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A high-performance BMW oil system is essential for maintaining optimal engine temperature, lubrication, and longevity, especially under high-performance and track conditions. Common issues such as oil overheating, pressure drops, leaks, and sludge buildup can lead to engine wear, reduced efficiency, and potential failure. Upgrading to high-performance BMW oil system components, including high-capacity oil coolers housing, thermostats, or low oil temperature kits ensures superior oil cooling, improved lubrication, and reduced engine heat soak. These upgrades help prevent oil starvation in high-G turns, minimize sludge accumulation, and enhance overall engine durability and performance. Whether pushing your BMW on the track or ensuring long-term reliability for daily driving, Turner Motorsport offers premium OEM and performance BMW oil system components to keep your engine running at peak efficiency.

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N54 & E8x/E9x N55 Mosselman Billet Oil Thermostat

Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
For Gasket/Install kit see T#4799665

T#:4621131

Part#: OTN54.T85

In Stock

$ 379.99 USD

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$ 379.99 USD

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The N54 engine is no stranger to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius. Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is recommended to install the thermostat, especially for cars that are tuned.

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Improved Racing BMW Oil Cooler Thermostat (180F)

Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:27171935

Part#: IRTHERM

Back Ordered

Starting at $ 318.99 USD

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Starting at $ 318.99 USD

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Precise Oil Temperature Control for Your BMW Upgrade your BMW N20, N26, N51, N52, N53, N54, N55, and S55 engine's oil temperature control with Improved Racing's high-performance oil cooler adapter. Designed to address flaws in the factory's restrictive oil cooler adapter and faulty internal flow control valve, this upgrade ensures precise oil temperature control. Improved Racing's thermostat provides quick engine warmup, prevents overcooling, and delivers full oil cooling capacity on demand. Trusted by professional race teams around the globe, Improved Racing's thermostats have proven highly reliable, are backed by a lifetime warranty, and are made in the USA. Option to Use the Factory Oil Cooler and Lines The optional factory oil line adapter allows you to use the factory oil cooler lines for a simple, plug-and-play installation. For maximum performance, the factory oil cooler and lines may be replaced with an aftermarket cooler and AN lines using the AN adapter fittings (-10AN line size is recommended). Please note that some applications, such as most BMW SUV's, use a water-to-oil heat exchangers. These applications require plugging the coolant supply and return ports, as well as adding an external air-to-oil cooler and lines (factory or aftermarket). Please note the Oil cooler adapter cannot be used without an oil cooler.

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Accusump Marine 2 Qt Kit

Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:8246787

Part#: 24-126

Ships on Nov 18, 2026

17% off MSRP $ 1,006.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 839.00 USD

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17% off MSRP

$ 1,006.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 839.00 USD

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Oil Thermostat Caps

Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:21045481

Part#: BMS-TCP

Ships in 1 Business Day

Starting at $ 29.00 USD

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Starting at $ 29.00 USD

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These billet CNC replacement aluminum oil thermostat lids and caps are an excellent way to add some color and style to your N54 N55 S55 engine bay. Anodized black, red or blue. Easy to install and made in the USA. Can be used with or without the BMS Sport Oil Cooler Valve.

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N54 & E8x/E9x N55 Mosselman Billet Oil Thermostat

Improved Racing BMW Oil Cooler Thermostat (180F)

Accusump Marine 2 Qt Kit

Oil Thermostat Caps

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