Citroen C4 Battery: Specs, Fitment & Common Faults

On the C4, a genuine, distinct root cause of repeated battery drain is worth checking — a faulty fuse box, not the battery itself.

Generation covered: this guide is for the current C4 (launched 2021, facelifted 2024), with particular focus on 2021–2023 registered examples now old enough for parts to be a common search. Check your logbook or VIN if you're unsure which generation you have.

Illustration for editorial purposes

A Genuine, Real Owner Complaint Worth Knowing About

If your stop-start has stopped working reliably despite a relatively new battery, this is worth knowing directly: one documented owner's blunt assessment, after extensive troubleshooting with their dealer, was that the AGM battery fitted to these cars is "not fit for purpose" — needing a full charge on a proper smart AGM charger roughly every two to three weeks just to keep stop-start functioning during a pattern of shorter, everyday trips, despite the battery otherwise starting the car normally. If you're finding yourself charging the battery repeatedly just to restore stop-start rather than experiencing a genuine one-off fault, you're likely not alone, and it's worth raising this directly with Citroen rather than assuming your specific battery is simply defective.

A genuine, distinct root cause worth checking if the battery keeps draining overnight: a faulty fuse box has been documented as the actual cause of repeated flat batteries on more than one occasion, with lights, wipers, and the fan randomly activating and draining the battery even with the car locked and untouched. A replacement fuse box, sourced independently for under £100, resolved this completely in documented cases — worth considering if you've already replaced the battery more than once without a lasting fix.

A genuinely useful benchmark worth knowing: a healthy car at rest should draw well under 50 milliamps from the battery. If a multimeter test shows anywhere close to double or triple that figure, that's a genuine parasitic drain worth chasing down circuit by circuit rather than simply replacing the battery again.

The Part Everyone Blames First, Not Always Correctly

A car that won't start gets blamed on the battery more often than any other component, and it's right often enough to make that assumption a reasonable first check. But it's not always the actual cause, which is worth knowing before spending money on a replacement that doesn't fix anything.

Before you buy: battery size, capacity and type (standard vs AGM/EFB for stop-start systems) vary by trim and engine. Always confirm against your VIN before ordering.

OEM Part Numbers

Accuracy note: C4 has genuinely used Type 027, 063, and 096 across its range, in lead-acid, EFB, and AGM technology depending on year and Start/Stop equipment. Always check your existing battery's label before ordering.

Type 027 fitment	242mm length, 175mm width, 190mm height — 52-70Ah depending on technology
Type 096 fitment (Start/Stop, AGM)	278mm length, 175mm width, 190mm height — 70Ah, 760A (EN)
Important	Never fit a standard lead-acid battery in place of EFB or AGM on a Start/Stop car — this will cause premature failure and can trigger warning lights.

Battery specification varies between petrol, mild-hybrid, and fully electric ë-C4 versions — the ë-C4 uses a small 12V auxiliary battery to power electronics separately from its main drive battery, and fitting the wrong type or capacity can cause electrical faults. Mild-hybrid versions also carry a battery management system that some specialists recommend having a new battery registered to, rather than assuming a straightforward swap is sufficient.

What It Does

The 12V battery provides the power needed to start the engine and runs electrical systems when the engine isn't turning. On cars with stop-start technology, the battery works much harder than on older designs, since the engine switches off and restarts far more frequently — which is exactly why these cars need a specific AGM or EFB battery type rather than a standard unit.

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 Citroen Battery

The same part, covered across other Citroen models.

Citroen C4 Battery: Specs, Fitment & Common Faults

A Genuine, Real Owner Complaint Worth Knowing About

OEM Part Numbers

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