I assume you mean the electrical part of the ignition switch assembly. You should check with your dealer for he most up to date part number in case the part itself has been updated. You should also inspect the electrical connector at the switch for signs of overheating and melting. A replacement can be bought from the dealer, if needed. As for ease of installation, that depends on how good you are with tools. For me, it's a snap. The directions are below.
NOTE:The steering column on vehicles equipped with an automatic transmission is not equipped with an internal locking shaft with the ignition cylinder. Alternative methods of locking the steering wheel for service will have to be used.
WARNING:The airbag system is a sensitive, complex electro-mechanical unit. Before attempting to diagnose, remove or install the airbag system components you must first disconnect and isolate the battery negative (ground) cable. Then wait two minutes for the system capacitor to discharge. Failure to do so could result in accidental deployment of the airbag and possible personal injury. The fasteners, screws, and bolts, originally used for the airbag components, have special coatings and are specifically designed for the airbag system. They must never be replaced with any substitutes. Anytime a new fastener is needed, replace with the correct fasteners provided in the service package or fasteners listed in the parts books.
CAUTION:Do not hammer on steering column shaft. This may cause damage to the shaft or bearing.
CAUTION:Do not attempt to remove the pivot bolts to disassemble the tilting mechanism.
The ignition key must be in the key cylinder for cylinder removal. The key cylinder must be removed first before removing ignition switch.
1.Remove the negative (ground) cable from the battery.
2.Disable the airbag.
3.Remove the kneeblocker and steering column reinforcement panel.
4.Remove the lower and upper shrouds.
5.Remove key cylinder.
6.Remove the tilt lever release knob bracket. (if equipped).
7.Disconnect the electrical connector at rear of ignition switch (4).
8.Remove ignition switch mounting screws (2).
9.Using a small screwdriver, push on locking tab (3) and remove switch (1) from steering column.