The 12-volt battery in a 2019 Audi A4 is located in the trunk, on the left-hand side, beneath a removable floor panel. It is not in the engine bay.
In the 2019 Audi A4 (B9 generation), the standard 12V battery is housed in the luggage compartment rather than the engine compartment. This placement helps with weight distribution and protection from heat, and access is from the cargo area rather than the engine bay. Depending on exact trim or regional specifications, the battery may sit behind a trim panel next to or above the spare tire well, but the left side of the trunk under the floor panel is the common configuration.
Battery location and how to access it
To locate and reach the battery in a typical 2019 A4, follow these steps:
- Open the trunk and lift the carpeted floor panel on the left side to expose the battery and its mounting bracket.
- Remove the securing bracket or fasteners, then disconnect the negative (-) terminal first, followed by the positive (+) terminal, using insulated tools and taking proper safety precautions.
- Replace the battery with the correct 12V type (as specified in your manual), resecure it, and reconnect the terminals in reverse order. Reinstall the floor panel when finished.
Note: Some regional or trim variations may place the battery slightly differently within the left side of the trunk or behind an additional trim cover. Always refer to the owner’s manual for your exact build to confirm location and replacement procedures.
Additional considerations
If you need to jump-start the car, Audi provides dedicated jump-start points in the engine bay for safety. When in doubt, follow the manual’s instructions and use the proper sequence to avoid electrical damage.
Summary
For a 2019 Audi A4, the 12V battery is typically located in the trunk on the left side under the floor panel, not in the engine bay. Access involves lifting the trunk floor cover, removing the bracket, and safely disconnecting the terminals. Always consult the owner's manual for your exact trim and regional configuration to ensure correct location and procedure.