2015 CADILLAC CTS — Complaint #2029812
Open-data reference.
NHTSA Complaint about POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT filed October 4, 2024
NHTSA complaint #2029812 (ODI reference 11618015) concerns a 2015 CADILLAC CTS and was filed on October 4, 2024. The owner reports the failure occurred on August 4, 2024. The vehicle had 125,000 miles on the odometer at the time of the incident. The report was geocoded to Maryland 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 CADILLAC CTS 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 2015 CADILLAC CTS shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2015 Cadillac CTS. The contact stated that there was an abnormal loud clunking sound coming from the rear end of the vehicle while the vehicle was shifting into gears. The vehicle was taken to AMCO Transmissions & Total Car Care, where it was diagnosed that the rear differential had failed and needed to be replaced. The contact stated that the vehicle was previously serviced under the NHTSA Campaign Number: 20V038000(Power Train); however, the failure persisted. The vehicle was not repaired. The local dealer and the manufacturer were notified of the failure. The failure mileage was 125,000.
Complaint Details
| NHTSA Complaint ID | 2029812 |
| ODI Number | 11618015 |
| Date Filed | October 4, 2024 |
| Failure Date | August 4, 2024 |
| VIN | 1G6AU5S89F0 |
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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.