2021 Subaru Outback electrical problems
75 of the 296 complaints owners filed with NHTSA about the 2021 Subaru Outback name the electrical system (NHTSA’s “Electrical System” heading — wiring, modules, batteries, charging, infotainment and driver displays — NHTSA's broadest heading). Filed under the same heading: 280 manufacturer bulletins. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the electrical system
Source: NHTSA complaint database2 of the 75 reports a crash · 1 a fire · 1 injury. Self-reported, unverified.
Filed per year: 2021: 27 · 2022: 17 · 2023: 16 · 2024: 9 · 2025: 2 · 2026: 4
Half of the 12 owners who gave an odometer reading reported the electrical problem between 1,000 and 11,000 miles. A median of reports, not the life of a part.
296 complaints in all about the 2021 Subaru Outback, 4 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Electrical System” means the same area of the vehicle, not one fault.
Across model years: Subaru Outback electrical problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the electrical system. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
We bought this car new about 3 weeks ago and tried to drive it this morning to find it completely dead. It was last driven about 60 hours ago. It has just over 1,000 miles on it. There was no warning lamp that came on when we last drove the car.
My Subaru battery was completely dead after only having it for 3 months and 700 miles on odometer. I was left stranded due to not being able to start vehicle. Vehicle was towed to dealer. Dealer took 2 day to diagnose that the battery was bad and they replaced battery. Dealer claims the passenger map light was left on.
The contact owns a 2021 Subaru Outback. The contact stated that the battery had fully drained and was recharged two times. There was no warning light illuminated. The third time the vehicle was towed to an unknown mechanic and was diagnosed with needing the battery to be replaced. The vehicle was repaired.
After 5000 miles my battery has been drained and is currently dead. I was told I must lock it every time I AM not driving to ensure battery life is extended. Even with doing this battery is still dead after barely 5000 miles
I bought this 2021 Subaru Outback in jan 2, 2021. In mid feb, I drove the Outback to lake tahoe. On my way, I went to costco gas station for gas after 1 hour highway driving. The car was just dead after refueling. I called roadside assistance not knowing what happened. The car was jumpstarted.
What is on file about the electrical system
Source: NHTSA recalls, investigations and manufacturer communications280 manufacturer bulletins filed under this heading
- 15-261-20R Service bulletinAug 31, 2026
- This 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 utilized in the models listed. This is an revised version of the original bulletin.
- SubaruNet Announcement (C OtherAug 21, 2026
- This Announcement provides diagnostic assistance for CVT issues.
- 15-308-23R Service bulletinAug 20, 2026
- This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current) in vehicles experiencing battery drain when the ignition is off, leading to no-start conditions or frequent jump-starts. This is an revised version of the original bulletin.
The 3 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
B2A16 P0087 P2404 B1788 B2256 B2A20 P0016 P0017
Codes a bulletin or an owner’s complaint about the 2021 Subaru Outback names on this model year; a code with a record of its own links it.
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre electrical problems common on the 2021 Subaru Outback?
They are documented: NHTSA holds 75 owner complaints naming the electrical system on this model year (25% of everything owners filed about it), and 280 manufacturer bulletins are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the electrical system on the 2021 Subaru Outback?
No recall campaign is filed under this heading for this model year (there are 4 filed under other headings). A bulletin is not a recall: it carries no federal duty to repair for free.
When do electrical problems show up on the 2021 Subaru Outback?
Owners who gave an odometer reading reported it at a median of 2,500 miles; half of them between 1,000 and 11,000. That is when reports cluster, not the life of a part.
What does NHTSA's "Electrical System" heading cover?
Wiring, modules, batteries, charging, infotainment and driver displays — NHTSA's broadest heading. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.