NHTSA investigationDP78006
Investigation DP78006: Vehicles
- Status
- CLOSED
- Opened
- Nov 23, 1977
- Closed
- Apr 4, 1978
- Model years
- —
Subject
121 braking system (warner), air control
Summary
121 braking system (warner), air control valve clogged
An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.