Hi all have been having an issue with the running temp of my gti (cooling down on motorways) I'm assuming it's the thermostat or coolant sensor so I'm changing them both tomorrow just wondering if anybody on here has had the pleasure of changing these and is there any issues involved, I've had a good few years experience working in garages so I'm fully capable of the task at hand but still it doesn't hurt to ask if there's anything to look out for that may cause grief.