On two separate occasions, while driving car on highway at high speed, the car has gone into a special shutdown mode, where a turtle icon lights up on the dash and the car begins to shut itself down rapidly, limiting maximum speed of vehicle to 35mph. There is no warning or advanced alert. Suddenly the car reduces speed and feels like it is dead, and the systems begin to alert you that they are going into a reduced function mode. This was extremely scary thing to happen at highway speeds with flowing traffic. I had to crawl to side of rose at very low speeds. I could have been injured. I took the car to dealer for service and they said it was a software issue. A few months after, this happened yet again, also while at highway speeds. I have read that others are having similar issues with the Volvo XC90 model. This is so dangerous and the dealerships are writing it off as a software matter! It is extremely dangerous.

Source: NHTSA complaint ODI #11511651 · view all complaints for this vehicle at nhtsa.gov

The vehicle’s Start/Stop system began displaying warning messages and malfunctioning prior to the expiration of the factory warranty. The issue first appeared before 50,000 miles and reappeared at 49,997 miles, when a warning was displayed on the dashboard. The vehicle was taken to an authorized dealer for inspection. A diagnostic review confirmed the need to replace the Start/Stop auxiliary battery and repair the Park Assist system. A diagnostic fee was charged, and both system failures were documented. The Start/Stop system’s failure raises a potential safety concern because the vehicle may not reliably restart after automatically stopping at intersections or in traffic. This could lead to dangerous situations if the vehicle stalls unexpectedly or fails to re-engage power at a critical moment. Although the issue has not caused a crash or injury, it introduces unpredictable behavior that could compromise safe operation. The Park Assist system also failed, triggering system warnings and disabling parking assistance features. If a driver is relying on these systems during low-speed maneuvers, a sudden or silent failure may increase the risk of collision with objects, pedestrians, or other vehicles. The dealership confirmed the problem through inspection and diagnostic testing. The manufacturer was contacted and declined to cover the repairs under warranty, despite the vehicle being within the mileage limit when the issue was first documented and presented for service.

Source: NHTSA complaint ODI #11678085 · view all complaints for this vehicle at nhtsa.gov

The brakes did not work when the automatic emergency braking turned on. When I pressed the brakes all the way down, the brakes didn’t respond because it was still in automatic mode. I was able to swerve into the next lane to not hit the vehicle in front of me. The automatic emergency braking also turned on when I was reversing from a parked location when there was a vehicle waiting to park behind me and my vehicle stoped and didn’t come off of brake/park mode. I had to turn my vehicle on and off again to get it to move again. I have taken my vehicle in twice for shaking. My back rotors were replaced 2 weeks ago but my vehicle still shakes. This car only has around 21,000 miles to have so many issues already with rotors and shaking.

Source: NHTSA complaint ODI #11613402 · view all complaints for this vehicle at nhtsa.gov

Vehicle steer violently on pilot assist and powertrain disabled, not allowing us to steer the wheel on a highway. (Last year) We were lucky no other cars were nearby, needed a reboot for the wheels to work again. Dealership isn’t sure what happened. Now we have a hybrid system failure which a lot of cars with the same model Xc90 T8 is having with the hybrid system. Please investigate into this

Source: NHTSA complaint ODI #11611104 · view all complaints for this vehicle at nhtsa.gov

Heat does not work in Hybrid Vehicle. Prevents windshield from being able to be defrosted in winter. Should be covered under warranty, however when I took it to the dealer they report that multiple Volvo have this problem and there is a part shortage. Because of this problem, the vehicle is unsafe to drive the vehicle in the winter because it won't generate enough heat to melt the snow and ice that hits the windshield.

Source: NHTSA complaint ODI #11564107 · view all complaints for this vehicle at nhtsa.gov