2026 Lexus Rz

The contact owns a 2026 Lexus RZ 450. The contact stated that while the vehicle was parked in the garage, the vehicle failed to start. The dealer jump-started the vehicle and the vehicle was towed to the service center, where it was determined that a module had failed and the battery was replaced. However, the contact felt unsafe driving the vehicle. The manufacturer was made aware of the failure. The failure mileage was approximately 1,500.

NHTSA ID

11761545

Incident

Aug 1, 2026

Mileage

1,500 mi

The contact owns a 2026 Lexus RZ-450E. The contact stated that while the vehicle was parked and attempting to start the vehicle, the driver’s side door failed to respond. No warning light was illuminated. A dealer was contacted. The vehicle was taken to dealer, and the contact was informed that the data communication module had drained the battery and needed to be replaced. The dealer updated the software and the vehicle was repaired. The contact stated that the failure had occurred approximately twelve times with the driver’s side door. The manufacturer was notified of the failure and informed the contact that the dealer could replace the data communication module only after a software update was performed. The contact stated that the failure had occurred on two separate occasions. The approximate failure mileage was 1,000.

NHTSA ID

11757473

Incident

Jul 15, 2026

Mileage

1,000 mi

Went to my car on Saturday @630p to put items in my car for church the next morning. I couldn't get into my car and my car wasn't responding to my key fobs. I called the Lexus service and was closed. I got on my app and called roadside service. As I was walking (pacing) in my garage, I noticed my rear passenger tire was flat! I asked the AAA rep about my tire. He said no replacement was in my car and the tire isn't inflated with air, but foam. Additionally, he noted me not driving the car may have drained my battery. Which was about 73% last I drove it. When he looked at my car and jumped it, he noted my 2nd battery was drained. He didn't know why. He had me leave the car running for an hour after he left. I did and the car turned off automatically after 1 hour. I called both the service department at your location and AAA on Monday morning. On Monday 8/10/2026, I got the car towed and called Gabb6 at the service center. Upon further review, the SOS button is malfunctioning and is killing my battery. Tuesday 8/11/2026, tire will be replaced but there is no solution for the malfunction other than disconnecting the SOS feature, which is a safety hazard in case anything happens. I understand there are multiple vehicles at this moment at the dealership with this issue. This should be recalled as if families with small children or citizens have an issue and connect get to their phones, the SOS feature should be functional.

NHTSA ID

11756176

Incident

Aug 8, 2026

Incident one: I was locked out of my car and needed to call Lexus roadside assistance for help. The technician struggled with the mechanical override to open the car, but was able to force it eventually. He explained the 12V battery was dead. There was nothing left on that would have drained the battery. Incident two: The following week, I was able to enter the vehicle and turn it partially on but was not able to drive the car and after I turned off the power, I was trapped in the vehicle. Lexus roadside assistance came again and jump-started the 12V battery. I left it at the dealership behind another brand new Lexus RZ with the same issue!

NHTSA ID

11756071

Incident

Aug 10, 2026

This a new 2026 electric car with an~80% charge in the traction battery. Unfortunately the 12 V battery failed after I got into the car and closed the car door. Nothing on the car worked including the door locks leaving me trapped. Fortunately I had my phone with me so I could call for assistance. I shudder to think if I had not or if my grand kids had been playing in the car while we weren’t around. . In talking to Lexus roadside assistance something similar had occurred in south Florida that required a 911 call to save the guy inside. This is a serious problem.

NHTSA ID

11755442

Incident

Aug 4, 2026

The Component Affected: Electrical System / Drivetrain Propulsion. The Core Hazard: Systemic software/hardware defect causing a total failure of the 12V auxiliary system, resulting in immediate vehicle blackouts and leaving the vehicle stranded without warning. The Safety Risk: The vehicle leaves passengers and young children completely stranded in high-traffic or unsafe environments. Note that this platform is heavily affected by the active June 18, 2026 electrical system shutdown recall (NHTSA Campaign Number: 26V393), and the unresolved 12V parasitic battery loops present an ongoing safety risk of sudden power loss. The Timeline: State that the vehicle has suffered three consecutive electrical dropouts in less than 2,147 miles, with the first failure documented by a dealer battery replacement at just 12 miles.

NHTSA ID

11748880

Incident

Jul 1, 2026

Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream+ (GTS+) ECU flash reprogramming procedures and outlines the use of the Technical Information System (TIS) and the Calibration Update Wizard+ (CUW+). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU initializes the flash reprogramming sequence.

A new head unit software update (version 2300) is available via OTA or USB for 2022 – 2026 model year LX 600, NX 250, NX 350, and NX 350h; 2023 model year LS 500; 2023 – 2024 model year UX 250h; 2023 – 2025 model year ES 250, ES 300h, ES 350, LS 500h, RZ 300e, and RZ 450e; 2023 – 2026 model year RX 350, RX 350h, and RX 500h; 2024 – 2026 model year GX 550, LC 500, LC 500c, LC 500h, LS 500, RX 450h+, TX 350, TX 500h, and TX 550h+; 2025 model year UX 300h; 2025 – 2026 model year LX 700h; 2026 model year IS 350, RZ 350e, RZ 450e, and RZ 550e vehicles equipped with Lexus Multimedia versions older than 2300. This Software Update includes the following improvements: •User Interface •Cloud Navigation •Bug fixes Vehicle operators can perform this update directly by accepting the on-screen notification advising that the software update is available, or by locating the software update from the Settings menu and initiating the available update. The release message below will be displayed to the customer: “This software update includes improvements for User Interface, Cloud Navigation, and Bug fixes.” If it is necessary to perform the software update for a customer, follow the software update procedures in this bulletin. This is a phased rollout, which means that as time progresses, more vehicles will receive the update notification and ability to update the head unit. This timing will vary by location and may not display for every vehicle in one location at the same day/time.

Some 2026 model year RZ 350e, RZ 450e, and RZ 550e vehicles may exhibit the Diagnostic Trouble Code (DTC) U25521F associated with the level 3 DC fast charging. Under certain conditions, charging may either operate normally or experience failure, with a charging malfunction message displayed on the Multi-Information Display (MID). This condition is attributed to a control logic issue and potential voltage drop affecting Plug-In Charge Control Computer Assembly functionality. The control logic has been modified to reduce the possibility of this condition.

State of Health (SOH): An estimate of battery health that is updated as the vehicle learns from operating and charging conditions over time. Distance Since Last Update: Indicates the distance accumulated since the last SOH calculation. A default mileage value of 40,727 at SOH 100% may be displayed until sufficient vehicle learning is completed. Once SOH value updates from 100%, the Distance Since Last Update value will re-set to 0 miles. Both SOH and Distance Since Last Update values will continue to update as the vehicle continues to learn.

Some 2026 model year RZ 350e, RZ 450e, and RZ 550e vehicles may exhibit the Diagnostic Trouble Code (DTC) U255221F associated with the level 3 DC fast charging. Under certain conditions, charging may either operate normally or experience failure, with a charging malfunction message displayed on the Multi-Information Display (MID). This condition is attributed to a control logic issue and potential voltage drop affecting Plug-In Charge Control Computer Assembly functionality. The control logic has been modified to reduce the possibility of this condition.

OBSOLETE NOTICE Month ##, 2026: This bulletin is now obsolete. Please see L-SB-0018-26