Originally Posted by mgrgpg
Does anyone know what the thread size is for the OEM temp sender?...I am replacing my temp gauge with a VDO and need a bushing to make the VDO sender fit.
Good question. I was in the process of doing this myself. A friend of mine had already installed a VDO sender in his 95 D90 and he told me he had to use a sender that measured 1/8-27 NPT, which is VDO P/N #323 095 for my VDO temp gauge. However, when I went to install it I didn't have the correct bushing so it was a no go. I hadn't thought to measure the OEM sender first just to make sure that I had the correct thread count, but when I did measure it out to be M16x1.5, which is VDO part number #323-416.
So I beleive you can either purchase the M16x1.5 or the 1/8-27 NPT WITH a bushing kit. I had niether the bushing kit nor the M16x1.5. I went with the M16x1.5 and should be installing it later next week. I'll let you know how it turns out.