2020 VOLVO XC40 Engine Problems

SUPPLEMENTAL INFORMATION FOR ODI#11708898. I am providing additional documentation to this ODI case. I had to create a new complaint since there appears to be no way on-line to add this information. Gunther Volvo has not provided ANY status updates of my vehicle which has been in their possession since Sunday, January 4, 2026. The Director of Customer Experience, Nyam Smith had not responded to my email sent on 1/4/2026. Volvo Customer Care had assigned a case # for towing and for the safety incident but both the dealership and Volvo Customer Care have been unresponsive. I did not receive responses to my texts to the dealership asking for any updates, and Nyam Smith said in an email that I needed to get any updates from Volvo Customer Care. I called them to get an update but Pablo had no update and said he had to call the dealer! The...

On 01/04/2026, while operating a gas-powered 2024 Volvo XC40, the vehicle experienced a catastrophic Sudden Unintended Acceleration (SUA) event while stationary at a red light. With the service brake fully depressed, the internal combustion engine began to surge and rev uncontrollably, making loud noises. The engine torque increased in direct response to increased brake pressure, eventually overcoming the braking system and forcing the vehicle forward into the 3-way intersection. Technical Details: Brake-Throttle Override (BTO) Failure: The vehicle’s safety logic failed to prioritize the brake signal over the uncommanded throttle increase. Shifter Interlock Malfunction: During the surge, the electronic gear selector was unresponsive, preventing shifting into Neutral (N) to disconnect power. Shifting capability only returned once the vehicle was brought to a forced stop. Prior Symptoms: Intermittent "idle flaring" and surging were noted 48 hours prior to the failure. Safety Risk: The vehicle moved into traffic against my intent and physical...