MMR Performance BMW N55 Oil Pan/Sump Baffle Plate - Anti-Surge Oil Control, 7 Trap Doors - Bolt-In T6061 - Fits F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 M135i M235i 335i 435i - Wet Sump Baffle Kit, Oil Starvation/Pickup Uncovering Fix

MMR Performance N55 Oil Control Baffle for BMW F-Series 1, 2, 3, 4

Keep your N55-powered BMW protected when you drive hard. This MMR Performance oil control baffle is a proven anti surge upgrade for fast road and track use, helping to maintain stable oil pressure during hard braking, long sweeping corners and aggressive direction changes. Designed as a direct-fit insert for the factory wet sump, it is the smart reliability mod for anyone pushing an F-Series M135i, M235i, 335i or 435i.

Built from anodised T6061 aluminium with seven one way trap doors, the baffle keeps oil around the pickup so the pump stays supplied even under high g loads. No welding required and no drama. This is a bolt-in, motorsport inspired solution that delivers consistent lubrication and peace of mind on spirited drives and track days.

Key benefits

• Helps prevent oil pick up uncovering during cornering, braking and acceleration
• Seven trap door flaps improve wet sump oil control and reduce surge
• T6061 anodised aluminium for strength, heat resistance and durability
• Direct bolt-in installation with the sump removed, no welding needed
• Track proven reliability upgrade for the N55 straight six
• Supports stable oil pressure to protect bearings and turbocharger
• Ideal for track days, canyon driving and fast road builds

Compatibility

For BMW F-Series models with the N55 engine:

• F20 F21 M135i
• F22 F23 M235i
• F30 F31 F34 335i
• F32 F33 F36 435i

Fits F-Series 1 Series, 2 Series, 3 Series and 4 Series with the N55 engine.

Real world results

We have installed and run this MMR baffle on our own cars and customer vehicles with excellent feedback. Drivers report greater confidence in long corners, better consistency in heavy braking zones and improved protection during sustained high g running. It is one of the best value reliability upgrades for an N55 that sees enthusiastic use.

Installation and fitting

Bolt-in fitment once the sump is removed. No welding required. We recommend new OE seals and hardware and following BMW torque procedures. A Genuine BMW installation kit is typically used on F-Series N55 applications.

Want it fitted by experts The team at MJ Modifications in Warwickshire can help. Email info@mjmodifications.co.uk for a fitting quote.

Part number

MMR20-0501

Why this upgrade makes sense

High grip tyres, uprated suspension and sticky brakes create loads the standard wet sump was never designed for. This oil control baffle is a simple, cost effective way to improve lubrication stability and safeguard your N55 when you drive it as BMW intended.

Search terms customers use

N55 baffle, oil control tray, anti surge baffle N55, wet sump baffle BMW, trap door baffle N55, BMW F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 oil control, M135i oil control, M235i oil surge, 335i track upgrade, 435i reliability mod, BMW N55 track day parts, BMW oil pick up fix, engine oil pressure stability, performance sump baffle N55, MMR Performance baffle.