I think the wire harness is closer to $800. It takes a competent mechanic about an hour to install. A rebuilt throttle actuator is around $600, also takes about an hour to install.

lws1: I wouldn't let this wire harness issue scare you to much. If you are not a hands on DIY type, you might consider a pre purchase inspection. A good mechanic who is familiar with these cars will be able to tell very quickly if the wire harness is bad or not. He will also be able tell if the head gasket is leaking. If the throttle actuator has been replaced with a rebuilt unit, He should be able to tell by looking at the connector plug. As I mentioned in a previous post, there is really no way to tell by looking if a throttle actuator has been replaced with a new unit.

I have 200,000 miles on the engine in my 94 wagon, and, now that the common issues have been dealt with, I expect to get another 100,000 relatively trouble free miles.

J. M. van Swaay

By the way, there is a how to article on the engine wire harness replacement with lots of informative pictures. Here's the link. http://www.peachparts.com/Wikka/M104WireHarness