KurtAudiQ3

@Magnet yes, waiting to speak to the manager to find out why they put these in the tank. It seems to me like an additive of some sort, but can’t find anything about it online and I’ve spoke to several mechanics, and none have heard or seen of this before. Will let you know what Audi say.

@Steve Q Already checked. No identifiable Audi markings or reference numbers on the canisters. They’ve been removed as we suspected they were the likely cause of the water pump failure. Can’t find anything confirming that these canisters are Audi’s apart from the dealership claiming it’s ‘normal’. Doesn’t sound right to me.

I own a 2015 Q3 with c.40k miles on it. Purchased a year ago from Audi. The car recently overheated. Upon inspection, I found two small canisters IN the coolant tank with small granules in the canisters. One of the canisters had broken open so I assumed that the granules were now in my coolant system. The mechanic had to replace the water pump and thermostat due to both a leak and clogging by the granules. Our assumption was that the canisters/granules were a cheap fix for an existing leak, prior to my purchase. I spoke to my Audi dealership and they told me that the canisters are normal and that Audi put them in ALL their coolant tanks! No one I have spoken to and none of my research has found anything about these canisters. Does anyone here know anything about these mysterious canisters that I found in my coolant tank and if Audi do actually put them in, and why?!