BMW Thermostats for BMW 3 Series F31 (2014+)

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BMW thermostats are known to fail, but luckily they typically fail wide open - meaning that your car can still cool. We offer thermostats from various OE suppliers we trust along with upgraded motorsport specific thermostats where applicable to make sure your BMW stays cool on track.

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Water Pump & Thermostat Kit - Gen 1 B46 2.0L

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T#:35863149

Part#: 11518638026TKT

In Stock

Sale - Save 5% $ 731.99

This product was last offered at the strikethrough price on
06-30-2026

$ 696.75 USD

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Sale - Save 5%

$ 731.99

This product was last offered at the strikethrough price on
06-30-2026

$ 696.75 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 N47...

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T#:48160285

Part#: 11518516204KT2

Ships on Oct 30, 2026

$ 318.02 USD

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$ 318.02 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% $ 76.99

This product was last offered at the strikethrough price on
06-14-2026

$ 57.74 USD

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Sale - Save 25%

$ 76.99

This product was last offered at the strikethrough price on
06-14-2026

$ 57.74 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

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

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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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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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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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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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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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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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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Genuine BMW - Thermostat with housing and gasket - 11537644811 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines

T#:539226

Part#: 11537644811

In Stock

Sale - Save 5% $ 544.99

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

$ 517.48 USD

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Sale - Save 5%

$ 544.99

This product was last offered at the strikethrough price on
06-25-2026

$ 517.48 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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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 N47...

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

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

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