Meanwhile, the 335i’s N55 engine has earned a bulletproof reputation as one of BMW’s most reliable turbo sixes, especially ...

Dive into the exhilarating world of BMW's iconic N55 engine as we explore its distinctive sounds. In this video, you'll ...

What’s nice about the N55 engine is that BMW solved many of the woes from the N54, mostly due to using a single turbo instead of a twin-turbo setup and having a few engineering revisions.

It featured an N55 engine instead of the S55 used in the M3 and M4. But that changed with the M2 competition and CS which are now among the best sports cars in their class.

Black said that BMW’s with N20 and N55 engines (which are commonly seen on the 3 Series and X3) usually start to break down within the 70,000 to 100,000 mile range.

And with the change from the old days of them being rear-wheel driven and powered by those legendary N54 and N55 engines, dare I say it, the car has become more civilised in M135 xDrive guise.