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Most common fit — Mazda CX-5: Bosch S4 E (EFB) — Bosch’s EFB line is S4 E, not S5 — ~65–70Ah ~670CCA, EFB (Q85). Bosch S4 E (EFB) — Bosch’s EFB line is S4 E, not S5 — check price on Amazon
Fitment varies by engine and build date — other variants are listed below.
Battery Specifications
| Parameter | Specification |
|---|---|
| Battery Group | JIS D23 (Q85 EFB) |
| Type | EFB (Q85) |
| Capacity | ~65–70Ah |
| Cold Cranking Amps | ~670 CCA |
| Dimensions | 232 x 173 x 225 mm |
| Terminal Type | Top post |
| Start-Stop Compatible | Required (i-stop) |
EFB (Q85) required on i-stop; non-i-stop uses 55D23 flooded
Recommended Batteries for Mazda CX-5
Bosch S4 E (EFB) — Bosch’s EFB line is S4 E, not S5
Varta Silver Dynamic EFB Q85 (115D23L)
Varta Silver Dynamic EFB Q85 (115D23L) — check price on Amazon
Yuasa YBX7005 (Q85 / D23 EFB)
Frequently Asked Questions
What battery does a Mazda CX-5 need?
The Mazda CX-5 (KF) needs a JIS D23 case EFB battery — a Q85 EFB (~65–70Ah, ~670 CCA) — on i-stop models. Some SKYACTIV-D diesel models take a larger D31/T110-class battery.
Does the Mazda CX-5 need an AGM or EFB battery?
Most UK CX-5 (KF) have i-stop (stop-start), which requires an EFB battery (Q85) — it is not optional. Only non-i-stop models can use a standard flooded battery (55D23).
How long does a Mazda CX-5 battery last?
Typically 4–6 years depending on driving patterns. Short urban journeys and cold winters reduce battery life.
Can I replace the Mazda CX-5 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 →