# NHTSA Preliminary Evaluation PE86057
> **BRAKE FAILURE/FIREWALL** · Opened 1986-05-23 · Closed 1986-09-26
## Investigation
- **Action number:** PE86057
- **Type:** Preliminary Evaluation
- **Open date:** 1986-05-23
- **Close date:** 1986-09-26
- **Manufacturer:** General Motors, LLC
- **Affected makes:** CHEVROLET; PONTIAC
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1979, 1980, 1981
- **Affected (make, year) variants:** 6
## Summary

ANALYSIS:THE COMPLAINT HAS BEEN VERIFIED WITH THE VEHICLE'S OWNER AND ASTATE OF MICHIGAN CONSUMER REPRESENTATIVE.THE BENDIX REPORT WAS SUPPLIEDBY A MIDAS REPRESENTATIVE, AND REMAINS UNCONFIRMED.ALTHOUGH NO OTHERCOMPLAINTS IDENTIFY THIS PARTICULAR CONDITION, THERE ARE SEVERAL REPORTEDINCIDENTS OF UNEXPLAINED BRAKE LOSS AMONG THE SUBJECT VEHICLES.THERE ARENO TSB'S OR RECALLS REGARDING THE ALLEGED DEFECT.PROPOSED ACTION:PREPARE AN INFORMATION REQUEST TO GM AND BENDIX.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE86057)
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