2023 LEXUS RX Electrical System Problems

The 2023 Lexus RX-350 has had complete 12 volt battery failure twice in the last year. The hybrid battery charging procedure for the 12 volt battery is insufficient. Twice I have been stranded. The frequency and duration of the hybrid battery charging is not sufficient. A more powerful 12 volt AGM battery is needed. The dealer says I am not taking sufficiently long trips to charge the battery. Last Saturday I took two 30 - 40 minute trips but the battery had only 11.8 volts requiring a 100% charge. There should be a recall to fix this problem.

If we don't drive the car for 4 or 5 days, especially in cold weather, the car will sometimes not start due to a drained 12V battery. We've spoken to Lexus of Rockville, MD and Lexus roadside assistance, who are aware of the issue but say the 12V battery is "healthy." Online research shows this is a widespread known issue with Lexus RX350h and RX500h vehicles from 2023 onward: [XXX] [XXX] . A simple software update to ensure that the high-voltage hybrid battery charges the 12V battery to a greater extent when the vehicle is parked should solve the problem, but Lexus has so far not addressed this problem. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On at least 7 occasions the driver was TRAPPED inside the vehicle. The car failed to start and the doors and windows locked. If the driver had not had a cell phone to make an emergency call he would have been locked inside until someone discovered the problem. Had this happened in Phoenix, AZ in the summer, there is a very good chance the driver would have been dead before he was rescued. The last time was December 11, 2025. We replaced the starter battery for 2nd time in 2 years and 40K miles.

The car battery goes dead when car not used in 14days, or not driven on freeway long enough to top off battery. We've had to jump it for being in a cool garage for a couple of days, and the battery is only 2yrs old. The car needs a stronger battery.

The contact owns a 2023 Lexus RX500H. The contact stated while depressing the brake pedal, the vehicle surged forward. There were no warning lights illuminated. The vehicle was taken to the dealer who was unable to determine the cause of the failure. The contact stated that the failure persisted. The vehicle was taken to another dealer, Lexus of Santa Fe (6824 Cerrillos Rd, Santa Fe, NM 87507) who were unable to determine the cause of the failure. The contact stated that the failure persisted. While the contact’s wife was driving and was idling at a stop light, the vehicle lunged forward aggressively. The contact’s wife turned off the vehicle to avoid lunging forward and crashing with oncoming vehicles at the intersection. The vehicle was returned to the first dealer, Lexus of Albuquerque (4821 Pan American Fwy, Albuquerque, NM 87109) who was able to duplicate the failure and stated that the...

The contact owns a 2023 Lexus RX350. The contact stated that while driving at an undisclosed speed, a system malfunction error message populated on the instrument panel. The vehicle was taken to a dealer, where the system was reset. The dealer advised the contact that the error message could populate again and that a software fix was being worked on. The contact stated that the failure reoccurred. The manufacturer was made aware of the failure. The failure mileage was approximately 9,000.