I have a 03 infinity G35 coupe and I want to know if a 04 infinity G35 engine assembly 3.5L vinc 4th digit will fit into my 03?

 

The engine will fit, only thing to worry about (off the top of my head) is the pilot bushing if engine has a different transmission than what is in your car.

 

 

Yes it's the same engine, and as the other poster said just check the pilot bushing, 5AT uses a different bushing than the 6MT. If it's a used engine then you will definitely be replacing the pilot bushing anyways, plug they're like $5 so it's not a big deal to replace.

 

Ok thank you I really appreciate the info!