Mosselman S55 Oil Thermostat 85c (Inc. M2 Competition, M3 & M4) - Silver

Cooler oil temperatures, stronger performance and proven reliability for your BMW S55. This low-temperature oil stat is the go-to heat management upgrade for hard-driven F8x and F87 platforms. Opening at 85°C, it brings lubricant temps under control sooner and helps keep them around the ideal range under load, giving you consistent power on the road and at track days while protecting your twin-turbo straight-six.

We have fitted this on our own and customer cars and the results are superb. Drivers report steadier oil temps during spirited use, improved consistency on back-to-back pulls and extra peace of mind on tuned builds.

• 85°C opening temp for earlier oil flow through the cooler
• Holds temps around 95 to 105°C depending on model and conditions
• Real thermostat design, not a fixed-open plate, so warm-up time remains like factory
• Approximately 20°C lower operating point than the OE setup
• Direct-fit, plug-and-play upgrade with no modifications to factory lines
• Billet aluminium body, silver finish for strength and durability
• Quick install - typically around half an hour for an experienced technician

Why choose this low-temp oil stat

• Ideal for remapped Stage 1 and Stage 2 cars, track-focused builds and hot-climate driving
• Helps stabilise oil temperature for consistent performance and enhanced engine longevity
• Designed specifically for BMW M2 Competition, M3 and M4 S55 applications, with additional N55 fitments

What you receive

• 1 x low-temperature oil thermostat unit in silver

Recommended during installation

• New O-rings for the oil cooler hoses and a fresh oil filter housing gasket to prevent leaks
• Fresh engine oil and filter change at the same time
• Replacement bolts are recommended if yours show wear

Fitment

• BMW F87 M2 Competition - S55
• BMW F80 M3, including Competition and CS - S55
• BMW F82 F83 M4, including Competition, CS and GTS - S55

*Also fits the BMW F30 330e and ActiveHybrid 3 with the N55 engine.

Part number: 030210060

Fitting service

Professional installation available at MJ Modifications, Warwickshire. For a quote and booking, email info@mjmodifications.co.uk.

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