Oil Separator (N42 N46) (BMW 1 Series E81/E87 / 3 Series E46 / E90 / X3 E83 / Z4 E85/E86) is listed as an auto-part option. Confirm fitment, part number and compatibility before purchase, especially where vehicle-specific matching is required.
Oil Separator (N42, N46) (BMW 1 Series E81/E87 / 3 Series E46 / E90 / X3 E83 / Z4 E85/E86) is designed to manage crankcase vapour emissions in specific BMW models. This unit fits various BMW engines in the N42 and N46 families and is found on multiple series including the 1 Series (E81, E87), 3 Series (E46, E90), X3 (E83), and Z4 (E85, E86).
The oil separator plays a critical role in the engine’s ventilation system by separating oil from blow-by gases, preventing oil from entering the intake system and reducing emissions. Over time, these separators can become clogged or fail, which may impact engine performance and cause increased oil consumption or smoke. Replacement with the correct part should match the engine code and vehicle series as specified.
When comparing the old part to this component, verify that it is suitable for the N42 or N46 engine variant and intended model series listed in the product title. This will ensure compatibility with the vehicle’s crankcase ventilation system. For buyers needing to confirm fitment or source related components, consulting the sales desk or using vehicle-specific lookup resources is recommended.
Need help matching this item to your vehicle? Use more Oil, Vehicle Parts Finder or Request a Part with your VIN, engine number, part number or clear photos.