Hi All - I thought I posted this already, however, my stats say that I have never posted, so here is my question again. I apologize if this turns out to be a duplicate post.
I was wondering if anyone could identify this component on my SmartKey (circled in yellow). When I opened the SmartKey to replace the battery, this component fell out, and it no longer works. It seems to be a 6 pin component with the markings "400x". Pins 2 + 5 seems to be tied to ground.
This is from a 2007 TCH with factory remote start (271451-0140)

Many thanks for any help

Cheers
Colin