# NHTSA Engineering Analysis EA86019
> **REAR BRAKE FAILURE** · Opened 1986-06-17 · Closed 1988-07-22
## Investigation
- **Action number:** EA86019
- **Type:** Engineering Analysis
- **Open date:** 1986-06-17
- **Close date:** 1988-07-22
- **Manufacturer:** General Motors, LLC
- **Affected makes:** CHEVROLET; PONTIAC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1982, 1983, 1984, 1985, 1986
- **Affected (make, year) variants:** 10
## Summary

SUMMARY: THE REAR DISC BRAKE ADJUST MECHANISM FAILS TO FUNCTION AFTER CORROSION OCCURS. GM HAS REDESIGNED CALIPER ASSM. SAME DESIGN AND PROBLEM ON GM'S E, F, AND P CARS. INVESTIGATION HAS BEEN COMBINED INTO ONE WITH ALL GM CARS USING SAME REAR DISC BRAKE DESIGN.===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=EA86019)
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