULATION CHAMBER CAUSING BUILD UP OF IMPURITIES AND RESTRICTION OF FLOW WITHIN THE CHAMBER. THIS CONDITION AND WATER VAPORS FROM THE CRANK THAT FREEZES AT LOW AMBIENT AIR TEMPERATURES PREVENTS THE THROTTLE PLATE FROM CLOSING AS THE DRIVER RELEASES THE GAS PEDAL, CAUSING LOSS OF THROTTLE CONTROL.
Safety risk
IF LOSS OF THROTTLE CONTROL FROM THE FROZEN THROTTLE BODY OCCURS WHILE THE VEHICLE IS IN MOTION, A VEHICLE CRASH COULD OCCUR.
Manufacturer remedy
BMW DEALERS WILL REPLACE THE THROTTLE BODY HEATER WITH A MODIFIED HEATER.
THE MALFUNCTION OR FAILURE OF A COOLANT SYSTEM COMPONENT RESULTS IN SIGNIFICANTLY INCREASED COOLANT TEMPERATURE AND A RESULTING INCREASE IN SYSTEM PRESSURE.
Safety risk
VEHICLES OPERATED UNDER THIS INCREASED COOLING SYSTEMPRESSURE CONDITION CAN SUFFER DAMAGE OR FAILURE OF PARTS OF THE COOLING SYSTEMSUCH AS (1) LEAKAGE FROM A COOLANT HOSE, (2) LEAKAGE OF THE RADIATOR OREXPANSION TANK, (3) DISCONNECTION OF A HOSE FROM A PIPE OR A FITTING, AND (4)CRACKS IN THE HEATER CORE END PIECE RESULTING IN COOLANT LEAKAGE. IN SOME CASES,BOILING COOLANT CAN CONTACT THE LOWER RIGHT LEG OF THE DRIVER RESULTING INBURNS. ALSO, ESCAPING COOLANT IN THE PASSENGER COMPARTMENT CAN CAUSE VAPORFOGGING OF THE INTERIOR SURFACE OF THE WINDOWS, REDUCING DRIVER VISIBILITY.
Manufacturer remedy
DEALERS WILL INSTALL A THERMOSTATIC BYPASS VALVE IN THE ENGINE COMPARTMENT TO CONTROL COOLANT TEMPERATURE IN THE HEATER CORE. ALSO, A NEW DESIGN RADIATOR CAP WILL BE INSTALLED, TO CONTROL PRESSURE AND PROVIDE GREATER COOLANT OVERFLOW IN THE EVENT OF OVERHEATING.
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.
Safety 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.
Manufacturer remedy
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.
Owner complaints
A complaint is one person's report to a federal agency. It is not a finding.
Component
Complaints
Median mileage
Engine and engine cooling: engine
5
—
Engine and engine cooling: cooling system
2
—
Parking brake: conventional
2
—
Electrical system: starter assembly
1
—
Engine and engine cooling: cooling system: radiator assembly
1
—
Fuel system, other: delivery: hoses, lines/piping, and fittings
1
—
Latches/locks/linkages: doors: latch
1
—
Power train: manual transmission: floor shift assembly
1
—
Service brakes, hydraulic: foundation components
1
—
Vehicle speed control
1
—
Visibility: glass, side/rear
1
—
The 1991 model has about a third as many complaints as this one. The 1993 model has roughly the same number of complaints as this one. These figures reflect raw complaint counts, not failure rates. Higher-selling model years naturally receive more complaints.
Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.