*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Electrical system › 12v/24v/48v battery
The contact owns a 2026 Toyota BZ. The contact stated that while driving, the battery started overheating and the vehicle experienced a slight loss of automotive power. The messages "EV System Overheated - Output Power Reduced" and "Plug in Charging System Malfunction - Visit your Dealerâ were displayed. The vehicle was taken to a dealer where it was diagnosed, and the contact was informed that the failure was not duplicated. The manufacturer was notified of the failure. The failure mileage was 5,000.
Nov 2, 2025 · 5,000 milesElectrical system10 injuries
When I was driving the car when forward and suddleny heard a pop and I got a shocked and my car went a complete broke down I think EV broke down it almost caused me to get in accident and almost get killed
Oct 7, 2026Service brakesCrash
I was involved in an Accident on 9-19-26 as my car hit the car in front of me . I applied brakes however my car did not stop and the collision warning did not activate and the emergency braking system failed . Now my car is totaled and Iâm left paying Toyota the difference ! CAR IS DEFECTIVE Approximately 3000 miles
Sep 19, 2026Forward collision avoidance › Automatic emergency braking
The contact owns a 2026 Toyota BZ. The contact stated that while driving approximately 75 MPH and attempting to overtake a tractor trailer logging truck, the Forward Collision Avoidance Automatic Emergency Braking activated causing the vehicle abruptly decelerate. The failure was immediately self-corrected and the vehicle operated normally. During the failure the emergency braking warning light was illuminated. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 12,000.
Sep 29, 2026 · 12,000 milesVisibility › Defroster/defogger/hvac system
The contact owns a 2026 Toyota BZ. The contact stated that the air conditioning system was inoperable while starting the vehicle. The contact stated that while the air conditioning system was activated, the vents failed to blow air immediately. The failure was a recurring failure. The contact was affected by the loss of cool air in humid temperatures and was suffocating from the heat. The dealer was contacted and made aware of the failure. The failure mileage was approximately 1,000.
Sep 20, 2026 · 1,000 milesElectrical system
SUPPLEMENT TO ODI COMPLAINT 11758090 (filed 8/19/2026). Two corrections, an identified component, and a verified manufacturer remedy. Full narrative attached. CORRECTIONS. (1) The prior 12V battery was replaced 5/29/2026, not June 2026; invoice 569207 is correct. (2) The complaint attributed the drain to an armed charging schedule. That was a proxy, not the cause. The trigger is ANY vehicle wake -- key-fob approach at ~8 ft, end of drive, or converter pulse -- which arms a timer of exactly 180 minutes, after which a 0.87-0.9 A sawtooth discharge runs 4.6-9 hours, consuming up to 12 Ah. Verified 8 of 8 events 8/8-8/23/2026 by amp-hour shunt and independent voltage logger, one pre-registered…
May 16, 2026Electrical system
The 12-volt auxiliary battery system repeatedly discharges itself and has twice left the vehicle completely inoperative: 7/24/2026 (5.58 V at the battery, parked unplugged ~46 hours after the last drive) and 7/28/2026 (5.95 V, failure during an attempt to enter READY to drive). The 12V system controls the contactors connecting the high-voltage traction battery to the drive system; when it collapses the vehicle cannot be started or driven even though the traction pack holds charge. The dealer replaced the 12V battery under warranty in June 2026; failures continued, so the battery was not the cause. I instrumented the 12V system with two independent cross-validated meters (precision…
Jul 28, 2026Electrical system
The 12 volt battery exhibits a consistent parasitic drain. This is intermittent, but results in the vehicle failing to start. The failure to start is an issue because it is happening frequently and could endanger individuals who live in rural areas or areas with cold or hot climate. This issue has happened to us multiple times and Toyota has not recalled or provided guidance to its dealer service network. Many effected owners have a diagnostic data backed theory that links the drain on the 12 volt battery to Toyota digital communication module. That diagnostic can be found here. Toyota should be forced to investigate and fix this as it is a big safety concern for those who are in rural…
Jul 30, 2026
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.