Originally Posted by e90pilot
I believe the X3 3.0i has a 328i engine with a 3-stage intake manifold. The parts you need are the same. Can't confirm if the software will work though.
The other thing to consider might be about space issues in the 1 series vs the 3 series or the X3. It might just be more crammed around the intake manifold...? Does this make sense or does same engine
mean same space?