Burger Motorsports (BMS) BMW B46/B48 Oil Catch Can | Catch Tank | Oil Separator (Discontinued) – Fits 120i 125i 130i 220i 225i 230i 320i 325i 330i 420i 425i 430i – Suggested Alternative: Mishimoto Universal 2‑Port Compact PCV Baffled Catch Can

Heads up: the original BMS catch tank for BMW B46 and B48 is no longer supplied. Looking for a proven replacement that does the same job brilliantly? Choose the Mishimoto Universal Compact 2-port baffled catch can.

Original BMS B46 B48 Catch Tank for BMW 1, 2, 3 and 4 Series — Discontinued

Designed for the BMW 2.0 TwinPower Turbo four-cylinder, this BMS unit was the go-to blow-by control upgrade for drivers who wanted to protect their engine from oily vapour and keep intake tracts cleaner over time. It captures crankcase mist before it coats charge pipes, intercoolers and intake valves, helping maintain performance on daily drivers and mapped cars alike. We have installed this setup for customers and feedback has consistently been excellent.

Why owners loved this setup

• Helps reduce blow-by contamination in the intake system on B46B20 and B48B20 petrol engines
• Aids in slowing DI valve deposit build-up for smoother running and consistent power
• Dual internal baffles for effective separation with free-flowing ventilation
• Large 16 mm plus hose fittings that exceed factory PCV sizing for proper breathing
• Fully sealed closed-loop configuration with no vent to atmosphere smells
• Cold-side engine bay mounting for improved vapour condensation
• CNC billet aluminium can, black anodised finish, made in the USA with a lifetime guarantee on the can

Engineered for the BMW B-series PCV system

Generic catch tanks often use small hoses and restrictive internals that can upset crankcase pressure. This application-specific solution was built around the B46 and B48 ventilation characteristics, separating oil mist efficiently while maintaining correct PCV flow.

Service and use

• Typical install time around 20 minutes with basic tools
• Fully reversible
• Easy maintenance by unscrewing the base every 3 to 6 months or via the integrated 1/8 NPT drain port

Fitment note

Requires the BMS B46 Intake or BMS B48 Intake for installation.

Vehicle applications

BMW 1 Series F20 F21: 120i 125i 130i including xDrive where applicable

BMW 2 Series F22 F23: 220i 225i 230i including xDrive where applicable

BMW 3 Series F30 F34: 320i 325i 330i including xDrive where applicable

BMW 4 Series F32 F33 F36: 420i 425i 430i including xDrive where applicable

Compatibility check

We will confirm suitability before dispatch using your UK registration or the last 7 of your VIN. Add your vehicle details at checkout for peace of mind.

Professional fitting

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. For a quote email info@mjmodifications.co.uk.

Part number

BMS099

Recommended alternative

Since the BMS can is discontinued, the popular replacement is the Mishimoto Universal Compact Baffled Catch Can 2-port. It is a high quality two-port compact oil separator that suits custom PCV layouts on B46 and B48 engines.

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