For 2010 youd want to try and find the same engine generation. Up to about 2013. You had 2 engine codes for your year, CpMA and CAEB. CPMA was the flex fuel one with the aluminum intake manifold. I did use a later year CPMB (2015) engine in a 2012 Q5 and had to swap over the crank position sensor, aux water pump and a few vacuum lines from the old engine to the new one.
One thing to keep in mind, the later models still suffered from oil consumption due to a bad piston ring design. If you are going with a replacement engine you should plan on replacing pistons and the timing chains since it is out.
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