2021 Subaru Outback Transmission and drivetrain Problems
- Complaints
- 12about this part
- Share
- 4%of 298 total for the year
- Median mileage
- 27,400miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 12 complaints about the transmission and drivetrain of the 2021 Subaru Outback, 4% of the 298 complaints for this model year. Where a mileage was given, the median is 27,400 miles. 1 of these say a crash was involved, according to the filers. 3 recall campaigns on record are filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have had this happen several times on my 2021 Outback and my 2013 Outback. The dealership has never been able to recreate this issue. I will be driving (gear in D) and it randomly shifts to 1st or 2nd gear. I have been in a parking lot when it has happened or entering the interstate. I notice it because I hear the engine roar and look down to see it shifted gears. I only use D so this should never happen.”
NHTSA complaint #11633759, filed 2025-01“I was driving and suddenly 13 flashing lights and codes from check engine to loss of cruise control and RAB -dealer says it needs a new thermo control valve (thermostat). This failed part has been common on Subarus for 3 years-reported on internet and even to the point where a guy sitting next to me today with same car and year and same $1800 bill and diagnosis. Should be a recall. Part was redesigned in 2022 I read.”
NHTSA complaint #11543033, filed 2023-09“Good Day! I bought my 2021 Subaru Outback XT Onyx in Jan 2021. I had waiting 6 yrs for Subaru to use the Turbo Motor in the Outback again. I've had this car for 5 years with my warranty running out Jan 2026, but I only drive 5000-7000 miles per/yr. Current odometer is 29,901 miles. At my most recent oil change service at the Dealer, they showed me a video of my cars drivetrain from underneath. There were two bad seal leaks. One at the transmission pump housing and the other at the Upper Oil Pan. …”
NHTSA complaint #11758285, filed 2026-08“I walked outside my house yesterday morning to find my 2021 Outback XT idling in the driveway. I may have failed to turn the engine off, or it may have started itself. Nonetheless, I calculate that it burned about five gallons of gasoline and probably ran all night. The car should not be able to run for hours on end! This is a clear problem--an overheated catalytic converter could start a fire, someone could have jumped in and driven away, or--much worse--it could have been running in an enclosed area and filled it with CO.. …”
NHTSA complaint #11457634, filed 2022-03“Purchased used with just over 60k miles & have had less than a year. Vehicle still under 80k miles. Told transmission needs replaced but found service records from previous owner which shows fuel pump replaced twice at about 20k mile intervals & I am just under 20k miles past previous pump replacement. Vehicle does not run at the moment & warranty company refusing to help.”
NHTSA complaint #11654281, filed 2025-04Related recalls
- 23V755000Nov 9, 2023Subaru of America, Inc. is recalling certain model year 2021 Crosstrek, 2022 Forester, 2021-2023 Legacy, and Outback vehicles. An insufficient weld may allow…Covers: Subaru Outback 2021–2023, Legacy 2021–2023, Crosstrek 2021 +1 more
- 22V485000Jul 8, 2022Subaru of America, Inc. (Subaru) is recalling certain 2020-2021 Outback and Legacy vehicles. A programming error in the Transmission Control Unit (TCU) may…Covers: Subaru Outback 2020–2021, Legacy 2020–2021
- 21V024000Jan 26, 2021Subaru of America, Inc. (Subaru) is recalling certain 2021 Outback and Impreza vehicles. The continuously variable transmission (CVT) select lever cable nut…Covers: Subaru Outback 2021, Impreza 2021
Related service bulletins
- 11037942Sep 28, 2026This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
- 11036804Aug 21, 2026This Announcement provides diagnostic assistance for CVT issues.
- 11036814Aug 20, 2026This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR580 model CVT transmissions used in the models listed.
- 11036809Aug 20, 2026This Service Information Bulletin announces the release of a new diagnostic assistance application for TR690 and TR580 CVT-equipped vehicles. This is an revised version of the…
- 11036808Aug 20, 2026This bulletin announces availability of new reprogramming files developed to address SYMPTOM 1: A jerk or judder sensation felt from the powertrain during braking with the air…
- 11036806Aug 20, 2026This Bulletin provides updated diagnostic procedures to follow and a brief questionnaire to complete when diagnosing an alleged Chain Slip condition on the TR580 and TR690 model…
- 11034271Jun 5, 2026This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR690 model CVT transmissions used in the models listed. (This is an…
- 11033077May 28, 2026This Bulletin announces a correction to the diagnostic procedures for certain CVT related DTCs, including P0730, P0746, P0747, P0841, P0846, P0867, P1867, P1894, and P2723.
- 11033061May 12, 2026This bulletin announces a design change to the TR690 CVT control valve body which features an enhanced line pressure sensor O-ring, designed to prevent abnormal sensor readings…
- 11033056May 4, 2026This announcement provides information on the remanufactured CVT transmission program.
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 5% |
| 2025 | 5 | 6% |
| 2024 | 6 | 6% |
| 2023 | 5 | 6% |
| 2022 | 18 | 4% |
| 2021 | 12 | 4% |
| 2020 | 48 | 5% |
| 2019 | 16 | 2% |
| 2018 | 14 | 2% |
| 2017 | 47 | 5% |
| 2016 | 45 | 7% |
| 2015 | 37 | 7% |
| 2014 | 25 | 12% |
| 2013 | 60 | 20% |
| 2012 | 108 | 37% |
| 2011 | 216 | 33% |
| 2010 | 94 | 26% |
| 2009 | 8 | 8% |
| 2008 | 12 | 5% |
| 2007 | 9 | 7% |
| 2006 | 17 | 6% |
| 2005 | 17 | 6% |
| 2004 | 10 | 11% |
| 2003 | 13 | 14% |
| 2002 | 20 | 14% |
| 2001 | 23 | 13% |
| 2000 | 42 | 20% |
| 1999 | 29 | 26% |
| 1998 | 19 | 15% |
| 1997 | 8 | 10% |
| 1996 | 5 | 11% |
Other parts of the 2021 Subaru Outback
107 complaintsElectrical system
76 complaintsOther or unknown
66 complaintsForward collision avoidance
29 complaintsEngine
21 complaintsVehicle speed control
19 complaintsAir bags
16 complaintsFuel system
10 complaintsBrakes
8 complaintsLane departure
7 complaintsBody and structure
7 complaintsWheels
6 complaints
← All problems reported for the 2021 Subaru Outback
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology