2018 Volvo XC90 Problems

This submission supplements NHTSA Complaint #11759206, filed on August 24, 2026, regarding a 2018 Volvo XC90, in order to provide additional relevant information that came to light after the original filing. At the time of the first safety-critical malfunction (in-vehicle warnings including "Transmission Acceleration Performance Reduced" "Gear Lever Locked" and related electrical system symptoms), the service manager at Volvo Cars Brooklyn was able to remotely diagnose the likely cause by telephone, before the vehicle was even towed to the shop, specifically instructing the owner to check for dampness under the driver's floor mat, which was confirmed to be present. This indicates the symptom pattern described (sunroof leak leading to corrosion affecting the transmission, brakes, and electrical system) was already recognized and familiar to Volvo Cars Brooklyn's service staff, not a novel or difficult-to-diagnose issue. Additionally, the owner was informed that multiple other Volvo vehicles were present at Volvo Cars Brooklyn on the same day for repair of the same reported issue. Once arriving at the dealership, the service manager tole us that he had, "Just totaled a vehicle for the same issue." This suggests the underlying defect is not an isolated occurrence, but a broader, recurring pattern affecting multiple vehicles of this platform. This supplemental information is provided to support NHTSA's assessment of whether a safety-related defect trend exists affecting this vehicle platform, consistent with the pattern described in the original complaint and in other publicly available consumer complaints regarding sunroof-related water intrusion on the Volvo XC90.

The vehicle first experienced a safety-critical malfunction while driving on the highway on August 11, 2026, producing in-vehicle warnings reading "Transmission Acceleration Performance Reduced" and "Gear Lever Locked," along with broader electrical system symptoms, requiring the 2018 Volvo XC90 to be towed to Volvo Cars Brooklyn on August 11, 2026. At that time, dampness was discovered under the driver’s floor mat, leading to the discovery of a sunroof leak and resulting water intrusion. The dealership represented the vehicle as fully repaired and safe to drive. The same safety-critical malfunction occurred later that night, while driving about 90 miles away from the dealership, with the same warnings appearing, confirming that the original repair failed to address the underlying issue. Loss of normal transmission and braking function while the vehicle was in motion directly affected the driver's ability to control the vehicle. The vehicle was towed for a second time on the morning of August 12, 2026, to Volvo Cars Brooklyn, where it was confirmed that module corrosion caused by the original sunroof leak had not been properly diagnosed or corrected during the first service visit, and that this corrosion had disrupted signals to the vehicle’s electrical, braking, and transmission systems. The dealership completed a corrective repair on August 12, 2026, replacing the OFM module and removing water, following the second incident. The vehicle has not been separately inspected by Volvo’s manufacturer-level engineering team. This failure is consistent with a broader, documented pattern affecting this vehicle platform. Volvo has previously issued a Technical Service Bulletin addressing a sunroof-related water leak on an earlier model year of this platform. While that bulletin does not specifically cover the 2018 model year, numerous 2018 model year owners have independently reported the same failure pattern, a failed sunroof seal, often linked to clogged sunroof drains.

This submission supplements NHTSA Complaint #11759206, filed on August 24, 2026, regarding a 2018 Volvo XC90, in order to provide additional relevant information that came to light after the original filing. At the time of the first safety-critical malfunction (in-vehicle warnings including "Transmission Acceleration Performance Reduced" "Gear Lever Locked" and related electrical system symptoms), the service manager at Volvo Cars Brooklyn was able to remotely diagnose the likely cause by telephone, before the vehicle was even towed to the shop, specifically instructing the owner to check for dampness under the driver's floor mat, which was confirmed to be present. This indicates the symptom pattern described (sunroof leak leading to corrosion affecting the transmission, brakes, and electrical system) was already recognized and familiar to Volvo Cars Brooklyn's service staff, not a novel or difficult-to-diagnose issue. Additionally, the owner was informed that multiple other Volvo vehicles were present at Volvo Cars Brooklyn on the same day for repair of the same reported issue. Once arriving at the dealership, the service manager tole us that he had, "Just totaled a vehicle for the same issue." This suggests the underlying defect is not an isolated occurrence, but a broader, recurring pattern affecting multiple vehicles of this platform. This supplemental information is provided to support NHTSA's assessment of whether a safety-related defect trend exists affecting this vehicle platform, consistent with the pattern described in the original complaint and in other publicly available consumer complaints regarding sunroof-related water intrusion on the Volvo XC90.

The vehicle first experienced a safety-critical malfunction while driving on the highway on August 11, 2026, producing in-vehicle warnings reading "Transmission Acceleration Performance Reduced" and "Gear Lever Locked," along with broader electrical system symptoms, requiring the 2018 Volvo XC90 to be towed to Volvo Cars Brooklyn on August 11, 2026. At that time, dampness was discovered under the driver’s floor mat, leading to the discovery of a sunroof leak and resulting water intrusion. The dealership represented the vehicle as fully repaired and safe to drive. The same safety-critical malfunction occurred later that night, while driving about 90 miles away from the dealership, with the same warnings appearing, confirming that the original repair failed to address the underlying issue. Loss of normal transmission and braking function while the vehicle was in motion directly affected the driver's ability to control the vehicle. The vehicle was towed for a second time on the morning of August 12, 2026, to Volvo Cars Brooklyn, where it was confirmed that module corrosion caused by the original sunroof leak had not been properly diagnosed or corrected during the first service visit, and that this corrosion had disrupted signals to the vehicle’s electrical, braking, and transmission systems. The dealership completed a corrective repair on August 12, 2026, replacing the OFM module and removing water, following the second incident. The vehicle has not been separately inspected by Volvo’s manufacturer-level engineering team. This failure is consistent with a broader, documented pattern affecting this vehicle platform. Volvo has previously issued a Technical Service Bulletin addressing a sunroof-related water leak on an earlier model year of this platform. While that bulletin does not specifically cover the 2018 model year, numerous 2018 model year owners have independently reported the same failure pattern, a failed sunroof seal, often linked to clogged sunroof drains.

At approximately 6:30 PM, after normal driving and parking at a local park, our family was unloading children from the vehicle. One child was standing next to the vehicle while we removed a younger child from the rear seat. The child suddenly screamed and stated that he had burned himself. We later determined that he had accidentally come into contact with the exterior exhaust outlet. As we continued walking, we noticed the injury was more severe than initially believed. We took photographs of the burn and later sought medical evaluation. The physician determined that the injury was a second-degree burn due to blistering and provided treatment recommendations. The vehicle was operating normally, and there were no warning lights, messages, or signs of a malfunction before the incident. The concern is that the exposed exhaust outlet becomes hot enough during normal vehicle operation to cause a serious burn from brief accidental contact. We believe the location and accessibility of the exhaust outlet may present a burn hazard, especially to children during routine loading and unloading activities around the vehicle. The vehicle and photographs are available for inspection. The vehicle has not yet been inspected by the manufacturer or a dealer regarding this incident.

The vehicle engine will fail while driving. The electronics reflect the vehicle is still running. Restarting is not immediate and is difficult. This is a known problem that Volvo recalled for 2019/2020 XC90s. Volvo will not diagnose and repair under goodwill despite my repeated attempts.

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.

The engine coolant bleeder hose in my 2018 Volvo XC90 cracked in the middle of my journey causing a severe coolant leak. This happened in August of 2024 while driving and the engine coolant suddenly started showed warning with low level and the engine started overheating. The vehicle would not accelerate past 20 mph, and the temperature warning light flashed continuously, creating a safety hazard in traffic. The Volvo dealership diagnosed the issue and confirmed that the coolant bleeder on the supercharger is broken and leaking. They replaced the bleeder hose and vacuum fill system. I believe similar issues happened to the 2016 models and a recall was issued for the coolant bleeder hose (part # 32249907-0) to be replaced by Volvo. This has not been recalled for the 2018 models, making it an expensive replacement for me. I urge NHTSA to investigate Volvo XC90 coolant hoses for material defects, as this issue endangers drivers through unexpected breakdowns and engine failure.

This submission supplements NHTSA Complaint #11759206, filed on August 24, 2026, regarding a 2018 Volvo XC90, in order to provide additional relevant information that came to light after the original filing. At the time of the first safety-critical malfunction (in-vehicle warnings including "Transmission Acceleration Performance Reduced" "Gear Lever Locked" and related electrical system symptoms), the service manager at Volvo Cars Brooklyn was able to remotely diagnose the likely cause by telephone, before the vehicle was even towed to the shop, specifically instructing the owner to check for dampness under the driver's floor mat, which was confirmed to be present. This indicates the symptom pattern described (sunroof leak leading to corrosion affecting the transmission, brakes, and electrical system) was already recognized and familiar to Volvo Cars Brooklyn's service staff, not a novel or difficult-to-diagnose issue. Additionally, the owner was informed that multiple other Volvo vehicles were present at Volvo Cars Brooklyn on the same day for repair of the same reported issue. Once arriving at the dealership, the service manager tole us that he had, "Just totaled a vehicle for the same issue." This suggests the underlying defect is not an isolated occurrence, but a broader, recurring pattern affecting multiple vehicles of this platform. This supplemental information is provided to support NHTSA's assessment of whether a safety-related defect trend exists affecting this vehicle platform, consistent with the pattern described in the original complaint and in other publicly available consumer complaints regarding sunroof-related water intrusion on the Volvo XC90.

The vehicle first experienced a safety-critical malfunction while driving on the highway on August 11, 2026, producing in-vehicle warnings reading "Transmission Acceleration Performance Reduced" and "Gear Lever Locked," along with broader electrical system symptoms, requiring the 2018 Volvo XC90 to be towed to Volvo Cars Brooklyn on August 11, 2026. At that time, dampness was discovered under the driver’s floor mat, leading to the discovery of a sunroof leak and resulting water intrusion. The dealership represented the vehicle as fully repaired and safe to drive. The same safety-critical malfunction occurred later that night, while driving about 90 miles away from the dealership, with the same warnings appearing, confirming that the original repair failed to address the underlying issue. Loss of normal transmission and braking function while the vehicle was in motion directly affected the driver's ability to control the vehicle. The vehicle was towed for a second time on the morning of August 12, 2026, to Volvo Cars Brooklyn, where it was confirmed that module corrosion caused by the original sunroof leak had not been properly diagnosed or corrected during the first service visit, and that this corrosion had disrupted signals to the vehicle’s electrical, braking, and transmission systems. The dealership completed a corrective repair on August 12, 2026, replacing the OFM module and removing water, following the second incident. The vehicle has not been separately inspected by Volvo’s manufacturer-level engineering team. This failure is consistent with a broader, documented pattern affecting this vehicle platform. Volvo has previously issued a Technical Service Bulletin addressing a sunroof-related water leak on an earlier model year of this platform. While that bulletin does not specifically cover the 2018 model year, numerous 2018 model year owners have independently reported the same failure pattern, a failed sunroof seal, often linked to clogged sunroof drains.

The contact owns a 2018 Volvo XC90. The contact stated that the A/C unit failed to operate as needed, causing the HVAC system to become inoperable. The vehicle was taken to a dealer where a diagnostic test was performed, which showed that the evaporator core inside the HVAC system was cracked and needed to be replaced. The contact attempted to have the part replaced; however, the contact was informed that the part was on backorder. The vehicle was not repaired. The manufacturer was notified of the failure but offered no assistance. The failure mileage was 100,000.

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.

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.

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

Rear Drivers door (left) fails to latch. Volvo has an updated part for better water ingress prevention, then the part that was used to build the car. The problem is that water enters the moveable window, runs down the metal channel separation gthe fixed and moveable window, and enters the door latch mechanism. This is extremely dangerous, in that the door may appear closed, and the vehicle may allow the driver to move forward or backward, but the door is not latched and can fly open leading to death! This is an issue known by Volvo, hence the updated OEM replacement part, however they are grossly negligent in not reporting or self recalling vehicles for this issue.

At random times the back doors will not open, from the inside or outside…hit all the unlock buttons and will NOT open. If this is not a massive safety issue, I don’t know what is…. If we get in a wreck and our car is on fire and we cannot instantly get ourselves or our children out quickly that’s a problem… if we wreck on the freeway and we see vehicles coming at us and we cannot quickly exit. This is a problem. For a car company to not address this it is gross negligence… we own a Ford focus it’s been taken in about three times for door recalls, but we never even actually had an issue…Volvo being a luxury car company and choosing to ignore this issue at the expense of the consumer has went on too long! This hasn’t happened only once, has happened sporadically multiple times

My 2018 Volvo XC90 had repeated water leakage from the panoramic sunroof. In most cases, when the vehicle is parked flat or the front is at a slight angle, water leaks in and collects in the cargo area. It collects into a plastic compartment over the battery located on the right side of the cargo area and/or on top of the rear cargo mat. When the vehicle is moving and it is raining, water leaks in from the rearview mirror, making the entire dash, screen, shifter and both driver and passenger wet. The rain also comes in from the rear right side of the second row making the entire seat or any passenger sitting there wet. Volvo is not acknowledging this defect nor are there any solutions in place. This is extremely concerning.

The secondary hood latch release cable is not functioning, preventing the hood from opening. Thousands of owners complaining about that. There is a Volvo Service Bulletin Action but they are pretending to charge for that. Quality bulletin service action: S89651 What can I do?

At first I was having issues with stop and start, replaced the battery then was told I wasted coffee in my center Console and it cause electrical issues and was told the repairs would be 3,400 in which collision issuance paid for. After the repairs my driver side seat belt would latch then the passenger side wouldn’t latch either so I currently don’t have working A/C or working seatbelts which is known problem for these vehicles.

2ND row, center seat, seatbelt lock will not work, will not latch/lock, cannot use seatbelt. Since owning car, the seatbelt locked intermittently, as of today, it does not work at all.

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.

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.

PROBLEMS WITH THE AIR IS THE TIRES. THAT IS THE MOST SEVER PROBLEM WITH THE TIRES. THE AIR IN THE TIRES WORK ON COMPARING THE AIR IN TIRES. IF ONE IS LOW IT SHOWS WHICH ONE IS LOW. I HAVE HAD TO REPLACE A TIRE.

ERROR MESSAGE SHOWED ON THE INSTRUMENT PANEL, ' HEADLAMP SYSTEM MALFUNCTION, SERVICE REQUIRED', HOWEVER THE LIGHT WORKS BUT BACKUP CAMERA STOP WORKING. IT ALSO SHOWS ANOTHER ERROR MESSAGE 'CITY SAFETY SYSTEM UNAVAILABLE'. ASK THE DEALER AND THEY SAID IT IS AN SOFTWARE ISSUE. FIXED AFTER THE SOFTWARE UPGRADE.

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