To remove the housing, push it towards the rear glass and then upwards to disengage the housing from rear dash, then slide it towards the left to remove it from the slotted holes the clips align into.

On the underside of the housing, you will see the bulb assembly that holds the bulb. To remove the assembly, rotate counterclockwise.

With the bulb assembly removed, you now can remove the burned out bulb from the socket.

Take your new bulb and reinsert it back into the socket. Take caution as to not handle the bulb with your bare hands as any grease or oils left on the bulb will shorten its life. Note - Using a light coating of bulb grease (dialectic grease) in the socket will help minimize any corrosion build-up. While not necessary for interior bulbs, it is still cheap insurance for the care of your car.

With the new bulb secured into the socket, reinsert the assembly back into the housing this time rotating clockwise to secure in into place.

With the bulb assembly secure into the housing, align the tabs of the housing with the slots in the rear dash (make sure the bulb assembly wire loom is clear and wont be pinched) and firmly push it back into place. You should hear the housing click into place.