The battery is in the trunk on the right side.
In the 2014 Audi S4 (B8 generation), the standard 12-volt battery is mounted in the luggage compartment rather than in the engine bay. It sits under a removable plastic cover along the right-hand side of the trunk and is secured with a hold-down clamp. Access typically requires lifting the trunk floor panel to reach the battery area.
Location in the trunk
The common configuration for the 2014 S4 places the 12V battery in the trunk, on the right-hand side as you face the rear of the car. This layout keeps the battery out of the engine bay and helps with weight distribution and space utilization.
Accessing the battery
To locate and access the battery, follow these steps:
- Park on a level surface and engage the parking brake. Ensure the ignition is off and keys are removed.
- Open the trunk and lift the floor panel to reveal the carpeted area and any side covers.
- Remove the plastic battery cover or panel on the right-hand side until the battery is exposed.
- Loosen the hold-down clamp, then disconnect the negative (-) terminal first, followed by the positive (+) terminal.
- If replacing the battery, note the correct size and venting requirements to ensure a proper fit in the tray.
After you finish maintenance, re-secure the terminals, reattach the battery cover, replace the trunk floor panel, and close the trunk.
Safety and maintenance notes
When working with the vehicle’s electrical system, observe standard safety practices and consult the owner’s manual for model-specific guidance. If in doubt, seek professional assistance to prevent injury or damage to the vehicle’s electronics.
Summary
The 2014 Audi S4 stores its 12V battery in the trunk on the right side, under a removable cover and held down by a clamp. Accessing it requires lifting the trunk floor panel and removing the side cover, with proper sequence for disconnecting and reconnecting the terminals. Always follow safety guidelines and refer to the manual for precise instructions for your vehicle configuration.