Table 1 shows two common back over prevention related problems of the 2021 Toyota Sienna.
| Problem Category | Number of Problems |
|---|---|
| Rearview System Braking problems | |
| Warnings problems |
1. The vehicle displayed the rear cross traffic alert (rcta) warning light along with the blind spot monitoring (bsm) warning light on the dash board. The vehicle was brought to Toyota of ann arbor for an inspection. After inspecting the vehicle, Toyota of ann arbor reported that road debris (snow, dirt, mud, etc. ) was trapped between the bumper and the sensor resulting in the sensor to malfunction. The vehicle has been taken through a car wash with an underbody wash option, but due to the position of the sensor, the sensor is not able to be cleaned from a car wash. The sensor can only be cleaned by removing the bumper. But when the bumper is removed, the sensors have to be re-calibrated and the re-calibration of the sensors can only be completed by trained professionals. 2. Due to the malfunctioning sensor, the driver's safety is put at risk by not being alerted of obstructions (both objects or persons) behind the vehicle, nor oncoming cross traffic, nor detecting vehicles in blind spots. This could cause collisions or worse, fatality, due to the malfunction sensor not alerting the driver. 3. This vehicle has been able to reproduced the problem multiple times and as mentioned above, the vehicle was inspected and confirmed by the Toyota of ann arbor dealership. The dealership (Toyota of ann arbor) mentioned that there are multiple reports of this issue on other vehicles of the same make and model. 4. The vehicle or component has not been inspected by the manufacturer, police, insurance representative, or others. 5. No prior symptoms were seen or displayed prior to the failure.
Pulling into paved parking spot on very slight uphill grade. Tried to apply brake pedal but car kept moving forward about 6ft over curb and crashed into cement wall creating slow speed impact damage to front end. Towed on flat bed to dealers lot. Tow truck driver noted brake seemed loose and had little resistance. Car still under warranty, 28. 8k mi, all warranty required maintenance has been performed to date by dealer. No prior accidents. Annunciation on screen after event saying "parking support brake malfunction visit your dealer" message has subsequently remained. Large number of same or similar annunciation messages over last 4 yrs reported on Toyota nation web site. Messages indicate that TSB-019-19 may apply and/or dtc c13b0. However, service manager at dealer has refused to investigate this and similar diagnostics to explain safety systems failure or otherwise repair under warranty agreement, unless we first sign a release for personal injury liability with Toyota legal department. Dealer has advised it is not safe to drive car in its present condition. Please note similar complaint sent a few days ago on this web site (no response so far) but there was an error in reported VIN so this is a resend.