*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Suspension
The 2023 Toyota Prius Prime features fixed, non-adjustable rear suspension geometry. My vehicle arrived from the factory with the Right Rear Camber out of specification (-2.2°, max spec limit is -2.0°). Because the rear camber is non-adjustable and cannot be corrected, it caused rapid, unseen inner tread wear down to the steel cords by 20,000 miles, creating a severe tire blowout risk. Authorized Toyota dealership Ourisman Fairfax Toyota inspected the vehicle under RO #6195543/1 and verified that the camber is out of spec and that there is NO external physical damage to the suspension. Toyota Corporate closed my case and refused to address or reimburse the defect under the 3yr/36k Basic…
Aug 17, 2026Electrical system
The vehicle exhibits an unaddressed factory programming defect where the Plug-In Charge Control ECU fails to enter sleep mode while plugged in or resting. This causes continuous, heavy parasitic drain on the 12V auxiliary battery, causing chronic low-voltage state across critical systems. The 12V auxiliary network supplies power to the primary control units, CAN-bus communication modules, and dynamic stability systems. Operating under chronic low-voltage causes system instability, erratic sensor processing, voltage brownouts, and rapid degradation of the 12V battery. In severe traffic or isolated operations, a depleted 12V battery creates a distinct safety hazard, including sudden loss of…
Aug 10, 2026Electrical system
My 2023 Prius Prime cannot be charged normally in hot weather without triggering a thermal-protection fault on its high-voltage charging system. Avondale Toyota diagnosed it in writing: "CODE P1CE996 CHARGER COOLING FAN REVOLUTION SENSOR COMPONENT INTERNAL FAILURE. THE ELECTRIC CHARGER ASSEMBLY HAS A INTERNAL OPEN CIRCUIT CAUSING IT TO BE INOP. RECOMMEND REPLACEMENT ADD PN# G9090-47061." Quote: $2,516.99 plus ~$200 diagnostic. The vehicle cannot verify its high-voltage charger's cooling fan is operating. In Phoenix heat (100F+), normal charging repeatedly sets the fault and check engine light. I verified by controlled testing: reduced-current charging in cool hours avoids the fault, but any…
Jun 5, 2026Electrical system
There is an unexplained loss of 12V power from the 12V battery, and the car will not start. This was reported to the local Toyota dealership on 12/5/25. The car had to be jumped in order to drive it to the dealership/service department. They said the 12V battery was fully charged when they inspected it and there was no parasitic drain on the the battery. They inspected the battery again on 12/30/25 during a routine scheduled service and the 12V battery was good. We have since experienced the inability to start the car on the following dates: 1/10/2026, 2/5/2026, 2/20/2026, 2/22/2026, 2/23/2026. On each of the before mentioned incidents that car had to be jumped by an auxiliary battery pack…
Feb 23, 2026Latches/locks/linkages › Fueling/charging door/hatch/port
The contact owns a 2023 Toyota Prius Prime. The contact stated that upon approaching the vehicle after it had been parked and turned off in the garage, the contact noticed that the hatch door was opened. The contact stated that upon pressing the power button on the hatch and the hatch door power button inside the cabin to close the hatch door, the hatch door failed to close. The manufacturer was notified of the failure and advised the contact to call Roadside Assistance. The contact called Toyota Roadside Assistance who advised the contact to attempt to close the hatch manually. The contact was able to close the hatch door manually. The dealer was not notified of the failure. The vehicle…
Jan 29, 2025 · 7,920 milesExterior lighting
The contact owns a 2023 Toyota Prius Prime. The contact stated while driving 40 MPH with the headlights activated, the low-beam headlights were not providing adequate illumination to light the sides of the roadway properly. The contact stated that shadows were projected to the side of the road from the headlights. The contact had taken the vehicle to a dealer who diagnosed the vehicle and determined that the headlight housing was causing the low beams to be partially shaded. The dealer was informed that when the high beam headlight was activated, the light from the headlight was not casting shadows and the side of the road was lit. The vehicle was not repaired. The manufacturer was informed…
Jun 16, 2023 · 9,176 miles
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
