BMW N55 Bulletproof Crank Kit Crank Hub Fix with Vargas Crank Bolt Capture & Seal Plate, Belt Ingestion Prevention | Reliability Kit for F30 335i, F32 435i, F22 M235i, F87 M2

Ultimate N55 Reliability Upgrade for BMW F-Series 3.0 Turbo Six

Protect your N55 from crank sprocket slip, bolt loosening and auxiliary belt suck-in with a proven anti-slip hub solution that enthusiasts trust. This comprehensive package pairs Vargas hardware with a full front-of-engine refresh to safeguard timing, prevent belt debris entering the sump and keep your straight six running flawlessly on fast road, track days and remapped builds.

What this upgrade addresses

• Factory hub design with no keyway can allow timing drift under load, risking valve-to-piston contact and engine damage.
• Auxiliary belt failure can be drawn past the front crank seal by the damper, contaminating the oil system and blocking the oil pick-up strainer.
• Oil filter housing gasket leaks are common on the N55, leading to oil weeps, potential oil and coolant cross-contamination and messy engine bays.

How the package solves it

• Vargas bolt retention device secures the crank bolt to the hub and damper, adding a robust mechanical clamp to resist movement under hard launches and aggressive shifts.
• Vargas front main seal shield closes the gap behind the crank damper to help stop shredded belt material being pulled into the timing case and sump.
• Accessory drive overhaul with genuine BMW belt, tensioner and idlers for quieter, dependable operation.
• Fresh consumables included high quality oil, filter and coolant so the job is completed to a high standard in one visit.

Kit contents

• Vargas Turbo bolt retention cover
• Vargas Turbo front seal guard plate
• Genuine BMW auxiliary belt
• Genuine BMW belt tensioner and idler pulleys
• Liqui-Moly Longtime High Tech 5W-30 engine oil, 7 litres
• Hengst oil filter
• Genuine BMW oil filter housing and oil cooler housing gaskets
• ECS oil change reminder label
• Genuine BMW coolant concentrate, 1 litre

Why enthusiasts choose this package

• Prevents hub slip and timing movement on tuned and stock engines.
• Helps stop auxiliary belt debris entering the sump through the front seal.
• Front-of-engine service included for long-term reliability and leak-free running.
• Ideal for Stage 1, Stage 2 and hybrid turbo N55 setups as well as daily drivers.
• Far cheaper than a rebuild or cylinder head repair caused by timing events.

Real-world results We have installed this package on customer N55 cars and our own builds. Feedback has been excellent with stable cam timing, quiet belt operation and the confidence to drive hard without worrying about sprocket slip or belt fibres in the oil.

Maintenance tip

OFHG replacement is recommended every 40,000 to 60,000 miles on N55 engines. This package includes new gaskets to address that known weak spot while you are in there.

Compatibility

• BMW F22 M235i N55 3.0L
• BMW F22 M235i xDrive N55 3.0L
• BMW F23 M235i N55 3.0L
• BMW F23 M235i xDrive N55 3.0L
• BMW F30 335i N55 3.0L
• BMW F30 335i xDrive N55 3.0L
• BMW F30 ActiveHybrid 3 N55 3.0L
• BMW F32 435i N55 3.0L
• BMW F32 435i xDrive N55 3.0L
• BMW F33 435i N55 3.0L
• BMW F33 435i xDrive N55 3.0L
• BMW F34 335i xDrive N55 3.0L
• BMW F36 435i N55 3.0L
• BMW F36 435i xDrive N55 3.0L
• BMW F87 M2 N55 3.0L

Professional fitting

Installation available at MJ Modifications, Warwickshire. Request a tailored quote and booking availability by emailing info@mjmodifications.co.uk.

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Buy with confidence This is a smart preventative upgrade for the N55 community that delivers peace of mind and dependable performance. If you are searching for a UK-based, proven solution to safeguard your BMW’s timing and oil system, this package is the one to choose.