2021 Subaru Forester Problems

Windshield cracks with the slightest rock hit making the windshield unsafe to continue use. Had two replacements in first six months

Having repeat issues with the windshield cracking. My vehicle has around 32k miles, and I'm already on my 3rd windshield. I've never had this issue with any other vehicle. It's been extremely costly. Also the transmission failed and had to be replaced at 26,000 miles.

When coming to a stop, the auto start/stop system shuts the engine off and it fails to restart. All dashboard warning lights illuminate. The vehicle must be shifted to Park and restarted manually with the start button. The component that failed is the auto start/stop system; the exact cause is UNKNOWN. The vehicle is available for inspection upon request. This put safety at risk because the vehicle was left immobile in live traffic at stops until it could be restarted. There were no warning lamps or symptoms before the failure; the warning lights come on when the failure occurs. The vehicle was inspected by Gillman Subaru Southwest on October 229, 2026, and the dealer stated the battery performance was bad and in critical condition.

Component Failed & Inspection Availability: The vehicle suffered a sudden, catastrophic mechanical engine block failure at 74,000 miles. The dealership teardown confirmed a failed/spun lifter bearing and a fractured connecting rod cap, requiring a complete engine replacement. This sudden oil pressure failure/blockage occurred while the engine oil pan was verified completely full. This sudden mechanical failure is directly consistent with severe localized thermal breakdown from a failing Thermo Control Valve (TCV)—a component subject to Subaru Warranty Extension WMM23—or loose factory RTV silicone debris clogging the oil galleries. The failed components, including the engine block, rod cap, and TCV, have been retained by the owner and are fully available for inspection upon request. Safety Risk: The engine failed catastrophically and seized instantaneously while driving at highway speeds, causing a sudden and total loss of motive power. This created an immediate hazard as the vehicle rapidly decelerated in active traffic without warning, blinding drivers behind me and stripping the vehicle of power steering assist. This forced a dangerous maneuver to navigate the disabled vehicle through highway traffic to the shoulder, significantly risking a severe rear-end collision. Dealer Confirmation & Inspection Status: The problem and point of failure were officially confirmed and documented via a physical engine teardown conducted by a certified Subaru dealership service center. Subaru of America Corporate Advocacy was notified under Case Number 260818-1500487 but denied coverage. The components have not been inspected by the police or insurance representatives, but they remain preserved as physical evidence. Warning Lamps & Symptoms: There were no warning lamps, check engine lights, low-oil indicators, or abnormal electronic codes prior to the instantaneous mechanical failure. The vehicle had been professionally serviced and oil-changed just 3,800 miles prior to the breakdo

When coming to a stop, the auto start/stop system shuts the engine off and it fails to restart. All dashboard warning lights illuminate. The vehicle must be shifted to Park and restarted manually with the start button. The component that failed is the auto start/stop system; the exact cause is UNKNOWN. The vehicle is available for inspection upon request. This put safety at risk because the vehicle was left immobile in live traffic at stops until it could be restarted. There were no warning lamps or symptoms before the failure; the warning lights come on when the failure occurs. The vehicle was inspected by Gillman Subaru Southwest on October 229, 2026, and the dealer stated the battery performance was bad and in critical condition.

I was stopped at a red light. When the light changed to green I put my foot on the gas and the car totally stalled out. There were no lights, fans or radio on just total silence. I tried to restart the car putting it is park and depressing the brake while pushing the start button and nothing. It didn't even try to turn over. silent, dead. I tried several times with no luck. I got out of the car to signal to the bus and row of cars behind me to pass me. I got back into the car and tried to start it again and this time it started. I drove immediately to the mechanic near my house. They couldn't see what was going on without me leaving the car next week. The battery had been replaced 6 months ago. This was a busy intersection and I was worried about getting out of the car but I had no choice.

My Subaru Forester has a significant safety defect. If my web searches are representative this software problem affects multiple models and years of Subaru. I have addressed this problem with the local dealer, Subaru America, and Subaru Japan and have been told "that is the way it was designed and it is supposed to do that." As you may imagine that is not a satisfactory answer to a significant safety issue; I can only imagine Ford saying the Pinto was designed with a gas tank that explodes in a collision or a more recent Takata claiming that their seatbelts were designed that way. So here is the problem in a nutshell (and I have a host of Emails from various levels of Subaru if you want the details of how I have attempted to get them to address the issue.) There is a sensor on the gas cap that detects if it is not fully closed since that is a pollution control issue. (More on that later) When that sensor is activated, it disables the Subaru Eyesight system and when the Eyesight system is disabled it disables every safety feature except the seatbelt and it lights up the dash with a dozen alarms none of which have anything to do with the gas cap. That takes down collision avoidance, lane changing, and autodim headlights among others. It also wants you to check the engine and consult the users manual. None of that has anything to do with the actual situation. Now I have taken the car to the dealer who assures me it is operating as designed and there is no fault in the sensor. When you close the gas cap there are audible clicks and as a 190 pound man I can assure you that the cap is fully closed when I close it. But on a random basis the dashboard lights up despite the fact that the gas cap is fully engaged and the safety systems become disabled. Usually it stays lit up until I refill the tank, but its behavior is not predictable - occasionally it just resets as I drive. Besides the obvious hazard of having safety systems which do not work, havi

I am writing to file a formal complaint regarding repeated, severe, and dangerous malfunctions of the vehicle's engine Start/Stop (Idle Stop) feature. The system is failing to operate as intended, resulting in the engine stalling while the vehicle is in motion or under crucial driving circumstances, creating significant safety hazards. History of Incidents I have experienced four separate incidents where the engine unexpectedly stalled or shut down, creating extreme risk: Incident 1 (Railroad Tracks): The engine stopped while I was actively driving over railroad tracks. The car stalled on the tracks, and within seconds of the engine restarting, the crossing gates came down and a train passed. I narrowly avoided being hit by the train, missing the impact by approximately ten seconds. Incident 2 (Heavy Traffic/Bridge): During heavy, back-to-back traffic as a bridge (PGA bridge) was opening, the car momentarily stopped and then resumed movement. The unpredictable stopping motion created a severe risk of being rear-ended, as the following vehicle would have had difficulty anticipating the sudden, unintended stop. Incident 3 (December 2025): While taking a right turn, the engine stopped suddenly, with dash lights blinking, during only a slight pause in vehicle movement. This occurred while the vehicle was still maneuvering. Incident 4 (The following day): The engine stopping malfunction described in Incident 3 occurred again the next day. Attempted Repair and Ongoing Concern Two years ago, the dealership installed a new battery following the first two incidents. However, the problem has now recurred this week (December 2025). The dealership has informed me that using a third-party device to permanently disable the Start/Stop function would void the powertrain warranty. Causing Mechanical Stress: I believe the continuous, potentially faulty activation is putting unnecessary stress on the battery, electrical system, and engine components, which may ultimately shor

When coming to a stop, the auto start/stop system shuts the engine off and it fails to restart. All dashboard warning lights illuminate. The vehicle must be shifted to Park and restarted manually with the start button. The component that failed is the auto start/stop system; the exact cause is UNKNOWN. The vehicle is available for inspection upon request. This put safety at risk because the vehicle was left immobile in live traffic at stops until it could be restarted. There were no warning lamps or symptoms before the failure; the warning lights come on when the failure occurs. The vehicle was inspected by Gillman Subaru Southwest on October 229, 2026, and the dealer stated the battery performance was bad and in critical condition.

The contact owns a 2021 Subaru Forester. The contact stated that while driving and accelerating from a stop, the vehicle started bucking and hesitating. The vehicle was taken to the local dealer to be diagnosed, and it was determined that the transmission control valve body was inoperable and needed to be replaced. The transmission control valve body was replaced and the vehicle was repaired. The manufacturer was notified of the failure and informed the contact that the repair was not covered under an extended warranty associated with the failure. The failure mileage was 66,902.

On August 12, 2025, at approximately 10:16 AM, while driving at normal speed on CR-43 NW southbound just past Minnesota Ave in Big Lake, MN, my Subaru’s EyeSight Driver Assist System, specifically the Automatic Emergency Braking (AEB) / Pre-Collision Braking System, suddenly activated without warning and with no obstacle present. The braking was abrupt and unnecessary, causing the vehicle behind me to nearly rear-end mine. Road conditions were clear, dry, and unobstructed, with no pedestrians, vehicles, or hazards in my lane. This appears to have been a “false positive” from the AEB system. This sudden stop placed both my safety and the safety of other drivers at serious risk, and in different circumstances could have caused a collision resulting in injury or death. The vehicle is available for inspection upon request. The problem has not been reproduced or confirmed by a dealer or service center because Subaru requires a $200 diagnostic fee, which I have not paid. The vehicle has not been inspected by Subaru, police, insurance, or any other parties for the same reason. No warning lamps, error messages, or other indicators appeared prior to the incident. All systems appeared to be functioning normally before the unexpected braking occurred. I am concerned this defect persists beyond 48,000 miles, outside the limits of prior settlements, and believe Subaru should issue a recall covering all affected vehicles, regardless of mileage, to prevent potential crashes.

Brake Rotor and Pad issues at 20K, 30k, 40k, and 66k- eventually replace OEM parts with aftermarket Duragold parts. Rotors had severe damage at every 10k interval with gauged Metal on rotor

On two separate occasions, less than one year apart after Subaru Service replaced my battery with a “larger” battery without my knowledge my vehicle suffered sudden, catastrophic electrical failure while moving in active highway traffic, causing an immediate loss of propulsion and creating a life-threatening safety hazard. This has happened two times the second time less than a year after the “larger” battery replacement. This car has less than 50,000 miles on it and has a perfect service record all done at AutoNation Subaru Carlsbad. We refuse to drive this car, even though it has been serviced and a new battery has, yet again, been installed. We have no faith in this car and are not willing to put ourselves in a life-threatening situation again. We also do not feel comfortable selling this car, even though we have received many above market offers. We do not feel that we can sell this car in good conscience to an unknowing next victim. It is unsafe to drive and can lose power at any moment while driving without any explanation given from Subaru. The first battery failure occurred prematurely in August 2025. Asked repeatedly why a car battery would fail while driving? Could not get a straight answer except that someone finally said it could possibly be from the auto stop start system The new larger battery failed less than one year later in August 2026, so it didn’t even last a year and it was larger. The service department at AutoNation Carlsbad told me my car passed all the test and I have nothing to worry about. This goes against any common sense. How could this happen 2 times where no issue has been disclosed. Both situations were extremely traumatic and dangerous and I feel lucky that I was able to come out of it. I’m not sure the next time would be the same. We are not able to drive this car because common sense tells us there is a bigger issue going on. So far we’ve communicated with Subaru of America and were denied California Lemon law without reason.

While driving this car on April 4, 2026 at around 6PM, I experienced the distinct smell of gasoline. I had driven for about 5 minutes on our way to a local restaurant that is approximately an 8 minute drive from our residence. My wife said that she had just filled the gas tank that afternoon. After arriving at the restaurant, I checked the gas cap to ensure it was tightly sealed. I also checked to ensure no fuel was leaking from the car. After finishing dinner, we I drove the car back to my residence and once again, 5 minutes into the drive, I smelled gasoline. After we arrived home, I check the vehicle exterior for leaks and found no liquids under the car. The following day, April 5, 2026 at approximately 1115 AM, having once again found no liquids or gasoline under my car, I drove the car to my local repair shop; an 8 minute drive. About 5 minutes into the drive, I smelled gasoline again. I parked the car at the repair shop, but while adjusting the parking to fit better between the painted lines, I saw and heard a large puff of smoke from the hood area. I immediately put the car into Park, shut off the engine and ran from the car. After exiting, I saw that the car ignited with visible fire under the engine compartment. I called 911 to request fire department help. No damage to any structures or other cars occurred. Q1 Above: No the car is totaled and unavailable for inspection as far as I know. Q2 Above: I had to run from a burning car. Q3 Above: No. Q4 Above: Yes, the car was inspected by my insurance company, USAA. Q5 Above: No, there were no warning lights or any indictor that there was trouble. I would like to note that the car was brought in to my Subaru dealership service station (Hyman Brothers in Midlothian, VA) for a heater element safety recall several months ago.

Issue started with hearing a clunking noise from the front of the car, had the dealer inspect at 37,000 miles. They said they the clunking was caused by ECU issue and reprogrammed the ECU to correct it. Obviously, a software update did not correct the noise. Had an independent repair shop inspect the vehicle and found both front control arm bushings were cracked and torn allowing the control arm to move around causing the noise. Since the control arms are an integral component of steering the failure of these bushings could've caused loss of control, or an accident. They were replaced by the independent shop and now the noise is gone.

Front suspension lower control arm Bushings left and right side failed

There’s two brackets that are at the top of the tailgate, and also at the top of the body where they meet to match up, The bracket on the right sits flush, the bracket on the left since indented about a 1/4” give or take. Because it’s painted by the factory, there’s no cracks around the bracket and the paint, meaning it happened at the factory. I’ve looked at other cars that are in that same model year bracket between 2018 and 2025, and they’re all variations of the Subaru Forrester. Didn’t matter if a sport or limited any of that. They all have the same indented left hand bracket that is causing mold on the interior of the car, some worse than others, and I spoke to the people that own the cars, the ones that are parked in a garage or car covered, they have less mold, the people that parked their cars outside have more mold. But they all have the same bracket on the left-hand side that is screwed up. I’m attaching photos to show the amount of mold damage we have taken, and so much more.

While driving on the highway on 8/15/24, the rear driver's side door randomly opened. The warning/indicator light came on, as well as the overhead lights. I also immediately was able to hear extra road noise coming from that side and could clearly see through my side view mirror that the door was ajar (it was not wide open). I have not had the car inspected by anyone.

driving on [XXX] in NJ on [XXX] at approximately [XXX] my car just stopped in traffic and steering locked up and all lights came on dashboard along with a constant beeping sound-I was in the middle of a four lane highway traveling south-I could not get out of my car and feared someone would hit me as I was a "sitting duck" while cars were swerving around me-my only saving grace was that my flashers worked after I turned them on-I called roadside assistance as I was starting to panic and was told they could not help me as I was on a private road-I saw a helicopter overhead and at the same time a police office weaving in and out of traffic behind me to slow and stop the traffic-he then proceeded to push my car off the road with his car to the shoulder and called a tow truck-car was towed to nearest Subaru dealer where they performed a diagnostic test and found NOTHING WRONG WITH MY CAR!! How could that BE?? I was then charged for the test and the tow-have called Subaru customer care several times but they say they cannot help me because the test result showed nothing-Please help me as I no longer have peace of mind driving this vehicle and I am [XXX] who needs to drive long distances several times a month- there were no previous warnings in my car it just stopped INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving on I-17 Southbound near mile marker 311 at approximately 75 mph, I experienced a sudden and dangerous malfunction of the Lane Keep Assist (Auto-Steer) system in a 2021 Subaru Forester. The feature was active at the time and unexpectedly veered the vehicle sharply toward the concrete wall on the left shoulder of the highway. I attempted to regain control, but due to the abrupt nature of the malfunction, I overcorrected and collided with the wall on the rear driver side. There were no vehicles in the immediate vicinity, or this could have resulted in a multi-vehicle collision at high speed. I hit my head during the impact but did not require emergency medical services at the scene. Road conditions were dry and clear, with no visible debris or extreme weather factors. There were no warning lights or error messages from the vehicle prior to or during the incident. The Auto-Steer system did not disengage on its own before veering off course. This was the first time driving this particular vehicle, which was a company car, and I immediately reported the incident to my employer. The damage was reported and the vehicle is seemingly available for inspection. At the time of this report, the issue has not yet been formally diagnosed by a dealer or service technician. The failure of this driver-assist feature significantly endangered my safety and potentially the safety of others had there been nearby traffic. I am filing this report so the issue can be investigated, and similar malfunctions prevented in the future.

See attached document for complaint.

I was coming out of my garaged ( car was facing forward) . The car seemed to hesitate as I tapped the gas pedal. I thought maybe this was because the car sensed the sides of the garage via the rear view mirror sensors. I am always careful when exiting my garage so as not to ding the rearview mirrors. I repeatedly tapped the gas lightly about three times but the car hesitated each time and did not want to seem to move forward. One last time I tapped the gas and the car bolted out of the garage jumped the curb across the street at an unexpected rapid speed. I did not have my foot on the gas pedal. The car lunged forward , crossed the street and hit the garage door and frame of the house across the street for me doing structural damage. I believe this to be unintended acceleration for which other Subaru models have experienced problems. The air bags did not deploy. Please see similar accident for another example of this same scenario with the same make model and year as my vehicle: https: //www.google.com/amp/s/www.torque net.com/1084/subar-acceleration-lawsuit-update-forester-slams-garage/amp

We’ve been using our Gold Revolve 360 car seat in rear facing for 14 months with our daughter who just turned two on August 19th. After normal wear, no car accidents and removing the carseat from the vehicle only a handful of times for sleepovers at grandparents and I’ve noticed a tear in the right strap, so bad that is nearly cut all the way through. This is toward the bottom where the strap meets the seat. From what I can see, there is nothing for it to rub up on to cause this, and my daughter is not allowed toys while in her car seat that could potentially do this. This is our only carseat at this time and it is extremely concerning every time she rides in it. We spent far too much money for this to happen, especially just over a year of use. I’ve tried reaching out to Evenflo via phone, website contact support and have emailed 8 times. Their chat services on the website are never available, even during hours of operation. I’ve called the number provided to me when I got the automatic response to the form I filled out on the contact tab,1 (800) 233-5921, and was told to email only by a automated message. Then there was a different number listed on the website that was a fraud number, 1 (800) 223-5921. And have yet to receive an email back after being asked to send a list of specific photos for their engineer team over a month ago. At this point I don’t feel safe putting my daughter in the car seat anymore. This should’ve been the last car seat I had to buy for her until a booster seat. And it barely made it a year and cost me $400+. I’m beyond frustrated by the lack of support I’ve received from Evenflo and the trust I had in this product.

This is our 3rd Subaru Forester from Corpus Christi Tx dealer HICKs. During the past six months we have had the stem valves in the tires replaced 4 times.I said to the Manager that there appears to be a systemic issue , the run may be defective and requested that these tires be replaced Total mileage 6700 Dealer had three shots at fixing the problem plus the 4th shot today as the pressure signal was on. The request was denied Please investigate and help

The contact owns a 2021 Subaru Forester. The contact stated while shifting the vehicle into the drive gear, the vehicle accelerated at high speed without any warning and drove into the wall of her garage causing front damage to the vehicle. The contact stated that the vehicle hesitated to turn off. No one was injured. The vehicle was not diagnosed. The dealer was not contacted. The manufacturer was not notified of the failure. The failure mileage was 8,000.

On 04/02/2022, several minutes after having filled the gas tank, I was driving at about 35 mph on a two lane road at constant throttle, when the engine suddenly lost power for several seconds before it regained acceleration. There was a pickup truck following me very closely and it swerved around me to avoid hitting me. On 04/13/2022 , several minutes after leaving my driveway, at about 27 mph on a two lane road, the engine again lost power for several seconds before resuming power. In the first case the engine was at operating temp., in the second case it was cold. I will take the vehicle to the Subaru dealer from whom I purchased it in a couple of days to evaluate the problem, which I consider to be serious. In both cases I was so surprised that I didn't look at the tach etc. 12,500 miles.

Tire size: P225/60R/17 98T Was driving around a roundabout @ about 25mph. There was a "Bang" and the right front tire went instantly flat. At no time did the vehicle either hit an object on the road or a curb. Vehicle was pulled over immediately. There is no rim damage that might indicate a curb strike. Upon examination of the tire there is a 2 inch rip in the sidewall of the tire. The tires (4) had been installed on the car @ 20,988 miles. They had been rotated at 27,427 miles. The blowout occurred @ 33,721 miles (12,733 miles from installation. I was told that there is no warranty on the tire(s) since we were not the original owner of the car when they were installed.

Car drains battery. 45,000 miles and has had 3 batteries and have been told it needs another. Dealer says start stop switch, requires a battery of 750 CCA and not the Subaru recommend battery. Car will die in traffic and driver seat adjusts to different positions by itself. Told that these problems will never stop unless I get a higher rated battery than required.

I believe Low Beam Head lights must be carefully inspected in low light environments, when driving at around 60mph at 2 lanes highway where you cannot use high beam lights, the sight is clear at the sides of the road but its to low down at at the speed driven if something shows up at the road it would be impossible to see and to stop at a safe distance. I believe the lights from your car ahead are too low to the ground and the visibility is dangerously short, I think that problem should be revised carefully. When driving on a highway alone at night that concern can be seen and maybe understand what I want to say and why that can cause an accident.