Burger Motorsports N54 Oil Catch Can / Air Oil Separator (AOS) for BMW 135i 1M 335i E-Chassis E82 E88 E90 E91 E92 E93 - Sealed PCV Crankcase Breather Kit - Billet Black, Under-Cowl Stealth Mount, Plug & Play

BMW N54 Air Oil Separator Upgrade for 135i, 1M and 335i E Chassis

Looking to protect your N54 twin turbo from inlet valve gunk and crankcase mist? This precision billet aluminium air oil separator from Burger Motorsports captures blow-by before it reaches your intake tract, helping to keep charge pipes, intercooler cores and the PCV system cleaner for longer. It is a proven reliability add-on for daily-driven, remapped and track-prepped E8x and E9x models, delivering cleaner running and consistent performance under boost.

We run this unit on our own shop cars and customer feedback has been outstanding. Expect noticeably less oily residue in the intake, smoother response and peace of mind on spirited drives.

Key highlights

• Direct-fit N54 solution with hoses sized for correct crankcase ventilation and stable idle
• Discreet mounting on the cold side under the scuttle for efficient condensation and OEM-like presentation
• CNC machined lightweight billet, anodised black for durability and a factory-style finish
• High-flow, non-restrictive internal baffling to separate air and oil without raising crankcase pressure
• Large diameter ports exceed factory PCV sizing to maintain proper breathing at higher boost
• Sealed system retains factory closed PCV operation with no vent to atmosphere and no smells
• Bolt-on install in around 20 minutes and fully reversible
• Easy servicing via removable base or 1/8 NPT drain provision every 3 to 6 months
• Made in the USA with BMS Lifetime Warranty

What it helps with

• Captures oil mist and blow-by before the turbo inlets to keep the induction system cleaner
• Helps reduce intake valve carbon build up common on direct injection engines
• Keeps VANOS components cleaner for consistent timing and drivability
• Supports reliable power on tuned N54 cars by limiting oil contamination in charge air
• Assists in maintaining effective octane on boost by reducing oil vapour ingestion

Vehicle fitment

BMW 1 Series

• E82 and E88 135i and 1M, 2008 to 2013

BMW 3 Series

• E90 Saloon 335i and 335ix, 2006 to 2011
• E91 Touring 335i and 335ix, 2006 to 2011
• E92 Coupe 335i, 335ix and 335is, 2006 to 2013
• E93 Convertible 335i including xDrive, 2007 to 2013

Note: Designed specifically for the N54 in the models and years listed above.

Install and maintenance

• All hoses, brackets and fixings supplied for a tidy, direct-fit installation
• Under-cowl location on the cool side with short, correctly sized hose runs
• Service by unscrewing the reservoir every 3 to 6 months or use the integrated 1/8 NPT drain

Professional fitting

Prefer us to fit it? MJ Modifications in Warwickshire can install this upgrade for you. Email info@mjmodifications.co.uk to request a quote and availability.

Part number

E-N54-OCC

Brand

Burger Motorsports

Warranty

BMS Lifetime Warranty

Compatibility check

We will verify fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm compatibility.

Popular search terms

BMW N54 air oil separator, N54 PCV system upgrade, BMW 135i crankcase breather kit, 1M oil separator, 335i blow-by fix, E82 E88 E90 E91 E92 E93 AOS, N54 valve coking prevention, BMW twin turbo breather can, sealed PCV catch can kit, black billet aluminium separator, under scuttle stealth mount, E chassis N54 maintenance, tuned N54 reliability mod, UK BMW performance parts.