Volvo XC90 brake failure problems

Filed Jul 7, 2026 · Brakes · CO

VIN: [XXX] •Make/Model/Year: 2018 Volvo XC90 •Mileage at time of each incident (58,385 / 58,480 / 68,261) •Approximate dates of each incident Vehicle has experienced recurring brake system failures. First, a seized rear brake caliper (Sept 2025) requiring caliper/rotor/pad replacement. Four days later, brake pedal became stiff and hard to depress; brake booster diagnosed as internally failed and replaced. Approximately 9 months and 9,800 miles later, vehicle experienced complete loss of braking ability while driving — brake pedal would not stop the vehicle, driver had to use the parking brake to stop, vehicle was towed to dealer. All repairs performed at authorized Volvo dealer. This is a repeat failure of the same brake system after a documented repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 23, 2026 · Airbags, Brakes · TX · crash

I am reporting a serious safety concern involving a 2018 Volvo XC90 T8 PHEV. On [XXX], at approximately [XXX] CT, the vehicle experienced a sudden multi-system safety and actual brake failure while in a parking-lot/low-speed setting near [XXX} in Austin, Texas. The vehicle displayed multiple urgent warning messages and indicators, including power steering failure / stop safely, brake/ABS warning, SRS airbag service urgent warning, stability/traction warning, battery/electrical warning, check-engine warning, and tire-pressure warning. The vehicle ended in an irregular/distressed parking position after trying to locate a concrete block to force stop the car due to ABSOLUTE BRAKE FAILURE, E BRAKE SEEMED TO NOT WORK EITHER. The concern is not simply that a warning light appeared. The event involved steering, braking, airbag/SRS, stability, and electrical warnings at the same time, making the vehicle unsafe to operate AND SOMEHOW THE BRAKES WEREN’T OPERATING DUE TO THE LACK OF FUNCITONING. Photos were taken of the warning messages and vehicle position. Prior related history:
This vehicle has prior safety-system history involving SRS Airbag Service Urgent warnings and braking/vehicle malfunction and movement concerns. Earlier review and discussion involved Volvo engineering, VDDM replacement, CAN/network concerns, calibration requirements, voltage/12V battery considerations, software/module updates, and post-repair validation. The VDDM is understood to participate in vehicle dynamics, stability control, brake coordination, and PHEV regenerative/hydraulic brake interaction. Prior documentation also raised concern that intermittent brake, SRS, VDDM, CAN, and calibration issues may not reproduce during a short dealer test drive. Safety risk:
The safety risk is that the vehicle may experience sudden or intermittent loss, degradation, or warning of systems involved in steering, braking, stability control, and airbag readiness. A simultaneous power steeri INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA

Filed Apr 22, 2026 · Brakes, Driver assistance · MD

While driving, I experienced a sudden loss of braking assist with no warning. The brake pedal became extremely hard to press, accompanied by a hissing/air sound. Despite applying full pressure, the vehicle did not slow as expected and continued moving. At one point, after stopping, the vehicle began to move forward again while my foot remained firmly on the brake. The issue occurred immediately upon or shortly after starting the vehicle, with no prior warning indicators. This created a serious safety hazard.

Filed Apr 17, 2026 · Brakes · MD

My Volvo's XC90 brakes have failed twice. At around 95,000 miles, my brakes stopped working, and then I had them repair it. They charged me close to $3,500, which they said they were able to cover under warranty, and I only had to pay the deductible, which I don't remember. In less than nine months, at about 104,000 miles, the same problem persists. Both times I was driving the car, by God's grace and luckily, I was under 10 mph. I literally parked and started driving after that, and I realized the brakes weren't working again. I'm just thankful to the Almighty that I was not at 55 or 60 mph on a freeway when the brake stopped working.

Filed Mar 18, 2026 · Brakes · TN

I am writing to report a serious safety concern related to a recent over-the-air software update for my 2025 Volvo XC90. On March 10, 2026, I was prompted to install a software update and scheduled it to complete overnight. The following morning, the vehicle interface indicated that the update had been successfully completed. Additionally, during a routine service visit on March 12, 2026, dealership personnel also believed the update had been properly installed. However, on March 15, 2026, while driving, I experienced a critical and dangerous failure: my brakes became unresponsive, and I was unable to stop the vehicle using the brake pedal. Multiple warning lights appeared simultaneously. Fortunately, I was near my home and was able to safely bring the vehicle to a stop by coasting through nearby streets. This situation could have resulted in a catastrophic accident had it occurred on a highway or in heavy traffic, particularly as my daughter was in the vehicle at the time. The vehicle was subsequently towed to the dealership. I was informed that during the initial installation attempt, the battery voltage dropped below the required level, causing the update to pause. Critically, I received no notification that the update had failed or was incomplete, and the vehicle interface continued to indicate that the update had been successfully installed. Upon inspection on March 16, 2026, the dealership determined that the software update resumed and completed installation on March 15—while I was actively operating the vehicle. At that time, the vehicle lost communication with its electronic systems, resulting in the loss of braking functionality. This sequence of events raises a significant safety concern. A software update that can pause due to low battery voltage and later resume without any notification—particularly while the vehicle is in operation—creates an unacceptable risk to drivers, passengers, and the public.

Filed Feb 13, 2026 · Brakes · PA

Vehicle: 2020 Volvo XC90 Mileage at first incident: ~60,000 miles Mileage at second incident: ~70,000 miles In July 2025, while my wife was driving our 2020 Volvo XC90 the vehicle experienced a sudden and complete loss of braking. The brake pedal did not provide stopping power, and the vehicle had to be steered off the roadway in order to come to a stop and avoid a serious accident. The incident created a serious safety risk. The vehicle was taken to an Wynn Volvo PA dealer and the brake booster and master cylinder were replaced at our expense (approximately $2,500). After the repair, the brake pedal initially felt abnormally soft and required a return visit for correct repair. Approximately six months later, in January 2026, while my teenage son was driving the same vehicle, the vehicle again experienced a complete loss of braking. Braking performance was lost without warning. He narrowly avoided a serious accident. The vehicle was brought to Wynn Volvo in PA and the hydraulic control unit (brake control module) was diagnosed as failed. Repair cost is approximately $3,000. This vehicle has now experienced two separate complete brake failures involving different hydraulic braking components within six months -- with both my wife and son narrowly avoiding serious accidents. Given that this is a safety-critical braking system failure with repeat occurrence, I am filing this complaint for investigation.

Filed Nov 14, 2025 · Brakes · MD

On November 5, 2025, while driving my 2017 Volvo XC90, I experienced a sudden and dangerous loss of braking assist. When I pressed the brake pedal, I heard a loud hissing noise coming from under the dashboard, and the car would not stop. The brake would not work and the vehicle would not slow or stop unless I stood up and used my full body weight to press it. A licensed mechanic inspected the vehicle and confirmed this is consistent with loss of vacuum pressure from the brake booster/failure of the vacuum brake booster, the component that provides power assist to the braking system. The booster, brake pump, hose from booster to pump and brake pedal clip were replaced, with an estimated cost of $2,858. The mechanic also advised that this failure is not uncommon in Volvo XC90 models. After the incident, I researched similar complaints and found numerous reports on the federal safety agency and [XXX] describing **identical symptoms—hard brake pedal and hissing sound due to vacuum booster failure—**in the 2016–2019 XC90. For example, one owner reported “hard pedal, no assist, hissing sound behind dash” [XXX] , Volvo XC90 2017 Brakes section, accessed Nov 2025). No warning lights or error messages appeared before or during the event. The problem occurred suddenly and without prior symptoms. This defect posed a serious safety risk to me, my passengers, and other drivers, as it severely reduced braking ability and required excessive force to stop the vehicle. Under other conditions, this issue could easily have resulted in a crash. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 22, 2025 · Brakes · NC

While driving, the brakes completely failed without any warning. There were no signs, alerts, or symptoms prior to the failure. The braking ability was suddenly and entirely lost, creating an extremely dangerous situation. Upon inspection, it was determined that the brake booster had failed. This component failure directly caused the complete loss of braking power. Because this occurred without warning or prior indication and such an unexpected failure not only poses a significant safety risk to the driver and passengers but endangers everyone on the road, and it represents a severe safety hazard. A sudden brake booster failure can easily lead to loss of vehicle control, accidents, injury, or even fatalities. Immediate action is required to address this serious issue that threatens public safety.

Filed Feb 16, 2025 · Brakes · FL

Complete brake failure. Vehicle would no slow at all. Brake failure warning on dash. Now multitude of warnings.

Filed Sep 9, 2024 · Brakes, Driver assistance · CT

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.