If you're experiencing engine overheating, fluctuating temperature readings, or a check engine light related to coolant temperature, it's time to replace your BMW thermostat. This high-quality Coolant Thermostat Assembly from Frey is designed for BMW models powered by the N52 and N54 engines, offering a reliable and cost-effective solution to maintain optimal engine operating temperature.

This OEM-equivalent replacement thermostat fits a wide range of BMW 1 Series, 3 Series, 5 Series, 7 Series, X1, X3, Z4 models including the 130i, 323i, 325i, 330i, 335i, 523i, 525i, 530i, 630i, and 730i. The thermostat is engineered to deliver efficient coolant flow, precise thermal management, and consistent performance across different driving conditions.

Compatible with the Following BMW Part Numbers:

• 11537549476
• 11537544788
• 11537536655

These part numbers are commonly used in both N52 and N54 engine configurations found in many BMW vehicles manufactured between 2004 and 2016.

Compatible BMW Models and Production Years

BMW 1 Series:

• E81 (02/2006 – 12/2011)
• E87 (03/2005 – 06/2011)
• E82 / E88 (11/2006 – 10/2013)

BMW 3 Series:

• E90 / E91 (02/2004 – 12/2011)
• E92 / E93 (05/2005 – 10/2013)

BMW 5 Series:

• E60 / E61 (07/2004 – 12/2009)

BMW 6 Series:

• E63 / E64 (02/2004 – 07/2010)

BMW 7 Series:

• E65 / E66 (06/2004 – 07/2008)

BMW SUV Models:

• X1 (E84: 09/2008 – 08/2011)
• X3 (E83: 02/2006 – 08/2010)

BMW Roadsters:

• Z4 (E85 / E86: 10/2004 – 08/2008)
• Z4 (E89: 01/2008 – 08/2016)

This broad compatibility makes it the go-to choice for BMW thermostat replacement for drivers and repair shops alike.

Why You Need a Functioning BMW Thermostat

The thermostat in your BMW engine plays a critical role in regulating coolant temperature. When the engine is cold, the thermostat remains closed to help the engine warm up quickly. As the engine reaches operating temperature, the thermostat opens to allow coolant to flow, preventing overheating.

A failing thermostat can lead to:

• Engine overheating
• Poor fuel efficiency
• Engine misfires
• Erratic temperature gauge readings
• Check Engine Light (CEL)

Ignoring a faulty thermostat can lead to costly engine damage. That’s why replacing it with a reliable aftermarket part like this Frey BMW thermostat is a smart preventive measure.

Features & Benefits:

• High-Quality Frey Brand: Trusted in the aftermarket for European vehicle parts, Frey offers durability and reliability at a fraction of OEM costs.
• Perfect Fit for BMW N52 / N54 Engines: Ensures plug-and-play compatibility without modification.
• Thermostat Housing Included: This is a complete thermostat assembly with integrated housing, saving installation time and ensuring a leak-free seal.
• Precision-Engineered Valve Mechanism: Controls coolant flow accurately to prevent overheating or overcooling.
• Compatible with Coolant Temperature Sensor (if required by model).
• Made from Heat-Resistant Materials: Built to withstand extreme temperatures and coolant pressures.

Common Symptoms of a Bad BMW Thermostat:

• Engine takes too long to warm up
• Overheating during idling or in traffic
• Coolant leaks near thermostat housing
• Trouble codes like P0128 – Coolant Temperature Below Thermostat Regulating Temperature
• Sudden coolant temperature drops or spikes

If your vehicle is showing any of the above signs, it’s time for a thermostat replacement.

Designed for BMW N52 and N54 Engines

This thermostat assembly is optimized for use with the BMW N52 (naturally aspirated inline-six) and N54 (twin-turbocharged inline-six) engines. These engines are known for their smooth power delivery and performance, but require proper cooling to maintain reliability. Installing a fresh coolant thermostat is essential to prolong engine life and ensure optimal efficiency.

Applications by Engine:

• N52 Engine: 323i, 325i, 330i, 523i, 525i, 530i, 630i, 730i
• N54 Engine: 335i, 135i, 535i, Z4 35i, X1 35i

Why Buy from Us?

We specialize in BMW service parts and source only genuine and premium aftermarket components. Our products are ideal for BMW enthusiasts, mechanics, and dealers looking for dependable replacements without paying OEM prices.

• Fast shipping within Nairobi and East Africa
• Bulk pricing for auto garages and resellers
• Technical support available for installation inquiries

Order Today for Reliable BMW Cooling Performance

Don’t wait for your engine to overheat. Replace your BMW N52 / N54 thermostat with this Frey unit and restore your vehicle's cooling system to peak condition. Contact us via phone or WhatsApp for more information or to confirm vehicle fitment.

Call/WhatsApp: +254 724 040 748

Email: [email protected]

Location: Baricho Road, Industrial Area – Nairobi