2018 Tesla Model 3 driver assistance problems

Filed Nov 5, 2026 · Acceleration, Driver assistance · CA

2018 Tesla Model 3, VIN [XXX]. Rear-right ABS wheel speed sensor failed 3–4 days after Tesla Burbank replaced it on XXX (invoice XXX). First alerts XXX (ABS disabled, Drive with caution, TPMS). Failure confirmed XXX (AEB unavailable). Returned from vacation XXX; Tesla replaced same part again (invoice XXX $167.76). Tesla notes state only that sensor “was cut”; no animal damage recorded.I photographed the failed sensor XXX. It shows a single clean angled cut through the black jacket with conductor and red insulation on the same flat face. No tooth marks, scalloped bites, shredded insulation, or nesting material — a shear, not rodent damage.Service Manager [XXX] first blamed a rabbit, then wrote it “was an example” and that Tesla does not need droppings, nesting, or chew marks to call a severed harness outside damage. He has no photos from the 8/18 install; the tech is on leave. Two emails to [XXX] went unanswered. Related BAR complaint filed (ref XXX).Rear wheel speed sensor feeds ABS, traction control, and Automatic Emergency Braking. Failure disables these safety systems. A part that fails days after Tesla service with an undocumented “cut,” followed by a warranty denial based on inference rather than evidence, indicates possible workmanship or installation issues that could affect other vehicles. Requesting the federal safety agency review of Tesla’s service practices for this component.Tesla Service Burbank, [XXX], [XXX]. [XXX], [XXX].[XXX], [XXX], [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 27, 2026 · Driver assistance · TX

Following Tesla's over-the-air deployment of FSD 14.1 Lite, the HW3 Autopilot computer in my 2018 Tesla Model 3 failed. FSD / Autopilot worked normally before the update and stopped working immediately afterward. Tesla Service diagnosed the vehicle XXX and verified the alerts APP_W207, APP_W462, APS_W182, APS_W188 and APS_W185. The technician attempted hard and soft resets and a firmware reinstall, and verified power and ground to the car computer. All attempts failed. The technician's notes state the secondary autopilot processor is no longer communicating and "a new car computer is needed." The failure has disabled Automatic Emergency Braking, Forward Collision Warning and Lane Departure Warning, as well as FSD / Autopilot. Tesla denied a goodwill replacement in writing on XXX, stating there was no evidence linking the failure to a software update, after the technician confirmed the computer had failed. Tesla provided a written estimate for the replacement of $2,616.37 total (invoice dated XXX). I have not authorized the repair. Tesla also confirmed in writing that my vehicle is not currently eligible for the HW4 upgrade. I sent a formal Notice of Dispute to Tesla at [XXX] on XXX and received no response; I sent a follow-up on XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 21, 2026 · Acceleration, Driver assistance · IL · crash

While driving, the vehicle suddenly accelerated on its own and began operating without my control. Despite my attempts to steer away from surrounding traffic, the vehicle continued to self‑propel, crossed the median, and entered oncoming lanes, resulting in a head‑on collision with another car.

Filed Sep 25, 2026 · Body, Driver assistance · CA

Possible ineffective recall remedy – the federal safety agency Recall 21V-00D / Tesla SB-21-17-008. My Model 3 received the trunk harness recall remedy in 2023. Tesla inspected the original harness, determined it was within specification, left it installed, and added the guide protector. Tesla’s recall documentation states the guide is intended to prevent further wear caused by trunk movement; if wear is beyond specification, the harness is replaced. In 2026, my rearview camera began intermittently failing. I found that I can reproduce the failure by operating the trunk and provided Tesla video evidence. Tesla has now diagnosed an internal fault in the same original trunk harness and says the harness requires replacement. This appears consistent with the safety condition addressed by 21V-00D: repeated trunk movement can damage the harness/coaxial cable and cause loss of the rearview camera. I repeatedly asked Tesla what diagnostic evidence shows this is a different failure mechanism. Tesla has not identified one. Instead, Tesla has repeatedly stated that it considers this separate because approximately 3 years have passed since the recall remedy. I asked whether this three-year distinction comes from a the federal safety agency requirement or written Tesla policy; Tesla could not identify one. My concern is that vehicles considered successfully remedied by retaining the original harness and installing the guide may remain susceptible to the recalled failure after additional trunk-use cycles. Original harness retained → recall guide installed → continued trunk use → internal harness fault → rearview-camera failure. I am reporting this so the federal safety agency can evaluate whether this represents a potential durability/effectiveness issue with the 21V-00D guide-protector remedy and whether similar post-remedy failures are occurring in other affected vehicles. Tesla correspondence and service documentation are attached.

Filed Aug 20, 2026 · Driver assistance · NY · crash · 1 injury

Adaptive cruise control was on, i was driving on the highway, traffic was speeding up and slowing down, and the tesla was braking accordingly. I was paying attention to the road and noticed, all of a sudden, that the tesla was not braking as traffic in front of us slowed. I immediately slammed my foot on the brake as hard as i could, yet there wasn't enough time or distance, and my car collided with the one in front of me. I wasn't injured, but there's a chance someone in the other car was. The emergency brake did not kick in whatsoever, and the adaptive cruise control completely failed, leading to an accident.

Filed Aug 16, 2026 · Driver assistance · MA

After Tesla pushed software update 2026.20.6.11 or “FSD 14 lite” the self driving feature stopped functioning. Also all of the driver assistance safety features stopped working at the same time, forward collision warning, emergency braking, lane keeping assist, adaptive cruise control, blind spot detection have all stopped working as well. It appears one of the two “self Driving” ECU was damaged or disabled by the update. Without these features the drive is not notified in advance of a collision and the emergency braking does not function to stop the car. The car is awaiting inspection and repair by the manufacturer.

Filed Aug 5, 2026 · Driver assistance · CA

I getting the Tesla phantom braking almost every week.

Filed May 29, 2026 · Driver assistance, Electrical · TN

It showed message that emergency brakes not available. It was related to wire hardness inside the trunk lid. I had to get it replaced. Tesla did not cover it.

Filed May 3, 2026 · Driver assistance · CA

Safety Issue: Defective interior cabin camera causes Tesla Full Self-Driving (FSD) to disengage abruptly and without adequate warning at freeway speeds. I am a [XXX] driver. I purchased FSD capability with this vehicle in December 2018. In October 2025, I had the FSD hardware upgrade (HW2.5 to HW3) installed at Tesla's Encinitas, CA service center (B.A.R. License [XXX] ). Within days, FSD would became completely unusable due to a recurring "Cabin camera unavailable — schedule service" alert that instantly disengages the system. The disengagement occurs on the freeway at highway speed, without meaningful advance warning. As a [XXX] driver, the sudden loud alarm and loss of assisted driving is genuinely alarming — it is not immediately clear in the moment whether the vehicle has lost power or experienced a critical failure. This is exactly the kind of dangerous situation driver assistance systems should prevent, not cause. Tesla's own diagnostic confirmed the defect (Diagnostic Invoice No. XXX, November 27, 2025, Encinitas service center): "Cabin camera unavailable" alert verified Intermittent stream exit faults detected in the selfie/cabin camera Low-voltage circuit and wiring checks were normal — ruling out wiring Conclusion: fault is within the camera module itself; technician recommended replacement The defect is FSD-specific. The cabin camera works correctly for Sentry Mode, live security viewing, and all normal driving. It fails exclusively when FSD is engaged and demands sustained driver monitoring. The camera housing also becomes extremely hot to the touch during FSD use, consistent with reports from other 2018 Model 3 owners describing identical symptoms after their HW3 retrofits. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 27, 2026 · Driver assistance · IA

When using FSD in "chill" mode the car attempted to cross over into oncoming lane on a two lane highway. There were no oncoming cars and I overrode the car almost immediately. The car has not been inspected by anybody. No warning light, messages or other symptoms. I have a video of the incident for a Viofo dashcam installed in the car.