I just programmed a new Keyfob for my I30.
The lock/unlock, trunk lock/unlock works fine. But I am not able to unlock the passenger door. How do I do it?
When I press unlock, the driver side gets unlocked. But not the passenger side.

The passenger door unlocks when I use the key to unlock the driver side door. I just turn it clockwise twice.

 

This is going to sound very basic, but did you try pressing the unlock button multiple times? On my I30, one press unlocks just the driver door, while a second press unlocks the remaining ones. Same way on my Q50.

 

^^^^ what he said.

Either press the unlock button two times or press and hold for a few seconds. If you keep holding the unlock button depressed even longer, the windows will roll down on the 96 to 99 models. The windows won't roll down on the 2000 and 01 models.

 

Yup, I did. I also tried keeping the unlock button pressed.

I just tried new batteries and it worked! I wasn't expecting this to be simple.
All the keys work as expected now.