Ford Ka+ Battery: Specs, Fitment & Common Faults

If your Ka+'s stop-start has stopped working, the same charging reset reported across Ford's range is worth trying before replacing a healthy battery.

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OEM Part Number: BS51-10655-AB

Accuracy note: genuine Ford part number confirmed directly from a labelled original battery — Ka+ has used both EFB and standard lead-acid depending on Start/Stop equipment, so check your existing battery's label before ordering.

Genuine reference, confirmed (500A, 60Ah)	Ford OEM: BS51-10655-AB (also referenced as 1941258)
1.2 Ti-VCT/1.5 TDCi, Start/Stop	EFB technology required — a standard lead-acid battery isn't sufficient for the frequent cycling involved
Case dimensions	207-242mm length, 175mm width, 175-190mm height

A Stop-Start Warning on the Ka+ Doesn't Automatically Mean a New Battery Is Needed

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.

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Ford Ka+ 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.