2021 Tesla Model Y driver assistance problems

Filed Nov 7, 2026 · Acceleration, Driver assistance · VA

I am reporting a potential safety defect in my 2021 Tesla Model Y, currently showing 47,582 miles, involving electrical, software, and driver-assistance systems. Problems began around August 2026. By September 10, 2026, automatic high beams were malfunctioning. Diagnostic alerts dated October 15–16, 2026, indicated Autosteer unavailable and adaptive-headlight failures. Autopilot becomes unavailable, nighttime visibility is affected, and software updates repeatedly stall at approximately 50%. On October 16, 2026, Service Mode showed a CRITICAL Secondary Autopilot ECU fault. Tesla Sterling subsequently identified computer reboot-loop faults and recommended approximately $2,700 in computer replacement without conclusively establishing whether software or hardware caused the failure. Tesla Tysons also reviewed vehicle logs but reported that existing faults prevented further remote diagnosis. An independent former Tesla technician indicated that typical computer failures can involve overheating or camera malfunctions. Neither symptom is present, and cameras function while parked. I am concerned that these safety-related failures may be associated with an incomplete software update. Tesla has been notified, but the root cause remains unresolved. The vehicle is available for inspection. I request that the federal safety agency investigate potential systemic software and Autopilot computer defects, examine similar complaints, and determine whether a safety recall or manufacturer-funded corrective action is warranted.

Filed Nov 6, 2026 · Driver assistance, Electrical · NJ

After installing a Tesla software update, my blind-spot warning and lane-departure warning systems stopped working. this can cause bad accident. I took my vehicle to Tesla Service, where I was informed that the car's computer was defective and needed to be replaced at a cost of $2,518, not including labor and diagnostic fees. I have never been involved in a collision, and my vehicle has not experienced any other issues that could explain this failure. Both safety features were working properly before the software update. I strongly believe this problem was caused by Tesla's software update, yet Tesla is refusing to take responsibility and is asking me to pay for the replacement computer, labor, and diagnostic charges. I find it unfair that I am being asked to pay thousands of dollars to fix a problem that appeared immediately after a Tesla software update. I believe Tesla should take responsibility and repair the issue at no cost to me.

Filed Oct 29, 2026 · Driver assistance, Electrical · CA

On XXX (4:59 PM and 5:47 PM) and XXX (7:49 AM), while driving, my 2021 Tesla Model Y (approx. 41,500 miles) displayed "Steering assist reduced" (UI_a020), each followed within about a minute by "Lane Departure Avoidance unavailable" (APP_w264). [Add if true: The steering felt noticeably heavier when the alert appeared.] The vehicle's 12V system tested healthy in Service Mode (13.32 V, DC-DC output normal). Tesla Service ([XXX]; service SV02F94980) diagnosed an Electronic Power Assisted Steering (EPAS) rack motor control error with limited power output from overheat or overload protection. On XXX, at 41,788 miles, Tesla replaced the steering gear (part 1188832-00-B), along with the front lower compliance and lateral links, and performed an alignment. I paid $4,522.27 out of pocket; Tesla declined goodwill. Losing power steering assist while driving is a safety hazard. The failed rack belongs to the same Mando-manufactured family (XXX) named in recall 25V‑092 and investigation EA24001, which covered only 2023 Model 3 and Model Y. the federal safety agency's complaint database shows a growing number of 2021 Model Y complaints describing the same UI_a020 alert and the same rack replacement, many filed in 2026. I ask the federal safety agency to evaluate whether the defect and remedy should extend to 2021 Model Y vehicles. Invoice attached. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 27, 2026 · Driver assistance, Visibility · CA

My 2021 Tesla Model Y (Autopilot Hardware 3) had a malfunction of its camera system and automatic windshield wipers after an over-the-air software update. The update was version 2026.38.5.1, which included FSD (Supervised) v14.3 Lite, and it installed on Oct 17. The vehicle had no problems with these systems before the update. After the update, the rearview camera did not display when shifting into reverse, the passenger side rear camera feeds stopped working, the automatic wipers did not activate in rain. Tesla’s automatic wipers depend on the vehicle’s cameras rather than a separate rain sensor, so both failures point to the camera or Autopilot computer system. Safety risk: Without a working rearview camera, I could not reliably see pedestrians, children, or objects behind the vehicle when reversing. Without working automatic wipers, visibility in rain depended entirely on manual control. Camera-dependent safety features such as automatic emergency braking and lane departure warning may also have been affected. The problem first appeared immediately after the 2026.38.5.1 update. I went to the Tesla service center and they are charging an exorbitant to even diagnose the issue ($265 per issue). Current status: On Oct 26, Tesla installed a newer update, 2026.38.5.11. However, the problem persists. The passenger side rear camera briefly worked before going dark again.

Filed Oct 23, 2026 · Driver assistance, Steering · TX · crash

On [XXX], between approximately [XXX] and [XXX] AM, I was driving my 2021 Tesla Model Y Long Range (VIN: [XXX]) with Full Self-Driving (Supervised) engaged, software version v14.3 Lite, on the southbound [XXX] frontage road at [XXX]. The road has five lanes in my direction, and only the leftmost lane is a left-turn lane. I was in the third lane from the left, and the navigation route required a left turn onto [XXX] at the upcoming intersection. FSD waited until the last moment to change lanes. The light turned red before it could complete the lane change, and the vehicle stopped straddling two lanes, still not in the left-turn lane. I expected FSD to continue straight and reroute. Instead, when the light turned green, the vehicle cut across the leftmost lane and drove up onto the median, apparently attempting to cross over it to complete the left turn. The other side of the median is oncoming traffic. There were two poles with city signs on the median, and the vehicle struck them. I took over immediately, but the collision had already occurred. No other vehicles or people were involved, and no one was injured. My vehicle sustained severe front-end damage, including a detached front bumper, a deformed left fender, and a shattered windshield. FSD/Autopilot features are no longer functioning. The vehicle did not automatically contact emergency services; I called the police myself. The incident was reported to the police (report #[XXX]) and to my insurance company, Progressive (claim #[XXX]). Tesla has contacted me to investigate. I have preserved the dashcam footage. Prior to this incident, I had also experienced repeated FSD issues after a software update in July 2026, including phantom braking and the vehicle suddenly stopping and freezing at intersections, requiring manual takeover. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 13, 2026 · Driver assistance · MD

While driving my Tesla on FSD mode, my Tesla had critical error and warn me to take over. My navigation and GPS froze. I did several reboot and power cycle and nothing worked. I reach out to Tesla and they stated that I will need a new computer hardware replacement. My Tesla was working fine until they push the new FSD lite software version 14.1 to Tesla vehicle with an incomparable hardware spec.

Filed Oct 6, 2026 · Driver assistance · CA · crash

On October 1, 2026 at approximately 7:55 PM, I was driving my 2021 Tesla Model Y with Autopilot/driver-assistance engaged. The vehicle struck a fixed support pole of the canopy at my driveway. The pole was stationary, but the vehicle did not avoid it. The collision caused significant damage to the vehicle and canopy/pole. I am concerned that the Tesla driver-assistance system failed to detect and/or respond appropriately to a stationary object while engaged. I am not aware of any warning or intervention that prevented the collision. I preserved the available TeslaCam/USB data and made a separate backup. I also have photographs and other documentation. I contacted Tesla and requested review of the vehicle logs, camera data, Autopilot/FSD data and diagnostic/event information. As of this complaint, I have not received a substantive response explaining the incident or confirming the driver-assistance system is safe to use. This is a serious safety concern. Children, including my grandchildren, are frequently present around this driveway, and I regularly transport my grandchildren in this vehicle. I am requesting that the federal safety agency investigate this incident and the performance of the driver-assistance system

Filed Oct 4, 2026 · Driver assistance, Electrical · PA

COMPONENT: The car computer (Tesla HW3 / "Full Self-Driving Computer 3," which houses the Autopilot computer and GPS) failed during a scheduled overnight over-the-air software update from version XXX in early XXX. The update failed to install, and from that point all cameras were black including the backup camera, navigation was frozen, and every driver-assistance feature was unavailable: Autopilot, FSD, automatic emergency braking, forward collision warning, lane keeping, and blind spot monitoring. The failed unit was returned to the owner and is available for inspection. SAFETY RISK: The vehicle remained drivable with crash-avoidance systems and the federally required backup camera disabled. The only indication was a camera-unavailable message; there was no clear warning that AEB and collision warning were off. The vehicle was driven about three weeks in this condition while awaiting parts. CONFIRMED BY MANUFACTURER: Yes. Tesla remote diagnosis determined the car computer required replacement. Tesla remotely cancelled and re-pushed the update on XXX; the download stalled at 0 B/s and never installed. Tesla Service in [XXX] replaced the car computer on XXX at owner expense ($2,489.48; outside basic warranty, goodwill declined). Tesla's repair notes state the loss of all camera images and Autopilot capability occurred "after a failed software update." PRIOR WARNINGS: None. No warning lamps or messages before the update; the vehicle operated normally on XXX Owner resets, power-off, and 12V disconnect did not restore function. ASSESSMENT: The Autopilot computer failed during a manufacturer-pushed software update. Owner forums and automotive press reported numerous similar HW3 computer failures in summer 2026 following Tesla software releases. No crash, fire, or injury. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 3, 2026 · Driver assistance, Electrical · MD

On October 1, 2026, immediately after my 2021 Tesla Model Y installed Tesla software update 2026.32.7, the driver-assist computer entered a continuous boot loop. All eight vehicle cameras went black (confirmed in the vehicle's Service Mode), the rear camera displays 'camera temporarily unavailable,' Autosteer will not engage, and the vehicle shows alert UI_a114 for degraded driving visualization. All camera-dependent driver-assist and safety features are inoperative. The vehicle had zero driver-assist or camera issues before the update. I performed a scroll-wheel reboot, a driver-assist system reset, and a full Service Mode software reinstall, none of which resolved the issue. Tesla's remote service diagnosed a 'hardware failure' of the Full Self-Driving computer and quoted $2,701.32 for replacement, without explaining how firmware corruption from their own update was ruled out. A manufacturer software update disabling all cameras and driver-assist safety systems is a safety defect.

Filed Sep 26, 2026 · Driver assistance, Electrical · CA

Shortly after I purchased and activated Tesla Full Self-Driving (Supervised), my vehicle's driver-assistance system stopped functioning. Autopilot and FSD became unavailable, the vehicle cameras stopped functioning properly, GPS/navigation positioning stopped functioning properly, and the vehicle could no longer communicate normally with the Driver Assistance System (DAS). Service Mode testing showed DAS Ethernet communication failure. I attempted multiple troubleshooting procedures, including vehicle reboots and resets. The low-voltage battery was also replaced, but the driver-assistance failure remained. I cancelled my FSD subscription on July 13, 2026 because the purchased feature was not functioning and sought assistance from Tesla. I subsequently had a Tesla Service appointment on July 16, 2026. Tesla advised that the Autopilot computer would need to be replaced and quoted approximately $3,000 for the repair/replacement. The failure occurred after the FSD purchase/activation and associated software changes. I am concerned that a Tesla software update or FSD-related software may have contributed to the HW3 Autopilot computer failure, but I do not know the definitive technical cause. This is a safety concern because multiple driver-assistance and camera-dependent functions became unavailable simultaneously. The vehicle is available for inspection. I am requesting that the federal safety agency review this failure and compare it with similar HW3/Autopilot computer failures reported by other Tesla owners.