After replacing the door lock actuator on the drivers door the car now can't tell when the door is open. It always assumes the door is closed and I can even arm the alarm while it's open. I checked the connection and everything is in place so the sensor must be bad. I've looked online but can't find the part # for our gen. If someone knows the # or can post a link to it, that would be a life saver!

 

The actuator is not what senses the door is open or not. there's a 2 pin plug that is on the lock mechanism that needs to be connected.

 

I know, that's why I'm asking if anyone knows where to get just the sensor. I called Lexus and they said for our cars I had to buy the whole lock assembly. I'd like to avoid that if possible.

 

have you tried manually locking the door and trying to set the alarm? if that works its still the actuator and not the door ajar sensor. also try a junkyard

 

I just replaced my entire door panel with one from eBay for about $150 (it was cracking on top due to the sun). I switched out the master lock / door handle and had everything back together in about an hour. I think you can do a search for "lexus gs400 door master switch" and that should give you what you need.

Btw, I've used eBay lots of times in the past with good results. I replaced my interior sunroof switch and the lock mechanism on my glovebox. I just found one that was from a 2GS and swapped them out.