2021 Subaru Crosstrek Transmission Problems

Your car rolled down a hill and crashed after coming out of park while the engine was running, even though you didn't shift it. You had forgotten to set the parking brake, but you believe the car should have remained in park regardless. To determine if there was a mechanical defect, you'll need a professional inspection of the transmission, parking pawl mechanism, and related drivetrain components.

Your car may experience a binding or lurching feeling in the drivetrain that makes it feel unstable, particularly in slippery conditions. This is typically caused by a failing viscous coupler, which can reduce traction, cause uneven power distribution between wheels, or suddenly engage too aggressively — potentially leading to loss of control. The problem may not trigger any warning lights before it fails. Replacing the viscous coupler is necessary to restore proper all-wheel-drive function and vehicle stability.

Your check engine light came on while the car was idling, which caused your Eyesight safety system and related safety features to turn off. The next day, your car had trouble starting, and then at a stop sign, when you released the brake and pressed the gas, the car rolled forward as if it were in neutral and jolted up and down repeatedly. This combination of issues suggests a problem with the engine or transmission that's affecting both performance and your safety systems.

When slowing down the vehicle almost down shifts causing it to lurch forward. Notified Subaru and took to 2 dealers which were all no help. Subaru of America did NOTHING to assist

Check engine light. Code showing P2682 and P26a3. There is an issue with the Thermo Control Valve for the MY21 Crosstrek. This is also affecting the Forester and Outback. See this thread: https://www.subaruforester.org/threads/2019-thermo-control-valve-assembly-and-warranty-merged-thread.823510/ Subaru should replace and install the new part regardless if the vehicle is no longer under warranty if a customer TCV has issues. There are customers who have had to pay anywhere between $1500-$2000+ to have this fixed/replace by the Subaru dealer.

DRIVE TRAIN, TRANSMISSION ISSUE. CAR WAS RUNNING, IN PARK. I GOT OUT TO PICK UP A FLYER FROM YARD. CAR ACCELERATED AND DROVE THROUGH GARAGE DOOR, AND CRASHED INTO THE BACK WALL OF GARAGE. NO ONE HAS INSPECTED THE CAR, AS IT HAPPENED LATE YESTERDAY. WILL CONTACT DEALERSHIP TODAY. NO SYMPTOMS PRIOR.

Transmission was about to fail. Car started making noise at low speeds in drive and reverse about 2-3 weeks ago, so I brought it in and mentioned the noise to the service advisor. There were no warning lights, messages on the dash indicating a problem. Confirmed by a Subaru dealer as needing to be fully replaced.

The contact owns a 2021 Subaru Crosstrek. The contact stated while driving 20 MPH, while downshifting gears the vehicle failed to accelerate. The contact stated no warning light was illuminated. The contact took the vehicle to the local dealer who was unable to duplicate the failure. The contact stated he continued experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was unknown.

Problem 1)Had my '21 Sport for 7 days. Started stalling few times when shifting from P to R while on a slight incline (dash lights up like in Acc mode) after driving it for about 30 min before and then turning it off to go inside of the store, etc. after about 2-5 minutes of idling, the car engine stopped like I was in auto stop, but didn’t kick back on when I shift gears to reverse or when I applied gas. But then I hit the on/off button and engine turns over just fine. Problem 2) But today it started making a whirring sound with difficulty accelerating & quick decelerating/speed drop off upon release of gas, even when going down a big hill. It felt like resistance and pulling feeling almost? Like how a car feels when It doesn’t want to shift. Also felt a little jittery the longer I drove & loud clunk shifting gears. Got louder when I would press on the gas more. It continued even after starting the car again when leaving my location. It wasn’t doing it before yesterday, and then while positioning the car for the tow truck. But the back up cam started going crazy at me like I was about to hit something??? But nothing was there. Then eyesight was “disabled, check manual” a couple times today upon starting it. But no codes thrown thrown outside of the eyesight thing. I’ve seen a transmission issues and stalling and ECU issues with the 2018 & 2019 but quite a few people on Facebook and Reddit similar issues in '21. Dealer found no codes and couldn't recreate it so they told me to come get it.

I have been experiencing shuddering/jerking/hesitation in my vehicle since July. The dealership has had it in their service department several times and cannot diagnose the issue. Subaru of America was contacted and gave no resolution to repairing the vehicle. They did not inspect the vehicle, rather gathered the "data" from the dealership. The shuddering/jerking/hesitation happens from a start to stop position and is incredibly dangerous when pulling out into traffic or crossing over lanes in a left hand turn. This malfunction can cause a collision and is a huge safety concern of mine. I do not feel comfortable putting my life at risk driving this vehicle. The dealership has only tested the CVT transmission and ran "data" and cannot seem to tell me what is wrong with the vehicle, though there is clearly an issue, whether it is the CVT transmission or another component of the vehicle. I see several similar complaints on the NHTSA website for the Crosstrek dating back to 2015. I am confused as to why the manufacturer is not being held responsible for a defect that is so dangerous. Is it going to take someone getting seriously injured or a death before this is investigated? I encourage other Crosstrek owners to come forward and report similar issues you are having to NHTSA.

SHUDDERING - CVT belt or pulley not working properly? JERKING, HESITATION - Crosstrek will not go when the gas pedal is pressed or hesitates or pauses for a moment after the gas pedal is engaged