Audi A1 Battery: Specs, Fitment & Common Faults

A genuinely important, confirmed finding: 48V mild hybrid alternator failure has a 7-year US extended warranty, but UK owners have struggled to get equivalent support from Audi UK for the same fault.

Illustration for editorial purposes

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OEM Part Number: 000915105

Genuinely useful to know: Audi's current genuine battery part numbers follow a consistent pattern — 000915105 followed by a two-letter suffix that encodes the exact capacity and technology (e.g. "DD" = 60Ah conventional, "EB" = 59Ah EFB, "CB" = 58Ah AGM). Checking the suffix on your existing battery's label against Audi's own reference table is a reliable way to confirm the exact replacement needed.

Standard Start/Stop fitment (EFB)	Type 027 (L2), 60Ah, 640A (EN)
AGM fitment, higher-demand variants	Type L3 (096), 70Ah, 760A (EN)
Genuine part number format	000915105 + two-letter suffix (e.g. 000915105DD) — confirm the exact suffix via your existing battery's label or VIN

Audi A1 Battery: The Part Everyone Blames First, Not Always Correctly

When a Audi A1 won't start, the battery is the first suspect more often than anything else, and it's right often enough that checking it first is a reasonable move. It isn't always the actual cause though, which is worth knowing before paying for a replacement that solves nothing.

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.

Audi A1 Battery: What It Does

Starting the engine and running electrical systems whenever the engine isn't turning — that's the Audi A1's 12V battery job. If it has stop-start, it works much harder than older designs, since the engine cuts out and restarts constantly, which is exactly why it needs a specific AGM or EFB battery rather than a standard one.

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A Genuinely Important, Confirmed Finding Worth Knowing — Audi A1 Battery

If you own a model fitted with the 48V mild hybrid system, this is genuinely worth knowing: alternator failure specifically related to this system has been confirmed in the US with an extended warranty of seven years covering this exact issue. UK owners have documented finding it genuinely difficult to get equivalent information or support directly from Audi UK for the same fault — worth persisting and specifically referencing the US extended warranty coverage when raising this issue with a UK dealer.

A genuinely useful diagnostic reading worth knowing: a healthy trickle charge to the alarm system typically measures around 0.03 amps at rest, so anything notably higher than this when tested with a multimeter points toward a genuine parasitic drain worth investigating further.

It's also genuinely worth knowing a practical concern worth addressing before replacing the battery yourself: disconnecting the old battery can result in various computer settings being lost, worth using a proper memory-saving device during the swap to avoid having to reconfigure these afterward.

Audi A1 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 Audi Battery

The same part, covered across other Audi models.