Hi all,

Newbie here so please go gently

I've recently purchased an A4 1.8T, my first Audi, and i love it. I've noticed though that the temperature gauge is temperamental in the fact that sometimes it works and other times not at all.

Any suggestions on a solution to this, any help much appreciated

 

likely the ECT (engine coolant temperature) sensor, fairly cheap to replace. Try using the search feature for more info

 

what the guy above me said.

 

I own 2 B5 A4 1.8T's and both have the same problem. I even got a trouble code for it. The check engine light did not come on though. If you have access to an OBD II scanner, it will probably come up with a code having to do with a coolant temp. sensor. Good Luck!

 

Yep, it's about a $20 part. There's a DIY procedure for it either in the DIY section of this forum, or on www.audiworld.com or www.audidiy.com. Easy and cheap enough to do, plus it's a common failure part on the A4. Even if you change it and it doesn't fix the issue (which it probably will), you didn't waste the money - yours is bound to die sooner or later, so a replacement is at the very least a preventative maintenance deal.