2023 Lexus RZ 450ERecalls, problems, MPG & safety

“On Tuesday, July 14, 2026, my car experienced a sudden, catastrophic failure of braking system while in motion, at my home. I brought the vehicle into Lexus of Concord on Wednesday, July 15, 2026, . The power assist failed completely with zero advance warning, dropping the vehicle instantly into manual, unassisted braking and lighting up the dashboard with multiple system failures. Quite luckily, no bodily injury or additional vehicular damage resulted from this failure.The Diagnostic Trouble Codes the vehicle’s computer system logged were C13D900, on July 14, the brake booster code.The service report stated that the master cylinder which pumps the brake fluid to the wheels was leaking internally, causing the brake booster to fail. I was told replacing the brake booster and master cylinder assembly will correct the issue Part Number 47050-46040). According to the service technician, the diagnostic data did not indicate an internal electronic actuator failure or an internal fluid/pressure loss at that time.The trouble codes found C13D900 and B227862. The dealership did not open an official technical case with the Lexus Technical Assistance System (TAS) or a…”

“My vehicle, a 2023 Lexus RZ 450e, has been out of service for over 30 days due to an unresolved HVAC system failure affecting cabin heating. The issue significantly impacts the safe operation of the vehicle, particularly in cold weather conditions where adequate heat is necessary for driver visibility and occupant safety. Despite the vehicle remaining under the manufacturer’s warranty, the dealership has been unable to provide a diagnosis completion or estimated time of repair. The vehicle was brought in for service on February 20, 2026, and has remained at the dealership since that time. During this period, no clear resolution timeline has been provided, and communication from both the dealership and manufacturer has been limited to general status updates with no substantive progress. The lack of heating functionality raises safety concerns, especially given the vehicle’s reliance on electronic systems for climate control. A loaner vehicle has been provided; however, the extended delay without repair or replacement raises concerns about potential defects in the HVAC or related electrical systems. The inability to resolve the issue within a reasonable timeframe…”