The 2018 Audi Q5 should use a VW/Audi-approved long-life coolant, typically the G13 pink formulation (or an equivalent that meets VW/Audi specifications). Do not mix different coolant families, and verify the exact spec in the owner's manual or on the coolant reservoir. This article explains the options and how to replace coolant correctly.
Understanding VW/Audi coolant families
Volkswagen and Audi use a family of coolants with different chemistries and service life. The main categories you’ll encounter are G11, G12 (and G12+), and G13. While all are designed for aluminum engines and modern cooling systems, they are not interchangeable without risk.
- G11 – Green, inorganic coolant with silicates; generally not suitable for aluminum engines and not long-life.
- G12 – Pink/red, organic acid technology (OAT); longer life than G11 but not compatible with G11.
- G12+ – Enhanced pink OAT variant with extended life and improved corrosion protection; typically compatible with the G12 family.
- G13 – Pink/purple, long-life, phosphate-free OAT coolant designed for aluminum engines and modern VW/Audi vehicles; widely used on newer models.
Note: Do not mix coolant types. If you are unsure about your current coolant, check the expansion tank label for the exact specification or consult your dealer. The 2018 Audi Q5 aligns with the G13 family, but always verify with your vehicle’s documentation.
Recommended coolant for the 2018 Audi Q5
In practical terms, your 2018 Q5 should be filled with a coolant that meets VW/Audi specification TL 774-C for G13 or an equivalent that Audi approves for use in aluminum engines. When shopping, look for labels that say “VW TL 774-C” or “G13” and avoid mixing with older G11 or G12 formulations.
To keep things simple, many owners use a premixed 50/50 coolant that is labeled as G13-compatible; using premixed reduces the risk of wrong dilution and simplifies the fill process.
Replacing or topping up coolant in a 2018 Audi Q5
The following general steps apply to replacing or topping up coolant in modern Audi Q5s. If you are unsure, consult a qualified technician, particularly for bleeding and air-pocket removal.
- Park on a level surface and ensure the engine is cool before opening the radiator cap or expansion tank to avoid scalding from hot coolant.
- Locate the correct coolant specification on the expansion tank or owner’s manual; confirm it is G13 or a VW TL 774-C approved coolant.
- Prepare the coolant by using a 50/50 premixed solution or the manufacturer’s recommended concentrate with distilled water, as directed on the bottle.
- Drain the old coolant from the cooling system per the service manual; typically this involves opening the drain valve on the radiator or removing a lower hose and collecting the coolant in a container for proper disposal.
- Refill the system with the new coolant, ensuring that it covers the radiator, heater cores, and engine blocks as designed by the vehicle; then bleed the system to remove air pockets, following the official bleeding procedure for the Q5 (often including running the engine with the heater on and monitoring temperature).
- Start the engine and bring to operating temperature, check for leaks, and ensure the temperature gauge sits in its normal range; replace the reservoir cap if necessary and top off to the correct level.
Used coolant should be disposed of at an appropriate facility; never pour it down the drain, and wear gloves when handling hot or concentrated fluids.
Safety and disposal considerations
Always handle coolant with care, as it is toxic. Use appropriate containers for disposal and follow local regulations. If you notice overheating, persistent leaks, or a sweet smell from coolant, seek professional service promptly.
Summary
For a 2018 Audi Q5, the recommended coolant is a VW/Audi-approved long-life coolant in the G13 family (pink), or an equivalent meeting VW TL 774-C specification. Do not mix coolant types, and verify the exact specification on the expansion tank or owner’s manual. If in doubt, have a certified technician perform the replacement to ensure proper bleeding and fill.