I'm new to this forum, so I apologize if this is in the wrong area.

I bought a 2003 G35S Sedan the other day (my first G35!). I'm loving this car, but the front passenger side door won't open from the inside or outside of the car. The lock in the inside will close completely, but won't seem to open all of the way. Also, when I use the key fob to lock the car, the other three doors lock just fine but this door makes a loud buzzing/grinding sound and remains locked.

Does anyone have an idea of what could be wrong? A friend of mine said it's most likely the actuator. I also read in another post on this forum that cold weather can cause this issue. I live in Utah, and it's pretty damn cold this time of year haha.