Quote Originally Posted by shack View Post
I bought an aluminium (eBay) one for my 300tdi defender, it's been fine, quality seems good and it's been a few years now.

The cap failed but was easily replaced as it was an off the shelf job.

I'd get the eBay one myself, but if it failed I'd just wear it and try another!
Given the "accuracy" of the standard D2 temp gauge I'm not sure I agree...