Just a newbie question:

I found a Tyre Pressure Monitoring (TPM) Switch for an A3 over at VAGPARTS and wondered...

I'm presuming that the loom is prewired for this sort of thing as it's only £45 for the upgrade if you add it to the original spec. To my knowledge the TPM works by monitoring the wheel rotation sensors supplying the ESP system, so no additional sensors are required. My car already has the necessary DIS computer display and I assume that the connector for the TPM switch will be there if you prise off the blanking cover.

So - my question is - is it just a case of plugging in the switch and TPM will work - or will someone need to attack it with VAGCOM?

We need to know these things...