Ford B-Max Battery: Specs, Fitment & Common Faults

A stop-start system that's stopped working on the B-Max often points to a charging quirk, not a dead battery — here's the fix worth trying first.

Illustration for editorial purposes

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Ford B-Max Battery: OEM Part Number

Accuracy note: requirement depends genuinely on engine and Start/Stop equipment — the 1.0 EcoBoost with Start/Stop needs EFB or AGM technology specifically, while standard 1.4/1.6 Ti petrol engines can use a conventional lead-acid battery.

1.4/1.6 Ti petrol (no Start/Stop)	242-243mm x 175mm x 175mm, 56-62Ah, lead-acid
1.0 EcoBoost with Start/Stop	Type H3/096/100, EFB or AGM technology required — a standard lead-acid battery isn't sufficient for the frequent cycling involved
Important	Check whether your B-Max has Start/Stop (engine automatically stops at idle) before assuming a standard battery is correct.

Before Assuming the Battery Has Failed, Try This

A genuinely common source of confusion across Ford's stop-start range: the system frequently disables itself and displays a warning about charging or cold conditions, and many owners assume this means the battery has failed and needs replacing. In most cases it hasn't — Ford's Battery Management System deliberately disables stop-start when it judges the battery isn't in a strong enough state to reliably restart the engine, which is the system protecting itself rather than malfunctioning. Owner reports consistently show this resolving itself after a full overnight charge on a proper smart charger, without any need to replace a perfectly healthy battery.

A genuine, documented fix worth knowing: many Ford owners report a specific "charging reset procedure" resolving persistent stop-start and low-battery warnings without needing a new battery: with the ignition on (engine off), flash the main beam headlights five times, then press the brake pedal three times, and wait roughly 20 seconds for the battery warning light to flash, confirming the reset. This isn't an official Ford procedure, but it's widely reported across owner forums as genuinely effective — worth trying before assuming your battery needs replacing.

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Ford B-Max 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 Ford Battery

The same part, covered across other Ford models.