Based on some quick research, the block assembly on most N55 engines appears to be the same but the oil pan, manifolds and few other components could be different depending on the model & year. I’ll do more research and try to check with local BMW dealership to confirm.

I’d prefer to find another x5 N55 but they tend to be higher mileage since usually driven all year.

Has anyone swapped a N55 from a xdrive car (335xi, 435xi) to an SUV/SAV (X3,X5) ?