2026 Lexus RX Electrical system Problems

“While driving my 2026 Lexus RX350h, the vehicle suddenly lost propulsion and would not respond to the accelerator. After coming to a stop, pressing the gas pedal did nothing. I had to shift to Park, press the brake, and press the Start button to get the vehicle moving again. A short time later, while making a right turn, the vehicle lost power again while still moving, forcing me to repeat the Park–Brake–Start sequence in the middle of the turn. This is a serious safety issue because the hybrid system appears to shut down unexpectedly, causing loss of propulsion in traffic. …”

“Technical Incident Timeline Suspected Unintended Acceleration Event 2026 Lexus RX 350h Premium+ (Approximately 96 Miles) Vehicle: 2026 Lexus RX 350h Premium+ Purchase Date: July 10, 2026 Dealer: Woodfield Lexus Incident Date: July 12, 2026 Approximate Time: 11:30 AM Vehicle Mileage at Incident: Approximately 96 miles ⸻ Event Sequence 1. Vehicle Startup * I entered the vehicle and started the vehicle normally. * The vehicle was in Park (P) at startup. * My right foot was on the brake pedal, as required to start the vehicle. * The accelerator pedal was not intentionally pressed. 2. …”

“2026 Lexus RX 350h Luxury AWD Hybrid. Component Affected: ELECTRICAL SYSTEM:12V BATTERY, DIGITAL/ELECTRONIC LOCKS I am experiencing a severe and persistent 12V parasitic battery drain on my 2026 Lexus RX 350h. The vehicle's auxiliary 12V battery drains completely to a dead state if left parked and unused for only two to three days. This is an ongoing manufacturing or software defect that prevents the auxiliary battery from maintaining an adequate charge, resulting in routine vehicle failure. Safety Risks and Incidents: This parasitic drain introduces several critical safety hazards: 1. …”

“The contact owns a 2026 Lexus RX 450h+. The contact stated that while occupying the vehicle, the battery lost power, causing the power door locks to fail to disengage and leaving the contact trapped inside the vehicle. Approximately 15 minutes later, the contact located the manual emergency release, unlocked the door, and exited the vehicle. The dealer was contacted and informed the contact of the manual emergency door release. The following day, the vehicle failed to start. The vehicle was towed to the dealer, but was not diagnosed or repaired. …”

“The 12-V battery of a brand-new Lexus RX450h+ died suddenly without any warning, only about 5 weeks into regular driving, with ~120 miles on the odometer. Lexus Roadside Assistance was called in to jump-start the battery, and the vehicle was driven directly to the dealership (about 5 miles away) for service. The dealership service checked the battery and indicated it “passed” all tests and is in good condition. However, the service technicians could not identify or suggest any reason for such a sudden death of virtually a brand-new battery (5-week new, 120-mile usage). …”