Audi Coolant Capacity Chart by Model: Antifreeze Specifications & Volumes
Nothing ruins a perfect drive like an overheating engine, and in a precision machine like an Audi, the coolant you choose matters just as much as the oil.
TL;DR: Most modern Audis require G13 or G12evo coolant that meets VW TL 774 specifications. Cooling system capacities vary widely by model—a 2.0L A4 holds about 10.5 quarts, while a 3.2L V6 might need 11.5 liters. Always check your specific engine code, and never mix incompatible coolant types.
Your Audi’s cooling system is a marvel of German engineering. It’s not just about keeping the engine from overheating—the right coolant also protects aluminum components from corrosion, lubricates the water pump, and prevents scale buildup in tiny passages. Get it wrong, and you’re looking at expensive repairs.
“Audi is one of the few manufacturers whose coolant does not require changing for the life of the vehicle,” but that doesn’t mean you should ignore it entirely.
Understanding Audi Coolant Specifications
Audi has developed several generations of coolant over the years, each with specific applications and compatibility rules.
The Evolution of Audi Coolants
| Coolant Type | Color | Introduction Year | Compatibility Notes |
|---|---|---|---|
| G11 | Green-blue | 1994 | Discontinued; do not mix with newer coolants |
| G12 | Red | 1996 | Discontinued; can be mixed with some G12+ variants |
| G12+ | Purple | 2000 | Compatible with G12++ and G13 |
| G12++ | Purple | 2005 | Fully compatible with G13; factory fill from MY2005 onward |
| G13 | Purple | 2008 | Standard for most modern Audis; fully compatible with G12++ |
| G12evo | Purple | 2019 | Newest specification for MY19+ models; required for Audi e-tron |
Color Coding and Identification
Always check the coolant color in your expansion tank. The purple/pink family (G12+, G12++, G13, G12evo) is mostly compatible within the group, but never mix with blue/green G11 coolant without a full system flush.
Here’s the catch: on some models like the 6.3L W12 engine, only G13 coolant is allowed—no mixing whatsoever. Always consult your owner’s manual.
Audi Coolant Capacity Chart by Model
Coolant capacity varies significantly based on engine size and configuration. Here are some reference points:
A4 / A5 Models
| Model | Engine | Capacity | Specified Coolant |
|---|---|---|---|
| B8 A4 (2009-2016) | 2.0L TFSI | Varies | G12++ / G13 |
| B8 A5 (2008-2016) | 2.0L TFSI | 9.5L | G13 |
| B8 A5 (2008-2016) | 3.2L V6 | 11.5L | G12+ |
| First-gen A5 (2.0L TDI) | 2.0L CAHA/CAHB | 7.5L | G12+ |
| First-gen A5 (2.7L TDI) | 2.7L CAMA/CAMB | 11.5L | G12+ |
| B9 A4 (2017+) | 2.0L TFSI | ~10.5L (quoted) | G13 |
A6 Models
| Model | Engine | Capacity | Specified Coolant |
|---|---|---|---|
| C8 A6 (2019+) | 2.0L TFSI | 10.0L (10.5 qt) | G13 (TL-VW774J) |
| C8 A6 Quattro (2019+) | 3.0L TFSI | 10.0L (10.5 qt) | G13 (TL-VW774J) |
Q5 Models
| Model | Engine | Capacity | Specified Coolant |
|---|---|---|---|
| Q5 B8 (2009-2017) | 2.0L TFSI | ~8-10L (rough estimate) | G12++ / G13 (VW TL 774) |
| Q5 B8 (2009-2017) | 3.2L V6 | Varies | G12++ / G13 |
Classic Models (For Reference)
| Model | Year | Capacity | Notes |
|---|---|---|---|
| V8 Quattro | 1992 | 8.5L | Older system, different spec |
| 100 | 1992 | 12.0L | Older system, different spec |
| Coupe Quattro | 1991-90 | 8.0L | Older system, different spec |
| 5000 Turbo Quattro | 1988-85 | 8.0L | Older system, different spec |
Step-by-Step: How to Check and Top Up Your Audi Coolant
- Wait for the engine to cool completely—never open the expansion tank cap when the engine is hot. The system is pressurized, and hot coolant can cause serious burns.
- Locate the expansion tank—it’s a translucent container under the hood with MIN and MAX marks on the side.
- Check the level—it should be between the MIN and MAX lines when cold.
- If topping up, use the right fluid:
- Match the coolant type already in the system (check color and spec)
- Use a 50/50 mix of concentrated coolant and distilled/demineralized water
- Never use plain tap water—it can cause scale buildup
- Don’t overfill—the system needs room for expansion as the engine warms up.
If you’re constantly topping up, there’s likely a leak somewhere. Have the system pressure-tested by a professional.
FAQ: Audi Coolant Questions
What coolant does Audi recommend?
For most modern Audi models, the factory spec is G13 (or G12evo on MY19+ cars). These meet the VW TL 774 standard. Always check your owner’s manual or the label on your expansion tank.
Can I mix different Audi coolants?
G12++ and G13 are fully compatible and can be mixed in any ratio. However, mixing older G11 (green-blue) with any G12/G13 family coolant is not recommended and requires a full system flush.
How much coolant does an Audi A4 need?
A 2017+ A4 2.0L TFSI takes approximately 10.5 liters (10.5 quarts) of G13 coolant. Earlier models may vary based on engine code.
Is G13 coolant still used?
Yes, G13 is the current standard for most Audi models, though newer models (2019+) may use G12evo instead. The 2015 A3 2.0 TDI with engine code CRUA is one known exception that must still use G13.
Do I need to change my Audi coolant?
Audi considers most modern coolants “lifetime” fluids—they don’t require scheduled replacement. However, many independent specialists recommend changing it every 3-4 years or 100,000 km as a preventative measure.
What’s the difference between G12++ and G13?
G13 is the newer specification introduced in 2008. It uses glycerine-based technology that’s more environmentally friendly than G12++’s ethylene glycol base. For practical purposes, they’re fully compatible and can be mixed.
References
Trusted Resources for Audi Coolant Information
- Audi USA Official Website
- NHTSA – Audi Technical Service Bulletin on Coolant Identification
- Garage Wiki – Vehicle Fluid Specifications
Which Audi do you drive, and when was the last time you checked your coolant? Drop a comment below and let us know!
