I think there is a fault with the coolant sensor and therefore need to replace it (temperature warning light comes on in the morning even though there is adequate coolant). As I understand it, it is integrated into the coolant expansion tank and it is easier to replace the tank and sensor in one go. My questions are:

1. The code I have been given is 6q0121407a. Is this correct and does this code include the sensor?

2. Do any other VAG cars use this part? (The only dealer I have got within reasonable distance is a SEAT dealer)

Cheers

Don't know part number, but when I asked for the corresponding part for an Ibiza (1J0121403B IIRC), it turned out to be the wrong bit. You can't replace the sensor independent of the tank, so I've just shorted the sensor with a bit of wire as an (increasingly permanent) temporary fix!

I think there is a fault with the coolant sensor and therefore need to replace it (temperature warning light comes on in the morning even though there is adequate coolant). As I understand it, it is integrated into the coolant expansion tank and it is easier to replace the tank and sensor in one go. My questions are:

1. The code I have been given is 6q0121407a. Is this correct and does this code include the sensor?

Yes.

Yes.

2. Do any other VAG cars use this part? (The only dealer I have got within reasonable distance is a SEAT dealer)

Cheers

VW Polo

Mine has been coming on recemtly due to the cold weather. Suspect the sensor cannot cope with the temp because as soon as it is +0 then it is OK. Maybe save your brass and see how it goes.