# NHTSA Defect Petition DP78026
> **121 BRAKING SYSTEMS, ERRATIC COMPUTER** · Opened 1978-03-09 · Closed 1978-06-02
## Investigation
- **Action number:** DP78026
- **Type:** Defect Petition
- **Open date:** 1978-03-09
- **Close date:** 1978-06-02
- **Manufacturer:** UNKNOWN MANUFACTURER
- **Affected makes:** ALL
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 9999
- **Affected (make, year) variants:** 1
## Summary

121 BRAKING SYSTEMS, ERRATIC COMPUTER

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=DP78026)
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