parts approx $150.00(not from factory)
labor approx $100.00 or one hour labor
The best option is probably to replace the entire starter.
buy yourself a repair manual and just do what it says.
Do you like the car? Can you replace vehicle for the cost of repair?
Are you referring to the battery wire that goes to the starter? If so replace the wire. By disconnecting it and follow wire to the starter and replace. Reconnect battery and your done.
You should never do repair work on a vehicle if you are not trained to do so. Find a reputable repairman to replace your infinity's starter.
you would need a repair manual.
Go to NAPA and buy a Repair Manual.
I paid roughly $600-$650 for the whole repair.
Haynes auto repair manual
If the starter is spinning but not catching, the problem lies in the starter drive (also called bendix). You will either have to replace the starter or repair it by replacing the bendix.
if you mean can a novice replace the starter, the answer is yes. any other repairs to starter just depend on what needs replacing
Check with local library for a repair manual, or automedia.com