Mosselman MSL Oil Thermostat Install Seal & Gasket Kit – Oil Cooler Hose O-Rings + Oil Filter Housing Seal – BMW N54 N55 S55 | Fits M135i M235i 335i 435i Z4 35i M2 M3 M4

Mosselman MSL Thermostat Seal Set for BMW N54 N55 S55

Get your thermostat swap right first time. This genuine Mosselman sealing set gives you fresh, correctly sized seals for installing the Mosselman MSL thermostat on BMW N54, N55 and S55 engines. New sealing rings for the oil cooler lines and a new filter housing seal restore factory-tight joints and help stop weeping connections on performance builds and daily drivers alike.

We use these kits in-house at MJ Modifications and customers love the result. Clean, dry fittings, no mess, no comebacks. Perfect partner for your Mosselman thermostat upgrade on tuned straight-six turbo cars used on road or track.

Why this sealing kit

• Prevents leaks at the oil cooler hoses and oil filter housing during thermostat installation
• Precisely matched to BMW N54, N55 and S55 engines for a snug, OE-style fit
• Oil resistant materials for long-term reliability on high performance applications
• Ideal preventative maintenance when fitting or servicing a Mosselman thermostat
• Trusted by our workshop for consistent, leak-free results

What is included

• 2 x sealing rings for the oil cooler hoses
• 1 x rubber seal for the oil filter housing

Note: thermostat unit not included.

Compatible models

• BMW 135i E82 N54
• BMW 135i E82 N55
• BMW 1M Coupe E82 N54
• BMW 335i E90 E91 E92 N54
• BMW 335i E90 E91 E92 N55
• BMW Z4 35i E89 N54
• BMW Z4 LCI 35i E89 N54
• BMW Z4 35is E89 N54
• BMW M135i F20 F21 N55
• BMW M235i F22 N55
• BMW M2 F87 N55
• BMW 335i F30 F31 N55
• BMW 335i GT F34 N55
• BMW 435i F32 F33 N55
• BMW 435i Gran Coupe F36 N55
• BMW M2 Competition F87 S55
• BMW M3 F80 S55 including Competition and CS
• BMW M4 F82 F83 S55 including Competition, CS and GTS

Ideal for fixing minor oil seepage at the oil cooler connections and for renewing the oil filter housing seal when installing the Mosselman thermostat on E82, E90, E92, E89, F20, F21, F22, F30, F31, F34, F32, F33, F36, F80, F82 and F87 platforms.

Fitting and support

Want it fitted by pros who know these engines inside out? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Compatibility check

We can confirm fitment before dispatch. Add your UK registration or last 7 of the VIN at checkout and we will verify it suits your car.

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