Subaru Crosstrek Battery: Specs, Fitment & Common Faults
A genuinely useful piece of context worth knowing about Subaru's connected services: the Data Communication Module has been documented as a confirmed cause of flat batteries after extended standing.
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OEM Part Number: 82110AA012
| 2016, genuine reference (shared with BRZ, Forester, Impreza, STI, WRX) | Subaru OEM: 82110AA012 — 55D23L MF |
|---|---|
| 2020 onwards, genuine reference | Subaru OEM: 82110FJ002 |
| 2.0L CVT, per Subaru's own service manual | 75D23L, 470A, 53Ah |
| Manual transmission, per Subaru's own service manual | 55D23L, 390A, 40Ah |
Subaru Crosstrek Battery: The Part Everyone Blames First, Not Always Correctly
On the Subaru Crosstrek, the battery takes the blame for most no-start situations, and often rightly so — it's a sensible first check. But it isn't always the genuine cause, which is worth establishing before paying for a new one that turns out not to solve anything.
Subaru Crosstrek Battery: What It Does
The Subaru Crosstrek's 12V battery handles engine starts and keeps electrical systems running whenever the engine isn't. On stop-start versions, that job gets much harder, since the engine switches off and restarts constantly — which is why it specifically needs an AGM or EFB battery, not a standard one.
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A Genuinely Useful Piece of Context Worth Knowing About Subaru's Connected Services — Subaru Crosstrek Battery
If your battery keeps going flat after the car has sat unused for around ten days or more, this is genuinely worth knowing: the Data Communication Module, responsible for connected services on related Subaru models, has been documented as a confirmed cause of exactly this pattern, still affecting cars as recent as the 2024 model year on some related models. It's worth asking a dealer directly and specifically about this component if you're facing a similar drain, rather than only being told to check for more generic parasitic drains.
It's also genuinely worth knowing that a dealer dismissing a recurring battery issue as simply "not driving the car enough" doesn't necessarily rule out a genuine fault, particularly if your usage pattern hasn't meaningfully changed from a previous car that never had the same problem.
Subaru Crosstrek Battery: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Battery Guide for warning signs to watch for, confirming fitment against your VIN, and matching the right technology (standard, EFB, AGM) when buying aftermarket.
More Subaru Battery
The same part, covered across other Subaru models.