2023 TESLA MODEL Y — Complaint #2129947
Open-data reference.
NHTSA Complaint about Chest Clip, Buckle, Harness filed September 13, 2025
NHTSA complaint #2129947 (ODI reference 11687035) concerns a 2023 TESLA MODEL Y and was filed on September 13, 2025. The owner reports the failure occurred on August 1, 2025. The report was geocoded to Utah based on the filer's self-reported location. The affected component is categorized as chest clip, buckle, harness, 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 TESLA MODEL Y cohort independently describe similar chest clip, buckle, harness 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 2023 TESLA MODEL Y shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The shoulder straps will not stay. They are supposed to lock in place once you adjust it and buckle the child in, but unfortunately, they will play back-and-forth and they will not lock in place. It is the same problem that Nuna is having with other versions of their car seat. We followed all instructions for cleaning, all instructions for maintenance, we have contacted the manufacturer and are unsatisfied with their response. They will not tell us what they think is broken, they will not tell us how to potentially fix it, nor will they admit that there is a problem, even though we have shown them video evidence. Instead, they want us to re-purchase a replacement item for half price. This issue allows the child to climb out of the car seat because the straps will not restrain them. The child can simply push on the straps and climb out.
Complaint Details
| NHTSA Complaint ID | 2129947 |
| ODI Number | 11687035 |
| Date Filed | September 13, 2025 |
| Failure Date | August 1, 2025 |
| VIN | 7SAYGAEE6PF |
Similar Chest Clip, Buckle, Harness Complaints for 2023 TESLA MODEL Y
After 8 months of use, the harness release button failed completely. This malfunction allowed the harness to loosen with our child in the car seat, while driving on a 3.5 hour road trip. Extremely sca
Complete failure of harness release button, allowing my child to loosen the harness by gently leaning forward. This is a malfunction on a replacement frame (used for less than 2 months), NUNA replaced
Harness is fraying from normal use; car seat is unsafe to use. Contacted company and they refused to replace it.
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.