Hose Breather Oil Seperator (N52) (BMW 1 Series E81/E87 / 3 Series E90 / 5 Series E60 / Z4 E85/E86) is a mechanical component designed for specific BMW models using the N52 engine. This part plays a crucial role in the vehicle’s breather system, managing oil vapors from the engine crankcase and preventing them from entering the intake system, which helps maintain engine efficiency and cleanliness.
The unit is suited for several BMW models including the 1 Series (E81, E87), 3 Series (E90), 5 Series (E60), and Z4 (E85, E86). When considering a replacement, it is important to compare this unit with the existing breather oil separator on your vehicle, ensuring you reference the correct engine type (N52) and corresponding BMW chassis codes to avoid mismatched parts.
This part belongs to the oil management category, serving an essential function in controlling oil breather flow and reducing contamination of intake air. If the original breather oil separator shows signs of clogging, oil leaks, or other faults, this component presents a necessary maintenance or repair option to restore proper breather function.
- Designed specifically for BMW N52 engines
- Compatible with multiple BMW series and chassis
- Critical for controlling oil vapor flow in the crankcase breather system
If this repair may need matching clips, brackets, lights, panels or more than one part, check more Oil, Quick Repair Bundle or Request a Part before ordering.





