2021 Subaru Legacy Electrical system Problems
- Complaints
- 5about this part
- Share
- 16%of 31 total for the year
- Median mileage
- 60,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the electrical system of the 2021 Subaru Legacy, 16% of the 31 complaints for this model year. Where a mileage was given, the median is 60,000 miles.
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.
“There seems to be an issue with the infotainment system. The system will randomly turn off which also turns off the safety features. I would like to associate this while CarPlay is in use, but I have witnessed it happen without CarPlay. Subaru has already replaced the head unit under warranty, but the problem continues. For the cost of the car, this should not be an issue.”
NHTSA complaint #11432643, filed 2021-09“Battery died completely, left me stranded at a gas station. I had to call and get a jump. I've had the car 9 weeks, it only has 690 miles on it. No warning lights prior, did notice a slightly longer crank a couple days prior. I was told by the dealer that I don't drive enough, and I should keep my key at least 30 feet away when the keys are in the house, because that can silently drain the battery. I had not left any lights on or had done anything to drain the battery prior to this occurring. I drove to the gas station with no problem, upon restarting after getting gas, no power, car was dead. …”
NHTSA complaint #11435081, filed 2021-10“The contact owns a 2021 Subaru Legacy. The contact stated that while driving at various speeds during colder weather, the heater failed to operate as intended. Additionally, the Eyesight system was inoperable. The check engine and other unknown warning lights were displayed. In addition, the contact stated that the engine failed to warm up as intended after being started, and the engine temperature was 107°F, which was below the normal engine temperature of 200°F. …”
NHTSA complaint #11695854, filed 2025-10, 60,000 miles“ODS sensor recall still not fixed/remedy available, used heat for first time since i purchased the car, minor cracks in the windshield, car radio/monitors randomly go black, reverse camera won’t work, restarts on there own after a while”
NHTSA complaint #11623360, filed 2024-11Related service bulletins
- 11037943Oct 5, 2026This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
- 11037942Sep 28, 2026This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
- 11037938Sep 18, 2026"This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circuit"
- 11037929Sep 14, 2026This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. This is an revised version of the…
- 11037928Sep 14, 2026In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed…
- 11037927Sep 14, 2026This bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns. This is an revised version of the…
- 11036823Aug 31, 2026This bulletin announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4 Denso CP1 Audio and Navigation head units…
- 11036804Aug 21, 2026This Announcement provides diagnostic assistance for CVT issues.
- 11036807Aug 20, 2026This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current) in vehicles experiencing battery drain when the ignition is…
- 11036796Aug 13, 2026This Bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns. (This is an revised version of the…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 5 | 29% |
| 2023 | 1 | 10% |
| 2022 | 3 | 9% |
| 2021 | 5 | 16% |
| 2020 | 15 | 12% |
| 2019 | 35 | 28% |
| 2018 | 40 | 34% |
| 2017 | 30 | 25% |
| 2016 | 51 | 35% |
| 2015 | 37 | 23% |
| 2014 | 11 | 21% |
| 2013 | 6 | 9% |
| 2012 | 4 | 4% |
| 2011 | 19 | 11% |
| 2010 | 12 | 8% |
| 2009 | 4 | 6% |
| 2008 | 9 | 14% |
| 2007 | 5 | 15% |
| 2006 | 17 | 20% |
| 2005 | 25 | 14% |
| 2004 | 1 | 2% |
| 2003 | 2 | 3% |
| 2002 | 2 | 4% |
| 2001 | 1 | 1% |
| 2000 | 6 | 6% |
| 1999 | 2 | 2% |
| 1998 | 9 | 8% |
| 1997 | 17 | 12% |
| 1996 | 21 | 17% |
| 1995 | 20 | 11% |
| 1994 | 1 | 2% |
| 1993 | 3 | 4% |
| 1992 | 3 | 5% |
| 1991 | 3 | 4% |
| 1990 | 1 | 1% |
Other parts of the 2021 Subaru Legacy
7 complaintsAir bags
6 complaintsVisibility (wipers, defrost, mirrors)
6 complaintsBack-over prevention (rear camera)
2 complaintsBrakes
2 complaintsEngine
2 complaintsForward collision avoidance
2 complaintsTransmission and drivetrain
2 complaintsEngine cooling
1 complaintsEquipment
1 complaintsSeat belts
1 complaintsSeats
1 complaints
← All problems reported for the 2021 Subaru Legacy
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