Hey someone can tell me is it the same engine in 2014 is250 and 2010 is250?
I bought one in action and its got water damage, now I want to swap it from 2010.

 

2011-2015 IS250 use the same engine (provided it is RWD or AWD).

2010's have basically the same engine, though there are a few small differences. Nothing that matters.

Swap over the electronics and wiring from your 2014 to the 2010 engine and you should be good to go.

Jeff

 

why not upgrade to the 350? size wise, they are identical. the price difference is negligible, and since you're swapping all electronics anyway (ecu included) why not!