Update: Received the sender from rkeywood (thanks Robert!) and put it in. It was teh same part as the one I took out. Works as expected. Reading is about the same as the original sender. We'll have to see if the intermittent problem goes away. To confuse things, I topped up the oil. On the dipstick, oil level was in the hash area, about 1/4 from the bottom of the hash. That seemed like enough to me so didn't worry about it. However, to be complete, I added oil to get it to the top of the hash section. For the record, the build sheet lists the sender part as: 360081029039 oil pressure sender-0-5BAR (VDO). The sender is marked 29/39, which corresponds to the last 4/5 digits in the part number. The threads are not pipe threads. Thanks for all the help, David