Car battery Audi A4 B9 (2015–2024)

About this part

The battery starts the engine and powers the electronics when the engine is off. On cars with start-stop it works much harder: it discharges and recharges at every traffic light.

It lasts 4 to 6 years on average. The signs are a slow start in the morning, especially in the cold, lights that dim when starting and a start-stop system that stops cutting in. On diesel engines the cranking current matters more: starting a cold diesel takes a lot of energy in an instant. On petrol engines the battery works less at start-up, but with so much electronics on board capacity is still the figure to look at.

Capacity (Ah), cold cranking current (A), dimensions and terminal layout matter. With start-stop you need the right technology - EFB or AGM - and not a conventional battery, which would last only a few months. On a car that is a few years old, before replacing the battery it is worth checking the alternator: a new battery drained by a tired alternator does not last long.

Our catalogue has 50 items in this category, from €27.28, by BOSCH. Which ones fit your Audi A4 B9 depends on the version: choose it here alongside.

The right part depends on the version: tell us yours below to carry on.