The 2008 Audi A4 typically uses a 12-volt lead-acid battery. The exact size depends on the engine and options, but the most common replacement is Group 48 (also known as H6) with about 70–80 Ah and roughly 680–760 CCA. Some larger engines or markets may use Group 90 (H7) batteries, and models with Start-Stop systems often require an AGM battery.
Battery options for the 2008 A4
The following options reflect common configurations you may encounter when replacing the battery on a 2008 A4. Always verify with your vehicle's label or manual.
- Group 48 / H6: approximately 70–80 Ah, 680–760 CCA; typically a flooded lead-acid battery.
- Group 90 / H7: approximately 90 Ah, 800–900 CCA; used on some larger engines or trims.
- AGM option for Start-Stop systems: 12V AGM battery, generally in the 70–90 Ah range; recommended if your car has a factory Start-Stop configuration.
In practice, the exact size you need depends on engine code, transmission, and equipment. Always check the current battery label or your owner's manual to confirm.
Identifying the right battery for your car
To ensure you install the correct battery, follow these steps to verify the exact specification for your A4:
- Look at the battery label or case for the group size (for example, 48/H6 or 90/H7) and the cold-cranking amps (CCA) rating.
- Consult your owner's manual or a dealer/parts diagram to confirm the recommended battery specification for your engine code and trim.
- If your model has Start-Stop technology, expect an AGM (absorbed glass mat) battery rather than a standard flooded lead-acid unit.
- When replacing, ensure the replacement physically fits the tray and has the same terminal layout and polarity; check the battery hold-down and venting requirements.
If you remain unsure, contact an Audi dealer or qualified auto parts retailer with your VIN to confirm the exact battery specification for your vehicle.
Summary
Most 2008 Audi A4s use a 12-volt lead-acid battery, with Group 48/H6 being the most common size; some variants use Group 90/H7, and Start-Stop-equipped cars typically require an AGM battery. Always verify by checking the current battery label, owner’s manual, or VIN-based parts lookup before purchasing.
Does an Audi require a special battery?
Choosing the Correct Audi Car Battery Type Vehicle
Audi cars require specific Absorbent Glass Mat units to power start-stop technology and advanced safety features. Incorrect sizes or low cold cranking amps lead to electrical failures and engine start issues.
What battery does an Audi A4 use?
Most Audi A4 models use an H6 (Group Size 48) or H7 (Group Size 94R) battery, depending on the year and trim.
What type of battery is in an Audi?
12V Lead-Acid Battery
What is a 12V Lead-Acid Battery Used for in a Audi? A 12V lead-acid battery is the most common type used in Audi vehicles to start the engine and power electrical systems.
What battery does a 2008 Audi A4 take?
Diehard Platinum – Enhanced Flooded Battery: H7 Group Size, 800 CCA, 150 Minute Reserve Capacity (Part No. H7-EFB)