i just swapped an S5 n/a engine in my S4 car, i was wondering which sensors need to be changed, the plugs look the same, but im unsure if they will work on the S4 wiring harness. thanks

 

Do a search for "S4 S5 swap". This has been covered a BILLION times before and all the information you could possibly hope to find is here.

 

You will be even happier when you get the Aux ports & VDI working.
It's easy with the S5 ECU, or you could use RPM switches.

 

if u just swapped the shortblock engine and kept all your s4 sensors then you should be fine. that is actually the best and easiest way to do it. i hope you swapped out the front cover on your s4 block to the s5 block so you can use the omp, unless your going pre-mix. what all did you make s5?

just read your sig....

 

im premixing, i just need the sensors then?? ok cool

and as for it being covered a million, STFU, if you cant post something constructive dont post you ******* idiot. im ******* sick and tired of stupid people like you posting to search.