A4 1.8tfsi swap
 

Hi I have a 2009 A4 1.8tfsi with a blown engine, I have access to a 2003 A4 1.8T B6.
I'm thinking to swap the engine into the 2009 model
Are these engines interchangeable. Otherwise is there much work required to "make it fit"

Original engine number CDH 063639
B6 engine number is BFB 045xxx (couldn't see the last 3 digits)

Appreciate your feedback
cheers Joe