According to my Cousin. The eclipse's also have a egr vavle solenoid like mentioned in the link posted. BUT is it Normally open, instead of normally closed like the boost solenoid. So that is the one that really should be gotten. Because you would have a normally operated 4wd until you flip the switch. that way the long period of running 4wd won't be an issue. flip the switch and lose the front diff. I plan on using that one, and put a lighted toggle switch in. so I won't forget to turn off.