I was lead to believe a second hand one will work but the immobiliser light will stay on on the dash after driving a few miles.

I got one from ecu testing which didn't work. Got another from bba which was ok - unusual for them.

Not a bad job though. After having to fit and then refit due to faulty units supplied i could do one in under an hour easy.

Reman units are just so hit and miss irrespective of what part.

Matt