2019 Subaru Ascent Electrical Problems

All the safety systems become disabled and check Engine light goes on because transmission fluid is being pumped Out of a faulty secondary pressure sensor part 31878aa020,( defective and replaced with 31878aa021), into the engines wiring at the car computer, transmission computer, and bulkhead connector in fuse box causing all sorts of engine codes. The setting of the engine code closes all the vehicles driver safety systems and changes the dynamic of the drivers driving experience. As the problem gets worse, it can render the car powerless on roads and highways making operation dangerous. I have my car parked in front of the house with the battery and electrical connectors unplugged. This problem is covered by one or more recalls and safety campaigns, but subaru refuses to fix mine and other peoples that I found on Facebook. Someone online listed a $6500.00 repair estimate. They just had it repossessed instead. This part causes the pressure differences that cause the jerky ride and is specifically alluded to in the recall, plus subaru even changed the part because it was defective.

NHTSA ID

11755268

Incident

Jul 28, 2026

NHTSA Vehicle Safety Complaint Vehicle: 2019 Subaru Ascent VIN: [XXX] Mileage: 72,093 miles I am submitting this complaint because my 2019 Subaru Ascent experienced a serious transmission-related electrical failure that may represent a broader safety defect. Sewell Subaru of Dallas diagnosed an internal failure of a transmission pressure sensor. According to the dealership’s written report, the failed pressure sensor allowed transmission fluid to leak into the electrical wiring harness. The transmission fluid then migrated through the wiring and into the bulkhead harness. The dealership advised that the fluid contamination had affected multiple parts of the vehicle’s electrical system and recommended replacement of the transmission wiring harness, engine wiring harness, bulkhead harness, Engine Control Module (ECM), Transmission Control Module (TCM), and related components. Because the wiring harnesses are routed throughout the engine compartment and vehicle, the repair also requires extensive disassembly of the vehicle, including disconnecting and removing numerous engine compartment components to access and replace the contaminated harnesses. The estimated repair cost was approximately $12,000. I also have video documentation of the dealership technician performing the inspection and explaining the transmission fluid contamination and migration through the wiring system. I am willing to provide the video, the dealership's written diagnosis, repair estimate, photographs, and any additional supporting documentation upon request. My vehicle falls within the published VIN range associated with Subaru recall WUV-07, which involved the CVT hydraulic pressure sensor harness and transmission hydraulic pressure system. That recall was later superseded by WRK-21. I understand that the published recall addresses electrical resistance and transmission hydraulic pressure readings rather than transmission fluid leakage. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11754232

Incident

Jul 28, 2026

The battery is draining so quick that the car doesnt start at all. The battery drained completely in 3 days and it’s happening more often.

NHTSA ID

11681026

Incident

Aug 15, 2025

I have a 2019 Subaru Ascent Limited model with 96,xxx miles as of January 2025. In 2023, there was a safety recall for the PTC heater ground bolt sent first class mail for multiple year Ascent models. This recall was completed by local subaru dealership on 3/27/2023 stating "WRL 22 completed. Removed ground bolts and cleaned threads. Found no signs of heat damage. Removed and replaced bolts." Move forward to Saturday, [XXX]. I remote started vehicle from inside the house while on vacation in Bristol Tennesee. Car was running for roughly 5 minutes, when fire alarms inside the house starting going off. Seemed odd considering nothing was going on inside. Walked inside to see large amounts of white smoke coming from the windows of the Ascent. I was able to jump into the car and turn the engine off. I opened all 4 doors to let the car air out. I checked the engine, nothing seemed off. I then turned my attention to the air cabin filter, everything seemed normal as well. After the engine cooled and aired out, there is smoke damage to the vehicle. I was able to transport the car safely to Wallace Subaru which was less than 0.25 mile from our airbnb. I was quickly notified by the service technician that the car is not safe to drive until it was fixed. After further investigation, it was found that the PTC ground bolt has failed again, and this time melting the wiring harness and bolt around it. This was right next to the carpet and put my life as well as my wife, who is [XXX] and my [XXX] daughter. Thankfully we weren't in the vehicle when this occurred. There was no warning. No check engine light, nothing. No other issues leading into the incident. Car is still parked in Bristol TN at the dealership and I am 5 hours away in Lexington KY. Subaru has been uncooperative with this situation and is avoiding talking to me or making this situation better. I literally have no answers. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11638826

Incident

Jan 18, 2025

STARTED THE VEHICLE TO DRIVE 30 MILES FOR AN APPOINTMENT. WHILE DRIVING, ALL OF THE INTRUMENT CLUSTER LIGHTS ILLUMINATED. THE EYE SIGHT TURNED OFF, CRUISE CONTROL NO LONGER WORKED, PARKING BRAKE LIGHT WAS ILLUMINATED, ABS LIGHT WAS ILLUMINATED. TPMS LIGHT WAS ILLUMINATED. THIS HAS OCCURED 2 TIMES BEFORE. THE FIX FOR THE PREVIOUS ISSUES WAS TO CLEAN THE BATTERY TERMINALS.

NHTSA ID

11636557

Incident

Jan 16, 2025

We have had to replace battery twice and had to have auto club give us a jump start multiple times. We drive this vehicle once or twice a month, but something is causing battery to run down way to fast. Manufacturer claims we need to drive more often. I have always had one car, that burned to much fuel, and was used as an occasional vehicle, but never had this type of problem. Something needs to be provided so that battery does not leak power when it is a low use car. I don’t want the internal lights to turn on when I walk by, or for it to access the internet. I believe that this leaves us vulnerable to non-availability at a critical time. We are planning a multi-week trip and have no idea if car will start when we return. Nor is their a way to disconnect unneeded activity that is draining battery.

NHTSA ID

11630014

Incident

Nov 27, 2024

Over the course of 5 years, a lot has been mechanically wrong with our vehicle. Each service appointment yielded a 'cannot duplicate' response. Recently, my car has been in the service department a few times. My car had recall work performed on a ground bolt, and my husband advised them that the car had a 'rich fuel' smell when starting with the hood open. I've complained since 2021 of a smell when pulling up the mountain. The smell is what I described as a perm solution smell. Each time, the response was 'cannot duplicate.' In February, I took the car in to have the exhaust inspected because it was getting louder each passing day. I was advised that the entire exhaust needed to be replaced, and I would be responsible for costs. I brought my car home, unrepaired, and called Subaru of America to file a claim through them. I had repeatedly expressed concerns, and nothing was done, yet I'm expected to foot the bill now. Since February 12th, I have been back and forth with Subaru and just made the appointment to get the exhaust work completed, with a small contribution from Subaru. However, this past Saturday, [XXX] my vehicle caught on fire while driving. I am fine, but my vehicle has now been deemed a total loss. As I was descending the mountain, I smelled the same 'perm solution' smell, and shortly after, there was smoke coming from under the hood. The smoke entered the cabin as I pulled off the road. Upon exiting the vehicle, flames and smoke were visible from the hood. I grabbed my purse and ran, called 911, and watched my vehicle engulfed in flames. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11583533

Incident

Apr 17, 2024

Car battery died in store parking lot. Low mileage (24,000). I do lots of short trips and this is a reported problem for 2019 Subaru Ascents. I had to wait 2 hours for someone to bring a charger to drive to auto parts store fire replacement battery.

NHTSA ID

11561880

Incident

Dec 26, 2023

Battery keeps dying.

NHTSA ID

11560454

Incident

Dec 16, 2023

Rear lift gate drains battery to the point where the vehicle won't start. The tailgate will beep three times, but will not open. Within 24 hours, the battery is insufficient to start it. You have to do a manual override to open the lift gate. The battery, starter and alternator were all tested and had no issues. I have to keep a jump pack in the car as the issue has become more frequent. The local Subaru dealership in Mequon, WI said they would replace the battery, but won't replace the module identified in a technical service bulletin for no charge: https://static.nhtsa.gov/odi/tsbs/2019/MC-10163522-0001.pdf This seems to be a very common problem with the MY19 Ascents.

NHTSA ID

11537790

Incident

Apr 10, 2023

The radio started turning on and off repeatedly and does not work. The back door will not open using any of the buttons.

NHTSA ID

11536691

Incident

Aug 3, 2023

Arrived at my car after traveling for the weekend, and arrived to my car to find out the battery was dead. Nothing on, lights were in Auto like normal. The last thing I did after getting out of my SUV was grabbed my suitcase from the trunk. I think it must not of latched correctly and it drained the battery. There is supposed to be a light delay to preserve the battery but it did not work in this case. I still can't open the trunk. This happened once before while camping with our dogs we left the tailgate up to unpack and pack the SUV. We loaded the dogs up to leave the campsite. When we went to start the SUV the battery was dead. Seems leaving the tailgate open drains the battery. The problem is even after we got our car jumped and the car was operating okay, we could not open the tailgate. It just makes a beeping sound like it wants to release but will not open. The manual handle should allow anyone to open the gate even if there is a electrical disturbance. This is a safety issue related to not being able to get our dogs out of the cargo compartment. Our dogs are over 100 lbs and their travel crates are large and need to be opened from the rear of the vehicle.

NHTSA ID

11535153

Incident

Jul 24, 2023

Car has been not able to roll up driver side window for a year randomly. Suddenly 3 years old and battery is draining and RAB and Eyesight and engine light on. Took in and saying can’t replicate window after they DID replicate it 3 months ago and did not solve issue. Did battery parasitic draw and numerous parts of car are draining battery. Cannot find source.

NHTSA ID

11522750

Incident

May 12, 2023

Car system drains battery for no reason. Opening a trunk or door for a 5-10min to load or unload vehicle is enough to drain a new full battery. This can leave people stranded in parks and remote areas. We have had the battery checked and verified it is good. This problem has happened multiple times on our Ascent.

NHTSA ID

11516271

Incident

Apr 10, 2023

Battery drains and goes dead at least once a month. Battery was replaced by dealer and still having battery drain issues.

NHTSA ID

11515347

Incident

Apr 6, 2022

I parked my Ascent rear facing inside of my garage to unload my groceries. When i opened my hatch at the front button, the hatch only opened halfway. The hatch would not close with the push of the button and had to be closed manually. Once I returned to my Ascent to go somewhere, the hatch sensor beeped repeatedly, while driving, until coming to a complete stop. Once driving continued, the sensor continued beeping. This occurred with two straight vehicle drives. The entire course of the drive. I parked the Ascent in my garage and returned to the car the next morning and the Ascent would not start. AAA came to do a jumpstart with no remedy. We replaced the battery with a new, borrowed battery and the car started immediately with no beeping. We charged the old battery and replaced the new battery and the Ascent had no other issues, including easy startup and no beeping. There were no warning lights for any of the issues including the hatch or the battery.

NHTSA ID

11511697

Incident

Mar 9, 2023

Battery went dead after leaving tailgate open for 1hr

NHTSA ID

11509798

Incident

Mar 1, 2023

My vehicle won’t stay charged. We replaced the battery and still every single time I go out to start it it’s completely dead and I have to get it jumped.

NHTSA ID

11501854

Incident

Jan 15, 2023

The contact owns a 2019 Subaru Ascent. The contact stated that she became aware that the VIN was included in a recall. The VIN tool confirmed that the VIN was included in NHTSA Campaign Number: 22V907000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The local dealer was not notified of the issue. The manufacturer was notified of the issue and the contact was informed that she would be notified within 24 hours. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID

11497247

Incident

Dec 9, 2022

The contact owns a 2019 Subaru Ascent. The contact received notification of NHTSA Campaign Number: 22V907000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID

11497218

Incident

Dec 9, 2022

Battery dead, once 6 months ago when rear gate opened and closed several times before staying open for a few hours before neighbor asked if I knew it was open. Battery dead after driving to 2 stops on 10/24/22 then dead again in airport parking on 10/28/22 when returning from trip. Took into dealership 10/29/22 and problem confirmed although not sure if it is the battery or charging the battery. No warning lamps. Have to wait by myself until I can get a jump start. Don’t know when or where it might not start, puts my safety at risk by not knowing where or at what time of day or night I might be stranded.

NHTSA ID

11491443

Incident

Oct 28, 2022

Battery drains fully from unknown reason. This has happened at least 3 times since purchasing the vehicle, brand new, in 2019. I have had to call roadside assistance within the first year and have purchased a 2 other new batteries. There were no light or other electrical items on which would have drained the battery. It’s starts slow where I need to jump start the vehicle about 5 times before the battery is completely dead. It puts me and my family at risk of being in an isolated or unsafe place when the battery dies and need to wait for roadside service. To my recollection there were no safety checks completed for this issue. I do have a scheduled appointment at a Subaru dealer on 10/27/22 where I will ask them to look at this. There were no warning signs or indications prior to the battery draining.

NHTSA ID

11488735

Incident

Apr 15, 2020

Vehicle has experienced total loss of power while driving under normal circumstances. This has occurred in a drive-thru, at 45 and 50mph, and also twice during 70mph highway driving. The entire vehicle shuts down and multiple dash board lights illuminate at the time of power loss. I first documented this on 4/7/22 and it randomly occurs every month, once it even happened twice in the same day. I had called the dealership (where I purchased the vehicle and have it serviced) multiple times throughout the spring and summer awaiting parts for the TCM recall with the assumption that this could be the issue. However , my vehicle passed the recall and even after the new TCM was placed on 8/19, I again had the same event on 10/1. Vehicle was taken in on 10/6 for diagnostics on this issue again and nothing found. I do not feel like the dealership has been accurately documenting my issues so I will need to be more persistent in getting someone to address the problem as this could be a serious safety issue.

NHTSA ID

11488247

Incident

Oct 1, 2022

2019 Subaru Ascent experience battery drain. Was able to start after jump and had 13 volts when returned home. Next morning it did start, barely, but was down to just above 12 volts. Appears to be the electrical system drain.

NHTSA ID

11487821

Incident

Oct 3, 2022

Subaru ascent issues with electrical system and battery. Engine cranks longer than it should before starting- anywhere from 5 to 25 seconds. Battery dead multiple times. Have taken to Subaru multiple times, they replaced the batter once but have ignored repeated requests to fix the issue of parasitic battery drain from faulty electrical system.

NHTSA ID

11486279

Incident

Sep 21, 2022