BMW Thermostats for BMW 3 Series F31 (2014+)

Water Pump & Thermostat Kit - Gen 1 B46 2.0L

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T#:35863149

Part#: 11518638026TKT

Ships on Jul 29, 2026

$ 681.66 USD

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BMW's cooling system has long been a known weak spot, with the water pump and thermostat being two of the most common trouble areas. This remains true even in the latest B-Series engines found in 2016 and newer BMW models. This kit includes a brand-new OEM Pierburg water pump, a Bremmen thermostat (now referred to as a Heat Management Module), and one gallon of BMW's G48 coolant concentrate (enough to make two gallons of 50/50 coolant). Avoid spending thousands at the dealership or over $600 on Genuine BMW parts! These components can be replaced with high-quality OEM parts in just an afternoon using basic hand tools.

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Water Pump & Thermostat Kit - BMW F30/F31 328d, F25 X3 28d xDrive...

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T#:48160285

Part#: 11518516204KT2

Ships on Sep 30, 2026

Sale - Save 6% $ 314.99

This product was last offered at the strikethrough price on
03-04-2026

$ 296.95 USD

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$ 314.99

This product was last offered at the strikethrough price on
03-04-2026

$ 296.95 USD

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It is important that your coolant system is serviced at regular intervals to ensure a long life. Over time, coolant systems are exposed to high temperatures and repeated thermal cycling, which causes warping, cracking, and hardening of plastics and rubber components in the coolant system. This can lead to coolant leaks and overheating, which can result in extensive engine damage if not resolved in a timely manner. This Water Pump & Thermostat kit helps to address a few of the most problematic parts, replacing these items entirely to keep your cooling system running optimally and efficiently.

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ECS Billet Cylinder Head Outlet Hose Adapter - BMW N52 N54 N55 3.0L N...

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T#:556105

Part#: 024797ECS01

In Stock

Sale - Save 25% $ 74.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.24 USD

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$ 74.99

This product was last offered at the strikethrough price on
05-03-2026

$ 56.24 USD

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Some of the biggest issues when owning a BMW can come from cooling system components. Even through years of improvement, the same failure is seen with the plastic fittings and adapters from years of hot to cold temperature fluctuation. The N52/N54/N55/N20 engine sees failure at the plastic cylinder head outlet adapter connecting the cylinder head to the thermostat hose. The stock plastic adapter simply shears off at the end of the barbed fitting, creating a massive coolant leak. The engineering team at ECS Tuning decided a billet aluminum piece was a much better option to contend with the temperature fluctuation. Since other offerings on the market want you to modify your OE hose to be reused, they even developed a silicone replacement hose. These 2 pieces can be purchased separately if you decide to reuse your existing OE hose or in a package kit together for a single click upgrade. Features: Manufactured from billet 6061-T6 with type III anodized for exceptional durability and corrosion resistance. Much stronger part than OEM plastic Will not become brittle and fatigued over time due to thermal cycling. This will prevent the part from breaking during removal and re-installation. Follows OEM form for perfect fitment. Utilizes (and includes) OEM O-ring 11537545278 to ensure a proper seal. Recommended clamp size is 25-40mm

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Thermostat With Aluminum Housing - N20

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T#:30828065

Part#: 11538635689M

In Stock

Sale - Save 20% $ 125.99

This product was last offered at the strikethrough price on
05-03-2026

$ 100.36 USD

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$ 125.99

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$ 100.36 USD

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BMW N20 2.0L Thermostat With Housing

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T#:18003828

Part#: 11538635689

In Stock

Sale - Save 20% $ 67.99

This product was last offered at the strikethrough price on
05-03-2026

$ 54.39 USD

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$ 67.99

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$ 54.39 USD

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BMW N20 2.0L Thermostat With Housing ensures optimal engine performance by maintaining the correct operating temperature. This crucial component regulates coolant flow, preventing issues related to overheating or inadequate cooling. The thermostat plays a vital role in your BMW’s temperature gauge, influencing engine efficiency and longevity.

Precision Temperature Control: Maintains the engine within the ideal temperature range for optimal performance and efficiency.
Complete Assembly: Includes the thermostat and housing, offering a convenient and comprehensive solution for replacements.
Reliable Operation: Helps prevent common issues such as overheating or running too cool by regulating coolant flow effectively.
Enhanced Engine Life: Ensures the engine operates under ideal conditions, extending its lifespan and improving overall performance.
High-Quality Construction: Designed to meet or exceed OEM specifications, providing durability and reliable performance.

Upgrade your BMW with the N20 2.0L Thermostat With Housing to ensure reliable temperature management and enhanced engine performance.

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Thermostat - B48

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For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines

T#:23648673

Part#: 11537644811

In Stock

Sale - Save 15% $ 223.99

This product was last offered at the strikethrough price on
05-03-2026

$ 190.39 USD

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$ 223.99

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05-03-2026

$ 190.39 USD

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Mahle-Behr Thermostat With Housing - E84, F10, F22, F26, F30, F31, F3...

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T#:363991

Part#: 11537633476

In Stock at Vendor

$ 106.85 USD

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$ 106.85 USD

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No heat? Overheating? Time for a cooling system service.

Genuine BMW - Thermostat with housing and gasket - 11537644811 ...

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For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines

T#:539226

Part#: 11537644811

In Stock

10% off MSRP $ 602.99

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

$ 544.99 USD

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10% off MSRP

$ 602.99

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

$ 544.99 USD

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11537644811 - Thermostat with housing and gasket. The thermostat controls the flow of coolant based on temperatures in the engine. This is a crucial component to your cooling system and making sure your car is operating properly.

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Genuine BMW Thermostat With Housing - N20

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T#:367096

Part#: 11538635689

In Stock

14% off MSRP $ 155.99

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

$ 138.99 USD

Limited Qty Sale

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14% off MSRP

$ 155.99

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

$ 138.99 USD

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N20 thermostats are prone to failure - replace yours today with a Genuine BMW replacement.

Turner Motorsport is proud to be your source for Genuine BMW parts.

Mahle-Behr Thermostat - F10, F15, F30, F31

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T#:591727

Part#: 11518512234

Ships in 10 Business Days

$ 82.99 USD

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$ 82.99 USD

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No heat? Overheating? Time for a cooling system service.

BMW B46 B48 Thermostat With Housing And Gasket

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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat! For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines

T#:27372124

Part#: 11537644811

Back Ordered

$ 265.99 USD

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$ 265.99 USD

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BMW B46 B48 Thermostat With Housing And Gasket is an essential component for maintaining optimal engine performance and cooling efficiency. This high-quality thermostat comes complete with housing and gasket, ensuring a precise fit and reliable operation.

The thermostat plays a crucial role in regulating the flow of coolant based on engine temperature. By controlling this flow, it helps maintain the engine at its optimal operating temperature, preventing overheating and ensuring efficient performance.

Complete Assembly: Includes thermostat, housing, and gasket for easy installation.
Optimal Cooling: Regulates coolant flow to maintain proper engine temperature.
Enhanced Performance: Ensures your engine operates within its ideal temperature range.
Durable Construction: Made with high-quality materials for long-lasting reliability.

Ensure your BMW's cooling system is functioning correctly with this reliable thermostat assembly from Turner Motorsport.

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Genuine BMW Water Pump & Thermostat Kit - Gen 1 B46 2.0L ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:35863148

Part#: 11518638026KT

In Stock

$ 754.99 USD

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$ 754.99 USD

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The cooling system has always been a weak point for BMW. Two of the biggest issues are the water pump and thermostat. This continues to be true even on the newest B-Series engines found in 2016+ BMWs. This kit includes a brand new Genuine BMW water pump, a new thermostat (now referred to as a Heat Management Module), and 1 gallon of BMW's G48 coolant concentrate (makes 2 gallons of 50/50 coolant). Don't spend thousands of dollars at the dealership, these can easily be replaced in an afternoon with basic mechanic's tools.

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Rein Thermostat Assembly - F Chassis, G-Chassis - B48

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T#:53891628

Part#: 11537644811

Ships in 4 Business Days

$ 322.99 USD

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$ 322.99 USD

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Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.

Genuine BMW Water Pump & Thermostat Kit - BMW F30/F31 328d, F25 X...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:48160261

Part#: 11518516204KT

Ships in 1-2 days

$ 451.99

This product was last offered at the strikethrough price on
03-04-2026

$ 437.99 USD

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$ 437.99 USD

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It is important that your coolant system is serviced at regular intervals to ensure a long life. Over time, coolant systems are exposed to high temperatures and repeated thermal cycling, which causes warping, cracking, and hardening of plastics and rubber components in the coolant system. This can lead to coolant leaks and overheating, which can result in extensive engine damage if not resolved in a timely manner. This Water Pump & Thermostat kit helps to address a few of the most problematic parts, replacing these items entirely to keep your cooling system running optimally and efficiently.

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Meyle Thermostat Housing - BMW E84, F10, F22, F26, F30, F31, F32, F33...

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We Price Match - Give Us A Call or Chat!

T#:5704976

Part#: 11538635689

Special Order: No Guaranteed ETA

$ 72.99 USD

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$ 72.99 USD

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When it comes to your temperature gauge on your instrument cluster your thermostat plays a large role in where that temperature needle ends up. There are many cases where the vehicle will run a bit cool according to that gauge, oftentimes meaning the thermostat has failed and is stuck open allowing coolant to continuously circulate. The other more damaging side is when it closes shut and keeps the engine from cooling down properly. All vehicles are designed to operate in an ideal temperature range for the ultimate efficiency, life, and performance.

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BMW Thermostats for BMW 3 Series F31 (2014+)

Water Pump & Thermostat Kit - Gen 1 B46 2.0L

Water Pump & Thermostat Kit - BMW F30/F31 328d, F25 X3 28d xDrive...

ECS Billet Cylinder Head Outlet Hose Adapter - BMW N52 N54 N55 3.0L N...

Thermostat With Aluminum Housing - N20

BMW N20 2.0L Thermostat With Housing

Thermostat - B48

Mahle-Behr Thermostat With Housing - E84, F10, F22, F26, F30, F31, F3...

Genuine BMW - Thermostat with housing and gasket - 11537644811 ...

Genuine BMW Thermostat With Housing - N20

Mahle-Behr Thermostat - F10, F15, F30, F31

BMW B46 B48 Thermostat With Housing And Gasket

Genuine BMW Water Pump & Thermostat Kit - Gen 1 B46 2.0L ...

Rein Thermostat Assembly - F Chassis, G-Chassis - B48

Genuine BMW Water Pump & Thermostat Kit - BMW F30/F31 328d, F25 X...

Meyle Thermostat Housing - BMW E84, F10, F22, F26, F30, F31, F32, F33...

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