2021 TESLA MODEL Y — Complaint #2120395
Open-data reference.
NHTSA Complaint about LANE DEPARTURE: ASSIST filed August 14, 2025
NHTSA complaint #2120395 (ODI reference 11680546) concerns a 2021 TESLA MODEL Y and was filed on August 14, 2025. The owner reports the failure occurred on July 24, 2025. The report was geocoded to California based on the filer's self-reported location. The affected component is categorized as lane departure: assist, 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 lane departure: assist 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 TESLA MODEL Y shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
Iâve had to replace the steering rack, upper and lower control arm for the left wheel, entire computer motherboard. I drove the car for less than 70k miles and zero accidents and zero modifications. Yes I am open for inspection. While driving with fsd lane keep failed causing the car to veer to other lane. The tesla repair shop said the steering rack was sending errors and the whole rack needs to be replaced. They said it was both electrical and mechanical failure. Previously Iâve had the control arms replaced because it was making clicking noise when I turn the wheel. They said it was due to front compliance link and lateral link issues. Also had entire computer board replaced previously. The error message after the incident was lane assist disabled, steering assist reduced. In the maintenance mode it said â The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects a low voltage (LV) battery undervoltage event.â
Complaint Details
| NHTSA Complaint ID | 2120395 |
| ODI Number | 11680546 |
| Date Filed | August 14, 2025 |
| Failure Date | July 24, 2025 |
| VIN | 5YJYGDEE3MF |
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What component or system failed or malfunctioned, and is it available for inspection upon request? System computer. After a Over the Air (OTA) update, most driver assistive functions are inoperative.
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.