Powering up your S4
The candle of the executive sedan may be dimming but that doesn't mean that there aren't those who still enjoy driving around in four door luxury. The Audi S$ has many an electronic gadget to make the drive that much more enjoyable but that does mean that the battery is worked hard during its lifetime.
Related: New vs used Audi S4: what are top 3 differences?
After a few years you may find things not working as they should and the easy fix is to replace the battery and get that all important charge back up to spec. This isn't a problem as replacing the battery on an S4 is a relatively simple task that you can tackle in a matter of minutes, and we can show you how.
You will need:
- Replacement battery of correct frame size and amperage
- 10mm Spanner
Let's get started!
1. Open the boot.
2. Lift the boot floor up by the handle and clip it to the underside of the deck lid with the built in clip.
3. Lift out the spare wheel cover.
4. Remove the spare wheel retaining nut and remove the spare. (If equipped)
5. Locate the battery.
6. Using the 10mm spanner loosen off the nuts off the hold down bracket and remove it.
7. Use the 10mm spanner to remove the negative terminal.
8. Use the 10mm spanner again to remove the positive terminal.
9. Remove the battery.
10. Install new battery and replace all the terminals and brackets in reverse order.
You will need to reset the battery management in the onboard computer (tell the car it has a new battery) to ensure proper charge management. Removal of the battery will erase all presets and data in the infotainment and trip computer. If you don't want to lose these use a battery saver while doing the exchange.
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