Recently the remote stopped working, then I started to use key to lock my car. But I found it can only lock the driver side door, not the one on passenger's side. Which part should I work on?

 

there is no key lock on the p/s door, therefore you cant use the key to lock it. You have to either do it manually, use the switch or use the remote.

 

The remote, obviously. If it's too much of a hassel to manually unlock your driver side door and then hit the power unlock button, then get your remote fixed. You probably just need a new battery or need it reprogramed. Take it to a dealer or find a part or specialty store who can help you. If you just want to order another one, any part store usually can order one in for you. 4 or 5 buttons, and more than likely will be cheaper than ordering it from a dealer.

 

Oh, I thought I could lock both side once rotate the key in the keyhole...seems I have to manually lock it

 

thanks for the advice. Will fix the remote! I doubt the battery run out also.

 

Check E-bay there are always alot of them listed for sale. Programming is easy you can do it yourself. Instructions are in your owners manual.