AlexNk

Thank you for the reply! It is actually the original tank since I bought the car brand new in 2018. There is no tag "Mit Silicat". Now my Skoda is in 70 000km so was checking to pump out all the G13 from system (had done it when car was 4 year and 35000km). And in the search I found out that G12evo is replacing G13 but to replace the expansion tank in case is silica double-walled type. It does not have any silica bag inside, that I have been inspecting carefully. AI engines says that 6Q0 121 407 / A / B was already used on earlier Fabias, long before the later 5Q0... silicate-reservoir issue, Since there is no problem with the tank I was thinking to keep it if is silica and replace later on a damage or leak.

Hi, I have just unplugged to check if my Skoda Fabia 2018 1.0 TSI expansion tanks contain silica so as to replace it with silica free and completely change the anticoolant from G13 to G12evo. The OEM number is 6Q0121407B. Attached are the photos. I have asked three AI engines but all say is silica free. I just wanted a second opinion so as to proceed with only anti-coolant change to G12evo. PS. the level of coolant is low because I sucked out a bit in order to be easier to unplug to check the OEM.