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Most common fit — Mazda Mazda3: Bosch S4/S5 Q85 (D23) — 65Ah 650CCA, EFB (i-stop). Bosch S4/S5 Q85 (D23) — check price on Amazon
Fitment varies by engine and build date — other variants are listed below.
Battery Specifications
| Parameter | Specification |
|---|---|
| Battery Group | Q85 (D23) |
| Type | EFB (i-stop) |
| Capacity | 65 Ah |
| Cold Cranking Amps | 650 CCA |
| Dimensions | 232 x 173 x 225 mm |
| Terminal Type | Top post |
| Start-Stop Compatible | Required (i-stop) |
Standard or EFB depending on i-stop option
Recommended Batteries for Mazda Mazda3
Varta Blue/Silver Q85 (D23)
Yuasa YBX7005 (Q85 / D23 EFB)
Frequently Asked Questions
What battery does a Mazda Mazda3 need?
The Mazda Mazda3 (BP) needs an EFB Q85 (D23 case) battery — 65Ah, ~650 CCA — required for its i-stop system (cold cranking amps).
Does the Mazda Mazda3 need an AGM or EFB battery?
The Mazda3 has i-stop, so it needs an EFB battery (Q85 / D23 case) — a standard lead-acid battery isn’t suitable.
How long does a Mazda Mazda3 battery last?
Typically 4–6 years depending on driving patterns. Short urban journeys and cold winters reduce battery life.
Can I replace the Mazda Mazda3 battery myself?
Yes for most models — it’s usually located in the engine bay. Disconnect the negative terminal first, then the positive. Fit the new battery in reverse order.
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 →