PONTIAC BONNEVILLE BROUGHAM 1978: WHEELS:LUGS/NUTS/BOLTS/STUDS

General Information

NHTSA Campaign ID Number: 77V200000

Make Model Year
PONTIAC BONNEVILLE BROUGHAM 1978
Date Received by ODI Date Added to Database
1977-11-16 1979-10-12

Manufacturers Involved: General Motors, LLC

Component: WHEELS:LUGS/NUTS/BOLTS/STUDS

Potential Number Of Units Affected: 4504

Report Initiator: MFR MFR Report

Summary

THE REAR WHEEL MOUNTING BOLTS ON THE AFFECTED VEHICLES, ARE BRITTLE AND THEREFORE MAY FRACTURE. THIS BRITTLENESS IS DUE TO IMPROPER HEAT TREATMENT DURING MANUFACTURE. IF THE BOLTS BREAK, THE TIRE AND WHEEL ASSEMBLY MAY SEPARATE FROM THE VEHICLE.

Remedy

DEALER WILL INSPECT AND, IF NECESSARY, WILL REPLACE DEFECTIVE BOLTS ON ALL AXLES AND THE TEN REAR AXLE WHEEL MOUNTING BOLTS, FREE OF CHARGE.

Notes

VEHICLE DESCRIPTION: PASSENGER VEHICLES.SYSTEM: SUSPENSION; REAR WHEEL MOUNTING BOLTS.CONSEQUENCES OF DEFECT: IF SEPARATION OCCURS UNDER VEHICLE OPERATION, LOSS OFVEHICLE CONTROL WITHOUT PRIOR WARNING AND AN ACCIDENT COULD RESULT.