A-Premium Turbocharger Oil Return Line (Outlet) — BMW N55B30A

A-Premium engineered this line to mirror factory tolerances in both material construction and dimensional accuracy. The result is confident seating at both the turbocharger outlet and the crankcase return port, with a proper seal that holds up to the heat cycles and oil pressures the N55 generates in normal and spirited driving. Whether you're chasing an existing leak on a high-mileage turbo car, completing a full turbo reseal, or just doing preventive maintenance, dropping in a fresh return line is low-cost protection against far more expensive turbo damage.

Fitment coverage for this single part is remarkably broad — the N55B30A engine appeared across more than 30 distinct BMW model and year combinations between 2010 and 2019. That includes the F20 M235i, F30/F31 335i, F32 435i Gran Coupe, F10 535i, F06 640i xDrive Gran Coupe, F01 740Li, the F87 M2, and every X-series SUV from the E84 X1 through the F16 X6. Before ordering, confirm your specific model year and engine code against the full fitment list to ensure this is the correct outlet-side line for your application.