Has anyone done this? Replaced to an older gen seat? From 05 down to 03/04? Replacing my busted driver 05 seat with an 04 driver seat finding less buttons and my cars third harness leads to no where. Will it be safe for my ECU, fuses, etc...?

 

Some swaps are plug and play and some require a little re-wiring when it comes to swapping seats from coupe to sedan. A coupe to coupe, not sure there. It will also depend if the seats you are swapping have heaters and/or the memory seat function. I might be wrong but the I-key and memory seats didn't appear as an option until 06, not sure though. If all fails and you already have the seats put the replacement in, hook up what fits and turn the car on to see if all functions work.