So i recently bought a 03 coupe Brembo Package it has a hole in the block.. it has a key with no sensor. I have a parts car with harness,ecu, key with chip and immobilizer. If i swaped everything from parts car to my car will it start? or will i have problems with the key situation?
Also is the immobilizer the black thing near the key? lol or am i missing something?

Or will it be easier to have some locksmith show up and just program a new key to the car? thanks for the info.