Yes — in most current Audi A4 models, the 12‑volt auxiliary battery sits in the trunk rather than in the engine bay. Some older generations or specific configurations may place it in the engine compartment or a side panel, so the exact location can vary by year and market.
Where it’s found by generation
The following gives a general guide to common placements across Audi A4 generations. For your exact car, consult the owner’s manual or a dealer, as configurations can vary by market and trim.
- Most recent A4s (B9 generation, roughly 2016–present): 12V battery located in the luggage compartment, typically under the floor panel on the right side.
- Earlier A4s (pre-2016, often referred to as the B8 generation): 12V battery more commonly found in the engine bay or tucked away behind a side panel in the trunk area, depending on market and equipment.
If you’re unsure which generation your car is and want to confirm quickly, start with the trunk floor and, if nothing is found there, expand your search to the engine bay. When in doubt, the owner’s manual or a dealership can provide the exact location for your VIN.
How to locate it in your car
Use these steps to locate the 12V battery without risking damage to components or airbags.
- Open the trunk and lift the floor panel or carpeting to look for a concealed battery box, usually toward the right side near the spare tire area.
- Check the side cargo panel or access cover inside the trunk that may house the battery or its terminals.
- If you don’t find anything in the trunk, inspect the engine bay for a battery on the passenger side or near the firewall, as some configurations place it there.
Locating the battery may require removing a small plastic cover or panel. Always handle with care and disconnect the negative terminal first if you plan any work on the battery.
Safety and maintenance tips
Before performing any work on the battery or electrical system, follow these precautions to stay safe and protect the vehicle’s electronics.
- Wear eye protection and gloves; ensure the ignition and all electrical systems are off before touching the battery.
- Disconnect the negative (-) terminal first, then the positive (+) terminal if you’re removing the battery.
- Store a removed battery in an upright position in a well-ventilated area and recycle it at an appropriate facility in accordance with local regulations.
If you’re replacing the battery yourself, consider having a professional check the charging system and fuse box, since some models use advanced electrical modules that rely on a stable 12V supply.
Summary
For most newer Audi A4 models, the 12V battery is located in the trunk under the floor panel, with variations depending on year, market, and trim. If you cannot find it in the trunk, consult the owner’s manual or contact a dealership to confirm the exact location for your vehicle. Regular inspection and proper disposal of old batteries are important for safety and performance.
How do I tell if my Audi battery is low?
What Are The Signs Your Audi Car Battery Is Dying?
- Vehicle cranks for longer than usual on startup.
- Dimmed interior/exterior lights.
- Needing regular jump-starts.
- Illuminated battery replacement warning lights/notifications.
- Unusual electrical issues.
How to unlock the trunk of an Audi A4 with a dead battery?
So for the Audi A6 it's right here going to just push it down lift up the trunk. And there you have it now I have access to my trunk. And I could reinstall my new battery. And get my car.
Where is the Audi A4 battery located?
That. And remove next carefully lift the spare wheel grab it from the center. Pull him up and out of the car. So you'll see we have this plastic.
Is the Audi battery in the trunk?
So what we do lift this up. This little store storage bin. And then under here. And by the way this is where the jack is if you wanted to know that. Come on my hands are like Oh here we go.