Leak from Temp Sensor?

[McTyke]

Tracked down the small leak to this bad boy. Looks like an electrical plug on top of a sensor that screws or plugs in to top of thermostat housing. Access looks really tight due to whatever that is above it. Anyone removed and replaced before? Any tips? Any idea of replacement part (which assume will include leaking washer or o ring) Can't seem to find it on the real oem site.
Cheers

 

[patriot66]

I replaced mine a few a few years back. It's a small green o-ring that fails and causes the leak. Just buy the sensor complete with o-ring, link below. Access is tight but just persevere and you can get the old one out and new one in. You may loose a little coolant but just top it up and bleed if necessary
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F173716167735

 

[McTyke]

Many thanks

 

[oldgit]

Did mine a few weeks ago.
Move the fan and shroud out of the way to give yourself more room to work.

I have a box of assorted O-rings so I just replaced the O-ring.

 

[tomrdy]

Yup done this one quite early on in Z ownership.

Piece of cake to hot swap it in place (i dont mean hot coolant of course ). Just top up after you'll be fine!