so my temp gauge started to play up go’s up drops back to zero then all over the place. was going to change the sensor following the top diy on here.
anyway i was digging through the owners manual and found a letter from audi stuffed in the back.
warrenty extension for coolant temp sensor a4 3.0 2002-2005 under 10 years old and less than 160,000k
audi will replace free of charge parts and labour.
the letter was from audi canada so not sure how this affects you US guys.
if any one is having issues with theres i will be happy to scan the letter and email it to anyone who needs it.