2018 Volvo XC90 Electrical Problems

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

NHTSA ID

11746058

Incident

Jun 20, 2026

My 2018 Volvo XC90 T8 Plug-In Hybrid experienced a catastrophic, premature component failure of the Electric Rear Axle Drive (ERAD) propulsion system while driving. The ERAD unit suffered a total failure of internal bearings and sensors, completely disabling the electric rear wheel propulsion system and suddenly forcing the vehicle into a reduced-power "limp mode" on the road. This sudden loss of hybrid propulsion creates an immediate highway safety hazard, removing expected acceleration and vehicle control in traffic. Volvo has documented this exact engineering flaw internally under Technical Journal TJ 36665, recognizing a manufacturing vulnerability in these specific hybrid components. However, the manufacturer is refusing to provide remedy or financial cost-sharing to repair this vital propulsion and safety defect, leaving a hazardous, compromised vehicle on the road.

NHTSA ID

11744495

Incident

May 15, 2026

2018 Volvo XC90, VIN [XXX] , 54,618 miles. Original owner. All service performed exclusively at Volvo Cars West Houston (same dealer, all three failures). Volvo Technical Journal TJ 34648.1.2, titled "Prior Approval - Lack of airflow causing poor cabin cooling," is classified as a Product Fix and explicitly lists the 2018 XC90 as an affected vehicle. This TJ required the dealer to submit a Prior Approval report to Volvo Corporate when installing the resistor fix. At 12,017 miles (August 2020), the dealer installed the evaporator resistor per TJ 34648.1.2, Part No. 32241228, under VST Operation 98734-2 — meaning Volvo Corporate has documentation of this vehicle's evaporator vulnerability on file since 2020. At 15,930 miles (March 2021), the AC compressor failed and was replaced under warranty, consistent with refrigerant starvation from the same underlying evaporator leak. The evaporator has now failed completely at 54,618 miles despite Volvo's own corrective measure being applied at 12,017 miles. The current failure (April 2026) includes a confirmed front evaporator refrigerant leak and AC discharge hose leak, documented by dealer borescope inspection showing corrosion on the evaporator fins and visual evidence of refrigerant oil residue at the discharge hose fitting. Dealer repair estimate is $4,406. This is a documented pattern failure across 2016-2018 Volvo XC90 models. Volvo Cars USA was contacted for goodwill assistance and denied the request within 24 hours without meaningful review. Case number [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11730540

Incident

Apr 3, 2026

3 weeks ago we had the transmission module fail on our vehicle while it was being driven. According to Volvo forums, this is a multi-model year, multi vehicle issue for those with sunroofs. Accrding to the dealer in our case, the seal failed, and water runs into the compartment where the transmission module is located, causing it to fail. We had it happen twice, and both times on the highway, with the engine running ragged causing it ot accelerate and then quickly decelerate. There were 3 warnings that popped up-"Gear lever locked," "transmission acceleration performance reduced," and "Parking Brake unaavialble." It happened twice and and was towed to the dealer both times, as it was not drivable-once the vehicle was parked it would no longer move out of park. The first time the diagnosis and module reset was comped by the dealer (Borton Volvo, Golden Valley, MN) and the second time, the transmission module was "dried out," and the sunroof seal was replaced, which was just under $700. It is available to be inspected if necessary. The vehicle was a hazard to others on the road while it was "acting up." Dealer was familia with the issue. No inspection was done other than by the dealer Warning lamps as outlined above

NHTSA ID

11676768

Incident

Jul 9, 2025

While actively driving into an intersection, driving on the street and or stopped at a light or at a stop the vehicle will shut off, the lights on the dashboard will sometimes be on, other times go completely black, a notification pops up on the dashboard saying "engine not in P". There is no way I'm aware of to re create this action. My children's safety as well as mine has been put at significant risk and in harms way as well as others due to the severity and nature of this unexpected risk while driving on the freeway, through intersections and in general driving through traffic and busy streets. I've had multiple close calls of almost being hit when the car stopped while I'm driving with my children. The problem has yet to be reproduced by the dealer at this time however we have photos and video of it's ongoing safety concern. It has not been inspected by the manufacturer nor police but is currently at the dealer undergoing inspection. There has not been any notifications or warnings prior to any one of these serious events, the message only comes up when the car is off and won't go.

NHTSA ID

11657576

Incident

Apr 26, 2025

This morning and a few days ago, ice cold water was dripping onto my control display pad and on me. The leakage came from the ourside down the plastic compartment behind my rearview mirror. This was distracting while I was driving since there was now water on me, and it was shorting out and affecting my control display. It would continue to be buggy while driving. I believe this issue is a result from a cracked seal between the windshield and the car body. I have seen other documented cases on volvo forums.

NHTSA ID

11602688

Incident

Jul 16, 2024

The contact owns a 2018 Volvo XC90. The contact stated that after coming to a stop at a stop signal, the vehicle lost motive power. The contact stated that the vehicle was able to restart; however, the failure recurred. The vehicle failed to restart, and no warning lights were illuminated. The vehicle was taken to a local dealer, where it was diagnosed that the starter motor fuse needed to be replaced. The vehicle remained at the dealer awaiting the parts for the repair. The manufacturer was made aware of the failure. The approximate failure mileage was 101,000.

NHTSA ID

11509748

Incident

Feb 19, 2023

Mileage

101,000 mi

The car starting leaking water into the rear view mirror in June. This wouldn’t be much of an issue, but the cars computer system for drive assist is located in this area and has caused the car to malfunction in all areas. This XC90 pilot assist is now malfunctioning causing a huge safety issue. This is apparently a known problem with their cars with the panoramic sunroof, but is now a safety hazard. The Volvo dealership did not fix the issue and is now happening again effecting all of the electrical system.

NHTSA ID

11499816

Incident

Jan 2, 2023

WHEN THE CAR IS PARKED, I UNLOCK THE DRIVER'S DOOR, THE TAILGATE OPENS ON IT'S OWN (POSSIBLY INTO TRAFFIC) THEN AFTERWARDS, EVERY TIME WHEN STARTING THE CAR, A "12V BATTERY CHARGING FAULT STOP SAFELY" ERROR OCCURS TWICE. IT SEEMS TO BE OK TO DRIVE, BUT IT IS NOT CLEAR AS TO WHETHER THE FAULT CAN CAUSE A SAFETY ISSUE, AS THE MESSAGE IMPLIES. SO MANY OF THE SYSTEMS IN THE CAR ARE ELECTRIC. THIS IS A REOCCURRING PROBLEM THAT HAS HAPPENED 4 TIMES NOW, AND VOLVO HAS NOT BEEN ABLE TO FIX IT.

NHTSA ID

11256252

Incident

Sep 17, 2019

Mileage

21,000 mi

I PURCHASED MY 2018 VOLVO XC90 T6 AWD (HEREINAFTER, THE '2018 XC90' OR 'THE VEHICLE') IN OCTOBER 2017, THROUGH LEASE AGREEMENT. SHORTLY THEREAFTER, I NOTICED THAT THE FUEL EFFICIENCY OF THE VEHICLE WAS WELL BELOW THE EPA RATING AND WARRANTED RANGE, BASED ON REPRESENTATIONS BY THE DEALER AT, AND PRIOR TO, THE TIME OF SALE. I TOOK THE VEHICLE TO THE DEALER'S SERVICE DEPARTMENT, SO THE ISSUE COULD BE INVESTIGATED FURTHER. THE DEALER REPORTED THERE WAS A SOFTWARE UPDATE THAT ADDRESSED THE PROBLEM, AND THAT IT WOULD NO LONGER BE AN ISSUE. SUBSEQUENTLY, THE ISSUE CONTINUED TO RE-APPEAR AND THE FUEL EFFICIENTLY CONTINUED TO SUFFER. I AGAIN, ON NUMEROUS OCCASIONS (BETWEEN 5 OR 6) BETWEEN DECEMBER 2017 AND NOVEMBER 2018, TOOK THE VEHICLE TO THE DEALER'S SERVICE DEPARTMENT. IN EACH OCCURRENCE, EXCEPT THE FINAL ONE PRIOR TO THIS COMPLAINT BEING FILED, IT WAS AGAIN REPORTED THAT NO ISSUE EXISTED OR HAD BEEN REMEDIED WITH A SOFTWARE FIX. FURTHERMORE, IN (OR AROUND) JULY OF THIS YEAR, THE COMPRESSOR (OR ANOTHER COMPONENT CONTROLLING THE HVAC SYSTEM IN THE 2018 XC90) FAILED, WHILST DRIVING TO HOUSTON, TEXAS. THE HEAT INSIDE THE VEHICLE QUICKLY RAISED. THIS PART WAS REPLACED IN HOUSTON. IN OCTOBER 2018, I AGAIN, FINALLY, TOOK THE 2018 XC90 TO THE SERVICE DEPARTMENT BECAUSE (1) THE CHECK ENGINE LIGHT CAME ON; AND (2) THE ELECTRONIC SAFETY SYSTEMS, SUCH AS THE AUTO BRAKING, HAD AUTOMATICALLY ENGAGED WITHOUT ANY CARS AROUND THE VEHICLE. THE VEHICLE WAS ALSO DRIVING AND HANDLING IN A STRANGE MANNER. FUEL EFFICIENCY WAS AGAIN A CONCERN. THE SERVICE DEPARTMENT HAD THE VEHICLE FOR APPROX. TWO-AND-A-HALF WEEKS. THEY, ULTIMATELY, DETERMINED THE FUEL PARTS, WERE DEFECTIVE. THEY REPLACED THESE PARTS AND NOTED IT WOULD BE RESPONSIBLE FOR ALL PRIOR FUEL ISSUES. HOWEVER, THEY ALSO STATED A RECALL WAS ISSUED, BUT MY VEHICLE WAS NOT ON THE LIST. NO RECALL NOTICE EXISTS WITH THE NHTSA.

NHTSA ID

11152941

Incident

Nov 19, 2018

Mileage

11,500 mi

WE HAVE OWNED OUR XC90 SINCE NOVEMBER 11, 2017. THE BRAKES WERE SQUEALING WHEN BRAKING IN NORMAL CONDITION(S), NO RAIN ON ROAD OR WATER ON BRAKES WHETHER WE WERE DRIVING ON CITY STREETS, HIGHWAYS OR FREEWAYS. VOLVO SERVICE TECHNICIANS HAD TO REPLACE ALL 4 ROTORS AND BRAKE PADS ON 30 MARCH 2018, JUST A LITTLE OVER 4 MONTHS OF OWNING THE VEHICLE. FOUR MONTHS LATER 8 AUGUST 2018, VOLVO SERVICE TECHNICIANS HAD TO REPLACE ALL 4 ROTORS AGAIN, BUT NOT THE BRAKE PADS. THERE IS NEARLY 25,000 MILES ON THIS CAR, WHICH NORMALLY ROTORS AREN'T TYPICALLY REPLACED UP TO 70,000 MILES. I UNDERSTAND THIS VARIES BASED ON DRIVING BUT TWICE IN 8 MONTHS FOR ALL 4 ROTORS IS INSANE. THEY ALSO FOUND ALL FOUR ROTORS EACH TIME WERE WARPED. WE OWNED A 2012 VOLVO XC60 FOR 5 YEARS AND NEVER HAD THE BRAKES OR ROTORS REPLACED DURING THAT ENTIRE TIME. SECONDLY A GRINDING SOUND IS COMING FROM THE SUNSHADE WHEN IT IS BEING OPENED OR CLOSED. OUR VEHICLE HAS BEEN IN THE SHOP SINCE 14 AUGUST 2018 WHERE THEY REPLACED THE SUNSHADE, ONLY TO HAVE TO REPLACE IT AGAIN 21 AUGUST 2018. WE WENT TO PICK UP THE VEHICLE AND THE GRINDING SOUND IS BACK AGAIN, WHICH NOW VOLVO WILL HAVE TO REPLACE THE SUNSHADE FOR A THIRD TIME. I AM A VOLVO CUSTOMER FOR LIFE, BUT THESE ISSUES NEED TO BE ADDRESSED AND FIXED FOR FUTURE MODELS. I AM THANKFUL FOR THE COURTESY VEHICLE DURING THIS TIME, BUT I REALLY WANT MY VEHICLE BACK. I ASSUME MY NEXT COURSE OF ACTION IF WE GET THE VEHICLE BACK A THIRD TIME WITH A DEFECTIVE SUNSHADE OR BRAKES IS LEMON LAW.

NHTSA ID

11121658

Incident

Aug 8, 2018

Mileage

25,000 mi

BRAKES CONTINOUSLY SQUEAK. THE DEALER HAS INSPECTED THE BREAK SYSTEM TWICE AND MADE ONE ATTEMPTED REPAIR. ONE WEEK LATER THE BRAKES ARE BACKING TO SQUEAKING. I HAVE OWNED THE VEHICLE LESS THAN 90 DAYS, I'VE HAD ISSUES WITH THE BRAKES FOR MORE THAN HALF THAT TIME. THE CENTER DISPLAY COMPUTER SCREENS FREEZES CONSTANTLY, BUT RECENTLY FREEZES AND WILL NOT RESTART UNTIL AFTER THE CAR IS STOPPED AND RESTARTED.

NHTSA ID

11056836

Incident

Dec 26, 2017

Mileage

3,400 mi