Yes. The two wire sensor has one sensor and a ground. The single wire sensor is the same as the 1.9l vanagons.

Dennis,
From my phone.
________________________________
From: Steve Cotsford<mailto:cotsford@AOL.COM>
Sent: ‎4/‎21/‎2013 10:07 AM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Thermostat housing differences, syncro and non

In looking at my project, 1989 2.1 wbx, I have found a VDO temp sensor that fits into the side of the thermostat housing and is retained with a clip.  (per page F-5 in Bentleys, but not for syncro).    My engine came from a syncro and the temp sensor is threaded into the housing instead.

Do the two different sensors work the same?   Can I leave the syncro one in place and carry on?

Thanks,  Steve