Bimmerfest - BMW Forums - View Single Post - Next person to replace coolant temperature sensor: Please measure the O-ring size!
View Single Post
Old 08-05-2010, 08:49 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by pleiades View Post
FAE brand from Pelican comes with an O-ring
I measured a new FAE temperature sensor o-ring at approximately (it's rubber) 0.330" ID (8.382mm) and 0.115" thick (2.921mm).

That means the best-fit is indeed most likely BMW PN 13 62 1 743 299 (which is for the air temperature sensor in the intake manifold) which is known to be 8mm ID x 3mm Thickness.

It's so hard to find this information (I don't think it was ever published on the E39 forums; because I found it only on the E46 forums), that I am glad we finally got this resolved.

Attached Thumbnails
Click image for larger version

Name:	temperature_sensor_o-ring.jpg
Views:	43056
Size:	98.4 KB
ID:	241031  
Reply With Quote