2021 Subaru Outback — Known Issues & Recalls

Your airbag warning light is on even though the airbags haven't deployed. A diagnostic scanner shows error code B1784, which indicates a problem with the right front occupant detection sensor. Subaru has issued a safety recall for this exact issue on your model year, but your vehicle's VIN isn't showing as eligible for the recall, and the dealer says they can't help. The fix would likely involve replacing or recalibrating the occupant detection sensor, though you may need to work with Subaru customer service or explore other repair options.

Your 2021 Subaru Outback is subject to a safety recall (Campaign 24V227000) involving the airbag system, but the replacement parts needed for the repair are currently unavailable from your dealer. You've notified Subaru that the delay has exceeded a reasonable timeframe, though you haven't experienced any airbag failure yet. The repair will likely involve replacing or reprogramming airbag system components once parts become available.

Your 2021 Subaru Outback is subject to a recall (Campaign 24V227000) for the airbag system, but the manufacturer hasn't yet released the parts needed to fix it. Your dealer has confirmed the parts aren't available and you've been waiting longer than expected for this recall to be completed. The manufacturer is aware of the delay, though you haven't experienced any actual airbag failure yet. The fix will involve installing replacement airbag components once the manufacturer makes them available.

Your 2021 Subaru Outback is subject to a safety recall (Campaign 24V227000) affecting the airbags, but the replacement parts aren't currently available from the manufacturer. You've been waiting longer than expected for the recall repair to be completed, and your dealer has confirmed the parts remain unavailable. The manufacturer is aware of the delay. Your airbags are currently functioning normally, but you'll need replacement airbag components once they become available.

Your 2021 Subaru Outback is subject to a safety recall (NHTSA Campaign 24V227000) for the airbag system, but the manufacturer hasn't yet made the replacement parts available. You've notified both the dealer and Subaru about the delay, and they've confirmed parts are still unavailable. While you haven't experienced an actual airbag failure yet, the repair will likely involve replacing one or more airbag components once they become available.

Your 2021 Subaru Outback is part of a recall (Campaign 24V227000) affecting airbags, but the replacement part needed for the repair is currently unavailable from the manufacturer. You've been waiting longer than what you consider reasonable for the part to become available, and Subaru is aware of the situation. Your airbags are still functioning normally at this time. The repair will involve replacing the affected airbag component once the part is back in stock.

Your 2021 Subaru Outback is subject to a safety recall (Campaign 24V227000) for the airbag system, but the replacement parts aren't currently available from the dealer. You haven't experienced an actual airbag failure, but Subaru has taken longer than expected to supply the parts needed to complete the repair.

Your airbag warning light came on while driving, and you heard a chime with a passenger in the front seat. Your dealer informed you that a required recall repair part isn't yet available, and the manufacturer hasn't been able to complete the repair despite what you feel is an unreasonable delay. The airbag system should be inspected and the recall part installed once it becomes available from the manufacturer.

Your car shut off at a stop sign due to the auto start/stop feature, but then wouldn't restart because the battery was dead. You were left stranded in an intersection. The battery needed to be replaced to get the car running again.

Your rear driver's side window shattered unexpectedly while you were driving at 35-40 mph with no external impact. This is concerning because similar incidents have reportedly occurred on other Subaru models, and a passenger sitting near the window could have been injured by the breaking glass.

Your 2021 Subaru Outback has experienced four sudden engine failures over approximately 20 months, with the most recent occurring in March 2026, causing complete loss of power without warning — including twice at highway speeds (65–75 mph), creating a safety hazard. The vehicle has been repaired or replaced under warranty multiple times by an authorized Subaru dealership, but the root cause remains unidentified even after multiple inspections. Additionally, the most recent failure involved an oil-saturated catalytic converter, and a broken axle was discovered during a third inspection. The fix may require a complete engine replacement and thorough diagnostic testing, though Subaru has been unable to determine what's causing these recurring failures.

Your car's back-over prevention system may have malfunctioned while you were backing up slowly in a parking lot. Even though you had your foot on the brake pedal, the car suddenly accelerated and hit a cement walkway and metal railing. After the collision, the car shifted into drive and operated normally. The dealership was unable to retrieve diagnostic data from the vehicle to determine what caused the unexpected acceleration.

Your sunroof spontaneously shattered while driving in clear, hot weather (90°F), making a loud noise that startled you and caused you to swerve into another lane. The sunroof required replacement at an auto glass shop. You've found reports online suggesting this problem occurs relatively frequently with this model.

Your car suddenly accelerated to about 2000 rpm while you were backing out of your garage and turning, even though your foot was firmly on the brake pedal and nowhere near the accelerator. You had to press hard on the brake to stop the car before hitting a tree. There were no floor mats or objects blocking the pedals. The dealer will need to diagnose why the engine revved unexpectedly while braking.

While your 2021 Subaru Outback was idling at a red light, it lurched forward twice without warning and hit the vehicle in front of you. Several warning lights came on after the impact, but your airbags did not deploy. The dealer hasn't diagnosed or repaired the issue yet, but Subaru has been notified and plans to send a technician to check your vehicle's data recorder. A repair would likely involve diagnosing the transmission or cruise control system that may have caused the unexpected acceleration.

While slowly backing out of a parking space, your car suddenly accelerated on its own and rapidly reversed into 4 parked cars. You don't recall pressing the accelerator, and the engine surged without responding to braking. No warning lights appeared on the dashboard, and neither EyeSight nor adaptive cruise control were active at the time. This suggests a potential issue with unintended acceleration during low-speed maneuvers that may require diagnostic evaluation of the throttle control system and engine management.

Your 2021 Outback has stopped running and needs a transmission replacement, but you've noticed the previous owner had the fuel pump replaced twice at roughly 20,000-mile intervals — and you're now approaching another 20,000 miles since the last replacement. Your warranty company is refusing to cover the repair. The issue may involve replacing the fuel pump again, the transmission, or diagnosing why the vehicle won't start.

Your car's wheel bearings failed at 55,000 miles, which is earlier than typical for a vehicle of this age. This could cause noise, vibration, or handling problems. Replacing the failed wheel bearings will likely involve removing the wheel and installing new bearing assemblies.

Your car stalled while driving at 55 MPH, and the check engine light came on along with an "Eyesight" warning message. The dealer found that the thermal control valve had failed and replaced it to fix the problem. This happened at 18,640 miles, and the manufacturer has noted it under extended warranty coverage.

Your check engine light is on due to a thermostat control valve issue, and your EyeSight safety features (adaptive cruise control, automatic emergency braking, blind spot warning, forward collision warning, lane departure warning, and lane keeping assistance) are not functioning properly. The diagnostic code P2682 has been identified. Your dealership indicated that while there is a recall available, it doesn't apply to your vehicle's VIN number. The fix will likely involve replacing the thermostat control valve and having the safety system recalibrated or repaired by a Subaru dealer.