10.0

really awful
Crashes / Fires:
3 / 2
Injuries / Deaths:
2 / 0
Average Mileage:
4,156 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2021 Subaru Forester engine problems

engine problem

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2021 Subaru Forester Owner Comments

problem #16

Dec 142024

Forester

  • miles

A D V E R T I S E M E N T S

12/14/24-I was stopped at a red light at a VERY busy intersection. The engine was in stop mode by the start/stop feature. When the light turned green, the car failed to start. The entire car shut down, with alarms sounding and dash lights flashing. The entire system had to reboot before I could restart the car. It was a freighting experience. Fortunately, I wasn't killed by traffic zooming by or by some person with road rage. 12/16/24-Issue evaluated by local Subaru dealer. Their evaluation was that when the auto start feature was activated, my car battery was too low to work. There was zero warning about a low battery before this failure in traffic. I had to buy a new battery. The auto start/stop feature is not an enhancement, but a safety hazard. Owners should be able to permanently disable this unnecessary drain on batteries and starters. I did a search, and there are plenty of others that experienced similar issues with their Subarus.

- Tulsa, OK, USA

problem #15

Dec 222024

Forester

  • miles
At 40936 the valve body needed to be replaced. With such low milage vehicle is having problems.

- Bronx, NY, USA

problem #14

Jun 072024

Forester

  • miles
Thermo control valve defective. Not informed one week ago when I purchased car at end of lease. Problem known to Subaru since 2019 or sooner. Would not have purchased if I had been notified about this major problem

- Jamaica Plain, MA, USA

problem #13

Nov 062023

Forester

  • miles

A D V E R T I S E M E N T S

Vehicle was parked and idling unoccupied for under 5 minutes when an extremely noxious, hot blast of fumes came from underneath the back. Black smoke immediately entered the passenger cabin through the vents and flames were visible in the engine compartment and running onto the ground. Entire vehicle was burned beyond recognition in a matter of minutes. Ten days earlier the TCV, a known problem, had been replaced at a dealership per TSB 09-80-21. The vehicle had been driven under 300 miles since the replacement. Afterwards, a manufacturer rep inspected the vehicle, indicated the fire started in right rear of the engine compartment, could have possibly been a fuel leak, but damage was too extensive to determine the exact cause. The referenced TSB explicitly requires a new fuel line for every TCV replacement.

- Hearne , TX, USA

problem #12

Feb 122024

Forester

  • miles
The 2021 Subaru Forester had been functioning normally with no warning lights. About 25 minutes into the drive I had come to a stop light on an upward incline. When the light turned green I moved from the brake to the gas as usual. However the auto-start function on the car failed, causing the engine to stall. A loud clunking sound was heard and the dashboard lit up with multiple lights, although I do no recall which ones were illumined. I attempted to press the gas again and the car did not respond. During this short time my foot was pressing on the gas the car rolled backwards and collided with the vehicle behind me. I continued attempting to press the gas pedal and still no acceleration was made. After parking and restarting the car it has resumed normal function. I have not yet visited the dealership so this issue has not yet been reproduced, nor has the offending system been inspected. I'm summary, the automatic engine start failed at a critical location, putting myself and others in serious danger and ultimately caused a crash.

- Beverly, MA, USA

problem #11

Dec 222023

Forester

  • miles
Once or twice a day my vehicle hesitates from a light and I have to almost floor it to get it going again.I have brought it to 2 different Subaru dealers 3 times and they say they can't fix the problem.

- Gambrills, MD, USA

problem #10

Sep 122023

Forester

  • 34,000 miles

A D V E R T I S E M E N T S

The contact owns a 2021 Subaru Forester. The contact stated while driving 10 MPH, the vehicle became inoperable. The vehicle stopped independently and failed to respond to the brake or accelerator pedal being depressed. The vehicle was turned off and restarted and returned to normal functionality. The contact stated that the Eyesight detection warning light was illuminated. The vehicle was diagnosed but the cause of the failure was not determined. The vehicle had not been repaired. The manufacturer was made aware of the failure and advised the contact to bring the vehicle in for an extended time. The failure mileage was approximately 34,000.

- Stockton, CA, USA

problem #9

Dec 202022

Forester

  • miles
Vehicle auto start stop feature sporadically fails to start vehicle after stop feature stringers. Happened on multiple occasions, at red light, at stop sign, on freeway during traffic jams.

- San Francisco, CA, USA

problem #8

Jan 282023

Forester

  • miles
My vehicle stalls at stop signs and red lights at Least once or twice a day regularly I-??ve taken to the dealer and they said I was the reason it does that but the car is barely 2 years old bought new it has been doing that since last year it needs to be fixed

- Brooklyn , NY, USA

problem #7

Nov 082022

Forester

  • miles
Engine stalled 2x within 8 days at major intersections (both times), therefore blocking a lane in the intersections. Was told 1st time it was a gliche by dealership. Upon researching prior recalls for this make and model, engine stalls have been an issue. Dealership still can-??t figure out issue.

- Delray Beach, FL, USA

problem #6

Aug 232022

Forester

  • miles

A D V E R T I S E M E N T S

On 08/23/2022 while driving on a four lane city street, light rain, moderate traffic, at about 35 mph, the car suddenly lost forward speed, depresssing the accelerator move rpm to over 3000, with continued loss of forward speed, until suddenly the drive train engaged and forward speed resumed. This is the fourth time this type of event has occured. A check at a Subaru dealer the next day revealed no codes in memory. Fortunately there was no heavy traffic on this road at the time because in another half hour there would have been very heavy traffic. This is very disconcerting and potentially dangerous to vehicles directly behind. Is there a problem with the Eye Sight system that triggers a sudden loss of speed when there is no vehicle close ahead?

- Isle La Motte, VT, USA

problem #5

Jul 092022

Forester

  • miles
on 7/9/22 @ 6:00p I was with my wife & 2 grandsons going into a diner parking lot. as I was slowly going into a spot the car suddenly and without warning accelerated causing the car to drive over a cement parking stop, over a 1foot high cement wall, through a chain linked fence which had privacy covering, down into a 12 deep ravine. after shutting off the car my grandsons, wife & myself had to crawl out through the rear hatch. when things quieted down we realized that none of the safety features were activated (anti-collision warning, anti-collision braking) I thank God no one was hurt. Subaru needs to look into this so in the future no one ever experiences this.

- Massapequa Park, NY, USA

problem #4

Jun 122022

Forester

  • 20,000 miles
The contact owned a 2021 Subaru Forester Sport. The contact stated while driving at 75 MPH, the front end of the vehicle crashed into a small deer. The air bags did not deploy. The contact veered to the side of the road. The contact's friend who was occupying the front passenger seat exited the vehicle and inspected the front end of the vehicle. The contact's friend then advised her to immediately exit the vehicle as there were flames underneath the hood of the vehicle. The contact stated while she was exiting the vehicle and letting her three dogs who were occupying the rear seats out of the vehicle, the fire expanded to the entire front end of the vehicle. The contact stated that the vehicle burned significantly. The contact was able to extinguish the fire with the assistance of the fire department. A fire department report was filed. A police report was filed. The vehicle was towed to an independent mechanic, where it was totaled. The contact sustained a soreness on the right knee but did not seek medical assistance. The dealer was notified of the failure but did not provide any assistance. The manufacturer was not notified of the failure. The failure mileage was approximately 20,000. The VIN was unavailable.

- Cheboygan, MI, USA

problem #3

Apr 272022

Forester

  • miles
This is in reference to tracking # 11462054, a third incident of sudden engine power loss/deceleration. On 04/27/2022 the 2021 Subaru Premium was returned to the selling Subaru dealer to try and fix the two previously reported problems. They found no codes in memory and no problems when road tested. I left the dealer to return home, and about 10 min. after, on a two lane city street, the engine suddenly lost power while I was going about 25mph, and decelerated to about 10mph before regaining power. I drove back to the dealer and a service rep came with me for a road test of several miles, where the car operated normally. At the dealer, there was no code in memory. The mileage was about 13,135. No paperwork was provided by the dealer. How to resolve this problem"?"

- Isle La Motte, VT, USA

problem #2

Apr 022022

Forester

  • 12,500 miles
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.

- Isle La Motte, VT, USA

problem #1

May 222021

Forester

  • miles
The vehicle gets a shudder at different speeds and it feels like it's either the transmission is slipping or its coming from the motor but it NEVER THROWS a Trouble Code so as the dealership says if its not throwing a trouble code they can't diagnose it until it does. So that's why I don't like these vehicles because no one know how to fix it old school by being a real mechanic and going old school to find the issue.

- Naugatuck, CT, USA

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