12V Auxiliary Battery Specifications
This is the small 12V battery that powers the car’s electronics — not the high-voltage traction battery. Always confirm the exact part for your build with a dealer.
| Parameter | Specification |
|---|---|
| Battery role | 12V auxiliary (electronics) |
| Group / Type | Group 51R (Type 012) |
| Type | Standard lead-acid |
| Capacity | ~40 Ah |
| Cold Cranking Amps | ~390 CCA |
| Location | Engine bay |
| Note | Main drive battery is sealed and not user-serviceable; confirm the 12V part with a Nissan dealer |
Recommended Batteries for Nissan Leaf
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Frequently Asked Questions
Does the Nissan Leaf have a 12V battery?
Yes, the Nissan Leaf has a 12V auxiliary battery that powers accessories, lights, and onboard electronics separately from the main traction battery.
How long does a Nissan Leaf 12V battery last?
The Nissan Leaf 12V auxiliary battery typically lasts 3-4 years and should be checked annually during servicing.
What size 12V battery does a Nissan Leaf need?
The Nissan Leaf uses a Group 51R 12V battery. Always check your specific model year for the exact specification.
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →