Volkswagen Golf Battery: Specs, Fitment & Common Faults

A genuine, well-documented VW Group requirement: the Golf's replacement battery needs to be "coded" to the car's Gateway module — plus which of the two batteries eTSI models actually need.

Generation covered: this guide is for the eighth-generation Golf (Mk8, 2019–present), with particular focus on 2019–2023 registered examples now old enough for parts to be a common search. The previous Mk7 (2012–2019) uses different part numbers throughout — check your logbook or VIN if you're unsure which generation you have.

Illustration for editorial purposes

OEM Part Number: AFB096

Accuracy note: Volkswagen uses several genuine factory battery specifications across the Golf Mk8 range depending on engine and equipment level — always confirm the exact type printed on your existing battery's label, or check against your VIN, before ordering.

Case size / type	H6 / Type 096 (also referenced as AFB096) — the most common size for Start/Stop Golf Mk8 models
Confirmed fitment, 2.0 TDI GTD	70Ah, 760A (EN), EFB technology
Smaller petrol variants	Often H5 / Type 027, typically 59-60Ah, EFB — confirm before ordering as this differs from the H6/096 fitted to larger-engined cars
Higher-spec Start/Stop cars	AGM technology (rather than EFB) is used on some trims — check your existing battery's label for "AGM" or "EFB" before buying a direct replacement

Confirmed: Most Golfs Genuinely Need the Battery "Coded" After Replacement — Volkswagen Golf Battery

This is worth understanding before assuming a simple swap is the end of the job: VW Group vehicles with a Battery Management System (essentially any Golf with stop-start, which is the large majority) need the new battery's details — capacity, chemistry, and serial number — registered to the car's Gateway module, a process usually called battery coding or registration. Skip this, and the car's charging strategy keeps assuming the old, worn battery is still fitted, which can lead to overcharging or undercharging the new one and shortening its life prematurely. This can genuinely be done with widely available aftermarket tools like VCDS or OBDeleven, not exclusively at a VW dealer with their ODIS system — worth knowing if you're comparing quotes or considering doing it yourself.

A genuinely useful, specific detail: the coding process reads a Part Number, Vendor Code, and Serial Number printed on the battery's own label — budget or generic aftermarket batteries sometimes lack a valid one of these, which can cause the coding process to fail outright. If a battery's exact new part number is rejected during coding, using the original (pre-supersession) part number instead sometimes resolves it. Genuinely worth choosing a battery from a reputable supplier with proper VAG-compatible labelling rather than the cheapest generic option specifically for this reason.

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.

Two Batteries on eTSI Models — Know Which One You Need

Important: eTSI (mild hybrid) versions of the Mk8 Golf have both a standard 12V AGM battery and a separate 48V lithium-ion battery mounted under the passenger seat. These are entirely different components with very different costs — confirm which one you actually need before ordering anything.

12V AGM battery (all versions)	Standard 12V type — confirm size/rating against your existing battery or VIN
48V mild hybrid battery (eTSI only)	Not a standard retail part — typically £850–£1,300 fitted at a VW dealer, including the belt-driven starter-generator if that also needs replacing

On eTSI models specifically, a weak 12V AGM battery can cause cascading errors throughout the 48V mild hybrid system, triggering warning lights that look like a bigger problem than they are. It's worth having the 12V battery tested first — above 12.4V with the engine off is considered healthy — before assuming a fault lies with the more expensive 48V system.

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 Volkswagen Battery

The same part, covered across other Volkswagen models.

Volkswagen Golf Battery: Specs, Fitment & Common Faults

OEM Part Number: AFB096

Confirmed: Most Golfs Genuinely Need the Battery "Coded" After Replacement — Volkswagen Golf Battery

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