im sure this has been asked but im putting a s5 motor into a s4 car and i just need a quick answer. Im assuming i have to switch ecu main harness and UIM/LIM and water pump. so is taking all the accessories off s5 and installing in s4 car best way and is there any tricks that I should know about as far as unforseen problems that I will run into. Thanx for help.

 

to be honnest, iv switched two connectors (thermister and alt, with the exception of the injector clips im about to switch, so i can run the s5 high impedance's) on my s5 motor and blocked off my omp thats about all iv done in my swap and, hopefully, wont see any problems out of it.