This includes lining up pipes behind BMW’s N52 inline-six, and its great-sounding cat-back option (Heads-up, at the time of this writing, there’s a sale on it for 128i owners).

BMW's N52 engine is popular among automobile enthusiasts, but it's not all rosy. Some years are better than others, according to those same gearheads.

BMW's N51 and N52 engines are practically identical, ... are offset by its superior intake manifold and factory tuning. The changes don't affect the N51's reliability either, ...

BMW's final naturally-aspirated inline-six had its flaws but stood out as the best of its generation. TopSpeed. Here's What Makes The BMW N52 Inline-Six Engine So Reliable.

But the aftermarket is usually always better for this type of part, and in my case, I decided to throw on Turner Motorsport’s N52 intake for the E8X and E9X BMW chassis.

The N52 engine uses four of them, and the part number of the VANOS housing bolt is 8602263 in BMW's parts system. Regarding the 155,627 affected vehicles, the list kicks off with the Z4 sDrive30i ...