# NHTSA Defect Petition DP98001
> **HEAVY LATERAL VIBRATION** · Opened 1998-01-06 · Closed 1998-02-04
## Investigation
- **Action number:** DP98001
- **Type:** Defect Petition
- **Open date:** 1998-01-06
- **Close date:** 1998-02-04
- **Manufacturer:** Ford Motor Company
- **Affected makes:** FORD
- **Affected components:** STRUCTURE
- **Affected model years:** 1991, 1992, 1993, 1994
- **Affected (make, year) variants:** 4
## Summary

NHTSA WAS PETITIONED TO COMMENCE A DEFECT INVESTIGATION OF THE SUBJECT VEHICLES ON JANUARY 6, 1998.THE PETITION ALLEGES THAT EARLY MODEL FORD EXPLORER SPORT UTILITY VEHICLES DEVELOP HEAVY LATERAL VIBRATIONS AT SPEEDS ABOVE 55 MPH AND WHEN ENCOUNTERING BUMPS AT LOW SPEEDS.THE PETITION FURTHER ALLEGES THAT THESE VIBRATIONS COULD POSSIBLY CAUSE LOSS OF VEHICLE CONTROL.THE ANALYSIS OF THE PETITION IS PRESENTED IN THE ATTACHED NOTICE WHICH IS PUBLISHED IN THE FEDERAL REGISTER.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=DP98001)
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