2019 Toyota Avalon Electrical System

The contact owns a 2019 Toyota Avalon. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized. The contact stated that a good Samaritan attempted to start the vehicle, but the vehicle failed to restart. The contact waited for thirty minutes and stated that while attempting to start the vehicle, the vehicle restarted. The vehicle was taken directly to the dealer. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. In addition, the contact stated that the vehicle had previously experienced several failures since July 2025. The contact stated that the vehicle was taken to the dealer several times, and the oxygen sensor, the oil light sensor, the ignition coils, and the fuel pump extension were replaced. The contact stated that the vehicle had caused the contact anxiety, and the contact was fearful of driving the vehicle. In addition, the contact stated was fearful for her and her grandchildren's safety while in the vehicle. The manufacturer was made aware of the failure, and a case was filed. The contact stated that several cases were filed, and all were denied. The failure mileage was approximately 46,000.

When starting the vehicle, an extremely high pitched noise is emitted from the speakers. This high pitch seems like its comes out full volume out the speakers. Ear piercing noise leaves my ears ringing every time.

After troubleshooting, the issue with my car cannot communicate with my mobile app through Toyota remote connect, cannot update vehicle software, and after a $130 diagnostic fee, the dealer states the DCM module is bad and needs replacing. My question is this is a safety issue, correct?

THIS VEHICLES BLIND SPOT MONITOR ON THE PASSENGER SIDE IS NOT OPERATIONAL AND DOES NOT SHOW VEHICLES IN THE BLIND SPOT ON THE MIRROR OVER 70% OF THE TIME GIVING THE DRIVER A FALSE SENSE THE LANE IS CLEAR. IT APPEARS THE SYSTEM GETS WORSE THE LONGER YOU DRIVE AND ALMOST NO USABLE WHEN DRIVING OVER 40 MILES. THE DRIVER SIDE BLIND SPOT MONITOR SYSTEM WORKS AS IT SHOULD. UPON SOME RESEARCH ON LINE, IT APPEARS THIS IS A COMMON ISSUE AND TOYOTA INDICATES IT WORKS TO SPECS, BUT BASED OFF THE FACTORY MANUAL DOES NOT.

TL* THE CONTACT OWNS A 2019 TOYOTA AVALON. WHILE DRIVING VARIOUS SPEEDS IN STOP AND GO TRAFFIC, THE ACCELERATOR PEDAL WAS APPLIED, BUT THE VEHICLE HESITATED AND SPONTANEOUSLY ACCELERATED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO TOYOTA OF CEDAR PARK (5600 183A, LEANDER, TX 78641, (512) 379-7575) WHERE IT WAS DIAGNOSED THAT THE SOFTWARE NEEDED TO BE UPDATED, BUT STATED THAT THE VEHICLE WAS PERFORMING AS DESIGNED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBER: 1904010349. THE MANUFACTURER ADVISED THE CONTACT TO CALL THE LOCAL DEALER. THE FAILURE MILEAGE WAS 3,500.

REPORTED THIS TO DEALER. THEY COULDN'T FIND ANYTHING WRONG AT THE TIME. KEEPS HAPPENING : BLIND SPOT MONITORING AND CROSS TRAFFIC ALERT MALFUNCTION ALERTS