2021 Subaru Legacy problems and complaints
Owners have filed 31 complaints with NHTSA about the 2021 Subaru Legacy. The most-reported areas: Unknown Or Other (7), Air Bags (6), Electrical System (5).
Key takeaways
- 31 owner complaints on file with NHTSA.
- 0 involve a crash, 0 a fire, 1 reported injury.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Unknown Or Other | 7 | 23% |
| Air Bags | 6 | 19% |
| Electrical System | 5 | 16% |
| Visibility/Wiper | 5 | 16% |
| Engine | 2 | 6% |
| Power Train | 2 | 6% |
| Back Over Prevention | 2 | 6% |
| Service Brakes | 2 | 6% |
| Forward Collision Avoidance | 2 | 6% |
| Suspension | 1 | 3% |
| Engine And Engine Cooling | 1 | 3% |
| Seats | 1 | 3% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Subaru Legacy 4 DR AWD | 5/5 | 5/5 | 5/5 | 5/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Engine - filed 2026-06-04
Vehicle: 2021 Subaru Legacy Base 2.5i Mileage:~65,000 miles My engine suddenly began making loud internal knocking/tapping noises with no warning lights, no overheating, and no prior symptoms. The vehicle immediately became unsafe to operate. I had it towed to a Subaru dealership, where technicians confirmed the noise ...
Suspension - filed 2025-11-24
See attached document for complaint.
Power Train - filed 2025-11-21
Car intermittently will studder and not go into first gear or go into second gear dangerously having car bog down and almost stall and then it violently downshifts having car RMP Hague go very high then slip and have no power to wheels and then a few seconds later go into second gear violently taking off again. Have tr...
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More for the 2021 Subaru Legacy
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.