{"product_id":"mosselman-n55-oil-thermostat-85c-inc-m135i-m235i-335i-m2","title":"BMW N55 85C Low Temp Oil Thermostat | Mosselman OTN55.T85 Cooling Upgrade for F-Series M135i M235i 335i 435i M2 F87 (F20 F21 F22 F30 F31 F32 F33 F34 F36) Oil Cooler Stat \/ Performance Thermostat Direct Fit","description":"\u003cdiv\u003e\n  \u003ch2\u003eKeep N55 oil temperatures under control with the Mosselman 85°C thermostatic upgrade\u003c\/h2\u003e\n\n  \u003cp\u003eBeat heat soak, stabilise oil viscosity and protect your turbocharged straight-six with this 85°C thermostatic oil control unit from Mosselman. On standard hardware, oil temperature on these F series six-cylinder petrol models can creep towards 120°C during enthusiastic driving. This unit begins regulating much earlier at 85°C, typically resulting in an operating window of around 95 to 105°C depending on vehicle, conditions and usage. The result is repeatable performance and improved long-term engine health for fast road and track-day use.\u003c\/p\u003e\n\n  \u003cp\u003eUnlike crude always-open solutions, this is a genuine thermostat that allows proper warm-up in cold weather while delivering stronger temperature management once hot. The high-grade billet aluminium housing is robust, a straight replacement for the factory assembly, and fits cleanly without modification.\u003c\/p\u003e\n\n  \u003ch3\u003eWhy enthusiasts choose this 85°C stat\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eEarlier opening temperature for quicker oil cooling under load\u003c\/li\u003e\n    \u003cli\u003eTypically around 20°C lower peak oil temps than stock, aiding bearing and turbo longevity\u003c\/li\u003e\n    \u003cli\u003eReal thermostat function maintains correct warm-up for year-round drivability\u003c\/li\u003e\n    \u003cli\u003eBillet aluminium body for strength and durability\u003c\/li\u003e\n    \u003cli\u003eDirect-fit replacement - plug-in solution with no coding required\u003c\/li\u003e\n    \u003cli\u003eApprox. 30 minutes install time for experienced technicians\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReal-world benefits\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eConsistent power delivery on spirited drives and track sessions\u003c\/li\u003e\n    \u003cli\u003eMore stable oil pressure and viscosity for reliability\u003c\/li\u003e\n    \u003cli\u003eHighly recommended when tuned or remapped\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eDesigned for BMW F series models with the N55 engine:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 Series M135i - F20 F21\u003c\/li\u003e\n    \u003cli\u003e2 Series M235i - F22\u003c\/li\u003e\n    \u003cli\u003eM2 - F87\u003c\/li\u003e\n    \u003cli\u003e3 Series 335i - F30 F31\u003c\/li\u003e\n    \u003cli\u003e3 Series GT 335i - F34\u003c\/li\u003e\n    \u003cli\u003e4 Series 435i - F32 F33\u003c\/li\u003e\n    \u003cli\u003e4 Series Gran Coupe 435i - F36\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e For E series 135i and 335i with the N55 engine, use the N54-spec oil thermostat.\u003c\/p\u003e\n\n  \u003ch3\u003eRecommended extras\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMSL Installation Kit - helps prevent leaks during refit. Includes 2 x oil hose O-rings and 1 x rubber oil filter housing gasket.\u003c\/li\u003e\n    \u003cli\u003eMSL Titanium GR5 Hex-Race Bolt Set\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitting and service advice\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWe strongly advise replacing engine oil and the filter when installing the thermostat.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation available at MJ Modifications, Warwickshire. Request a quote: \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitment check before dispatch\u003c\/h3\u003e\n  \u003cp\u003eWe can verify compatibility for you. Provide your UK registration number or the last 7 digits of your VIN at checkout and we will confirm before shipping.\u003c\/p\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eOTN55.T85\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eManufacturer\u003c\/h3\u003e\n  \u003cp\u003eMosselman\u003c\/p\u003e\n\n  \u003chr\u003e\n\n  \u003cp\u003e\u003cstrong\u003eTrusted by us and our customers:\u003c\/strong\u003e We run this unit on our own N55-powered cars and it remains a customer favourite for dependable oil temperature control on street and track.\u003c\/p\u003e\n\n  \u003ch3\u003eSearch-friendly terms to help you find this item\u003c\/h3\u003e\n  \u003cp\u003eBMW N55 low temp stat, 85 degree oil thermostat, M135i oil temperature control, M235i oil temp fix, 335i F30 performance thermostat, 435i F32 oil stat upgrade, M2 F87 85C stat, F20 F21 F22 F30 F31 F32 F33 F34 F36 oil temp solution, Mosselman OTN55.T85 UK, N55 heat management upgrade, track day oil temp reduction, BMW turbo straight six thermostat, F series low temperature oil thermostat, BMW N55 reliability mod.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mosselman","offers":[{"title":"Default Title","offer_id":56008670675330,"sku":null,"price":309.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/MosselmanN55OilThermostat85c_Inc.M135i_M235i_335i_M2_-1_1946x_942c5ebb-aa28-436b-b92c-9196e8f80f80.png?v=1764090479","url":"https:\/\/mjmodifications.co.uk\/products\/mosselman-n55-oil-thermostat-85c-inc-m135i-m235i-335i-m2","provider":"MJ Modifications","version":"1.0","type":"link"}