Defect summary
THE ZINC PLATING OPERATION PERFORMED ON THE UPPER STEERING COLUMN SHAFT COUPLING BOLT CAUSED HYDROGEN EMBRITTLEMENT AND BREAKAGE OF THE BOLT.
Consequence
FRACTURES OF THE UPPER STEERING COLUMN SHAFT COUPLINGBOLT RESULT IN A LACK OF COUPLING LOAD ON THE SHAFT AND LOSS OF STEERINGCONTROL.
Remedy
REPLACE THE ZINC PLATED BOLT WITH A PHOSPHATE PLATED BOLT.
Notes
SYSTEM: STEERING; UPPER STEERING COLUMN COUPLING BOLT.VEHICLE DESCRIPTION: PASSENGER VEHICLES; SEDANS, CONVERTIBLES, AND MINI-VANS.
Source: NHTSA ODI recalls file, campaign 92V015000. Text as published by NHTSA.