2021 FORD BRONCO SPORT — Complaint #2128262
Open-data reference.
NHTSA Complaint about POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT filed September 9, 2025
NHTSA complaint #2128262 (ODI reference 11685857) concerns a 2021 FORD BRONCO SPORT and was filed on September 9, 2025. The owner reports the failure occurred on September 9, 2025. The vehicle had 75,000 miles on the odometer at the time of the incident. The report was geocoded to Michigan based on the filer's self-reported location. The affected component is categorized as power train:driveline:differential unit, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.
The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.
Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same FORD BRONCO SPORT cohort independently describe similar power train:driveline:differential unit failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2021 FORD BRONCO SPORT shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2021 Ford Bronco Sport. The contact stated that while driving at slow speeds and turning in either direction, there was an abnormal grinding sound coming from the rear of the vehicle. Additionally, while driving at various speeds, the vehicle shuddered and hesitated while accelerating. The vehicle was taken to the local dealer, who diagnosed the vehicle and determined that the rear differential and transmission were faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was not yet contacted. The failure mileage was 75,000.
Complaint Details
| NHTSA Complaint ID | 2128262 |
| ODI Number | 11685857 |
| Date Filed | September 9, 2025 |
| Failure Date | September 9, 2025 |
| VIN | 3FMCR9B68MR |
Similar POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT Complaints for 2021 FORD BRONCO SPORT
The contact's son owns a 2021 Ford Bronco Sport. While the contact's son was driving at an undisclosed speed, the driver heard an abnormal grinding sound coming from the rear differential. The check e
The contact owns a 2021 Ford Bronco Sport. The contact stated while driving at undisclosed speeds and attempting to turn to the left or the right, there was an abnormal rubbing sound coming from the r
The contact owns a 2021 Ford Bronco Sport. The contact stated that while the daughter was driving at approximately 60 MPH, the vehicle suddenly lost automotive power. The vehicle was towed to the loca
The contact owns a 2021 Ford Bronco Sport. The contact stated that while driving at various speeds and making a turn, the rear wheels seized, and the vehicle made an abnormal sound. No warning light w
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.