2020 Subaru Forester engine problems

Filed Oct 26, 2026 · Driver assistance, Engine · FL

On XXX, while driving my 2020 Subaru Forester Sport (VIN [XXX]) at approximately 35 mph on [XXX], the check engine light came on and EyeSight, adaptive cruise control, and pre-collision braking were disabled / other warning lights appeared / engine temperature issues. A diagnostic scan showed code [P2682 / P26A3 / P26A5], and the Thermo Control Valve (TCV) was found to be defective. Mileage at failure: 33,297. Subaru has acknowledged this defect in Technical Service Bulletin 09-119-24, which extends warranty coverage for the TCV on 2019–2021 Foresters to 15 years/150,000 miles. However, Subaru of America denied coverage and goodwill (case XXX) because the vehicle was originally sold in [XXX] through Subaru’s independent distributor, Trebol Motors, before I moved to [XXX] in XXX. This failure disables key safety systems without warning and should be addressed through a safety recall that covers all affected vehicles, including those sold in U.S. territories. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 14, 2026 · Engine · TX

Experience a total engine stall while stopped/accelerating at an intersection. The stall triggered immediate 'EyeSight Disabled' and 'Engine Oil' dashboard warnings, requiring a manual button restart in traffic. Had concerns of permanently being stalled in intersection. Taking to dealer for inspection.

Filed Sep 19, 2026 · Electrical, Engine · WA · fire

Smoke and fire occurred in the engine and spread into the car while the car was being driven. The car has not been inspected yet.

Filed Sep 13, 2026 · Engine · CA

Three times within 30 minutes on short drive, the engine stalled at stop sign or stop light. The car had a half tank of gas, and at the same time as the engine stalled, the miles remaining until empty display showed an anomalous 0.3miles to empty reading. Put the car in park allowed the engine to restart and the range remaining display to return to normal.

Filed Sep 10, 2026 · Engine, Transmission · MI

Component/System Defect: Failed Thermo Control Valve (TCV) leading to sudden vehicle power loss / limp mode. Description of Safety Incident: While operating my vehicle at highway speeds late at night, the Thermo Control Valve (TCV) failed catastrophically without warning. The vehicle instantly experienced a massive loss of engine power and entered an aggressive "limp mode," causing a drastic, uncommanded deceleration in active traffic lanes.Due to the sudden reduction in speed and the low-visibility night conditions, a commercial semi-truck traveling directly behind my vehicle was nearly unable to brake in time and narrowly avoided rear-ending us. My family—including an elderly senior and a [XXX] child—was trapped inside the vehicle during this near-miss collision. The vehicle became an immediate hazard on a high-speed highway. The authorized dealership subsequently confirmed a failed Thermo Control Valve (TCV) and replaced the unit under Subaru's extended warranty program. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 5, 2026 · Engine · NJ

Car stalls when it shouldn't i.e. when stopped at traffic light Transmission Control Module (TCM) Software Issue

Filed Aug 27, 2026 · Electrical, Engine · IL

24th February 2020 - Bought the car from Subaru dealer. Couple of service records prior to May 24, 2022. - May 24, 2022 (9,037 miles) | RO# 806326: The lower oil pan leaked prematurely and had to be completely replaced under warranty. During the same visit, explained LONG BRAKE PEDAL issue, and was given an estimate. - - June 1, 2022 (9,039 miles) | RO# 806767: Just 2 miles after that repair, the oil pan had to be torn apart again because the internal oil level sensor failed and got stuck. - January 19, 2024 (18,854 miles) | RO# 838995: The vehicle suffered a dangerous engine shutdown in the middle of traffic due to the factory Thermo Control Valve defect (TSB 09-80-21). While resolving this safety defect under warranty, the dealer used scare tactics to upsell me $794.23 out of pocket for unrelated maintenance. - July 3rd, 2025 - You can see from invoice records that indicate, customer requesting a quote on repairing the windshield chips, as I learned on 26th August 2026 (during call with Subaru corporate) that it was under extended warranty, dealership offered me a quote and did not volunteer to repair at no cost nor conveyed information on extended warranty. This damage happened twice due to poor quality of Windshield in my car. - 23rd August, 2026 - This 2020 Subaru Forester has experienced repeated failures involving the Auto Start/Stop system. When stopped in traffic, the system shuts the engine off as designed, but on multiple occasions the engine has failed to restart normally when the driver needed to proceed. This has left the vehicle unable to move in active traffic and created a serious risk of collision. The failures have occurred in highly dangerous situations. - 24th August, 2026 - Similar incident happened the next day. - 25th August 2026 (39,000 miles) | Present Day: The lower oil pan seal has failed yet again. Dealership is suggesting a battery replacement. Shared inspection video shows, rusts on bolts, very unusual for a car driven only 39000.

Filed Aug 19, 2026 · Electrical, Engine · CA

This 2020 Subaru Forester has experienced repeated failures involving the Auto Start/Stop system. When stopped in traffic, the system shuts the engine off as designed, but on multiple occasions the engine has failed to restart normally when the driver needed to proceed. This has left the vehicle unable to move in active traffic and created a serious risk of collision. The failures have occurred in highly dangerous situations, including a busy [XXX], a major [XXX] intersection, and most recently while entering a freeway. In these incidents, surrounding drivers had to brake hard to avoid striking the disabled vehicle. The occupants reasonably feared a serious collision, and the events were potentially life-threatening. The battery was replaced, but the Auto Start/Stop no-restart condition later occurred again, so battery replacement did not resolve the problem. Subaru issued Technical Service Bulletin 16-147-24 on XXX for 2019-2021 Foresters. The bulletin addresses TCM reprogramming related to engine behavior during Auto Start/Stop restart and instructs technicians to reprogram the TCM when the described symptom is reported. However, the bulletin’s warranty section provides reimbursement under the Basic New Car Limited Warranty. For a 2020 vehicle, the original 3-year/36,000-mile basic warranty would ordinarily have expired before this 2024 bulletin was issued. The vehicle is now being evaluated by an authorized Subaru dealer. The condition is intermittent and dangerous because the driver cannot know whether the engine will restart when movement is required. The vehicle is available for inspection. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 17, 2026 · Engine · CO

My 2020 Subaru Forester Sport suffered catastrophic engine failure on 6/19/2026 at 156,322 miles, 15 days and 1,031 miles after a thermo control valve (TCV) repair performed at an authorized Subaru dealer on 6/4/2026. The TCV is a known defect covered under Subaru TSB 09-119-24 (extended coverage to 150,000 miles/15 years). I never received mailed notification of this TSB and therefore did not seek repair within the covered window; Subaru approved the repair as a goodwill exception. While driving on I-70 westbound near Genesee, CO, on a sustained mountain grade with my family in the vehicle, I heard a loud noise. The oil temperature spiked to approximately 280°F, warning lights illuminated, and the vehicle lost all power in highway traffic. Losing propulsion on a steep grade in mountain traffic created a serious risk to my family and surrounding vehicles. Post-failure condition: empty coolant reservoir, coolant-contaminated (milky, green-tinted) oil, and metal debris on the dipstick, consistent with cooling-system failure causing engine seizure. I have timestamped photos. The engine is locked and the vehicle inoperable. The vehicle was towed to the same authorized dealer on 7/9/2026. The dealer's technician confirmed the engine is seized and requires teardown ($3,302.95) for full diagnosis; the dealer states teardown proceeds only on authorization from me or Subaru of America. I opened a case with Subaru of America on 5/26/2026 and formally requested in writing that Subaru authorize the teardown, with a stated deadline. As of 7/17/2026, the dealer confirms Subaru has sent no authorization or any communication during the week the vehicle has been on their lot. My written deadline, follow-up call, and final written notice went unanswered. The vehicle and all components are preserved at the dealer and available for inspection upon request.

Filed Jul 13, 2026 · Electrical, Engine · NY

My car is violently shaking and completely stalling out in intersections when attempting to restart from an Auto-Stop.