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Your 2011 Audi Q5 will require a coolant known as "Violet" (purple), although it's important to note that the color itself is not crucial. The main reason for the distinction is to prevent confusion and to ensure that pets or animals do not ingest the toxic antifreeze, which has a sweet taste. Instead of focusing on the color, what really matters is whether the coolant is a HOAT type, meaning Hybrid Organic Acid Technology. To simplify, as long as you use a coolant with this specification, like the PEAK Original Equipment Technology European Vehicles Violet Antifreeze and Coolant, part # PEVB53, priced at around $20 per gallon, you can purchase it from AutoZone. This premixed solution at a 50/50 ratio is safe to use in your Q5 without risking damage to your radiator or other issues to worry about.
The 2011 Audi Q5 requires coolant that is approved by Audi/VW, specifically the G13 or G12 coolant.
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