BMW S55/N55 Crank Hub/Crankhub Capture Plate - Crank Bolt Capture - CNC Billet T6061 Anodised - Timing Slip Protection - Fits F80 M3, F82/F83 M4, F87 M2 Competition, M135i, M235i, 335i, 435i, 535i, X3/X4 35i

Engine Timing Security Plate for BMW S55 and N55

Stop crankshaft fastener back-out and keep your BMW’s valve timing locked in with this precision CNC-machined billet T6061 aluminium locking plate. Designed for S55 and N55 powerplants, this hub locking solution captures the OE crankshaft bolt head to prevent rotation, protecting against timing drift on stock, remapped and hard-driven cars. Ideal whether you daily your F-series M car or push it on track days, this anodised capture plate adds affordable, high value insurance for engines known to suffer timing movement from vibration and harmonics.

Key reasons enthusiasts choose this locking plate

• Encapsulates the factory crankshaft bolt head to physically stop loosening and back-out.
• CNC from billet T6061 aluminium with a durable anodised finish for long-term corrosion resistance.
• Elongated mounting slots aid precise fitment and repeatable installation.
• Compatible with the OE three-piece hub and the MMR one-piece hub.
• No engine removal required. Access is achieved with a simple radiator drop.
• Helps prevent timing chain slip and cam timing misalignment that can lead to costly repairs.

Who is it for

Perfect for owners seeking a preventative fix on S55 and N55 platforms, from daily driven cars to tuned builds running higher boost, hybrid turbos, Stage 1 or Stage 2 calibrations. If you want confidence without the full cost of a hub replacement, this bolt capture plate is a smart first step. For maximum protection on high power applications, pairing with a single-piece hub upgrade is recommended.

Fitment

Suits all BMW S55 and N55 applications, including:

• S55: F80 M3, F82 M4, F83 M4, F87 M2 Competition
• N55: F87 M2, F20 F21 M135i, F22 M235i, F30 335i, F32 435i, F10 535i, X3 35i and X4 35i

Real-world confidence

We run this timing security plate on our own cars and our customers consistently report the peace of mind it delivers. It is a high quality, precisely machined solution that does exactly what S55 and N55 owners need for reliability.

Professional fitting

We recommend professional installation. MJ Modifications in Warwickshire can supply and fit this BMW timing security plate. To request a fitting quote, email info@mjmodifications.co.uk.

Good to know

• Works with the OE three-piece hub and MMR single-piece hub.
• Engine stays in situ. Radiator drop required for access.
• Billet T6061 aluminium with anodised finish for durability.

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