In BMW’s cooling system, the thermostat assembly is a critical component for maintaining stable engine operating temperatures. The stock plastic thermostat is prone to aging and deformation under prolonged high-temperature conditions, often leading to coolant leaks and even engine overheating.

To address this industry-wide challenge, vika has introduced the ADC12 Aluminum Alloy Upgraded Thermostat Assembly, offering a more durable replacement solution for the over 16 million BMW vehicles in circulation worldwide.

Why upgrade your thermostat?

Typically, a thermostat lasts 7-12 years or 100,000–150,000 km of driving. Its original plastic housing may crack after repeated temperature changes.

How to judge if a thermostat has failed?

Abnormal coolant temperature

Weak or slow cabin heating

Significantly increased fuel consumption

Illumination of engine fault indicator

Common failure causes of OEM plastic thermostats:

Push rod failure due to wax leakage or spring aging

Valve sticking

Seal aging or housing cracking due to repeated temperature changes

vika Aluminum Alloy Upgraded Thermostat Assembly

OE Ref. : 11538635689

Material: Upgraded from original plastic to ADC12 aluminum alloy

Four Core Advantages of the Vika Aluminum Alloy Upgraded Thermostat

High Structural Strength: Aluminum alloy offers superior structural strength, effectively mitigating the risk of thread cracking during installation.

Eliminates Leaks: Machined connection points ensure superior roundness and flatness, effectively eliminating leaks in these areas;

Longer Service Life: Unlike plastic, aluminum alloy does not become brittle due to prolonged exposure to high temperatures, significantly extending the component’s lifespan.

Superior Thermal Conductivity: Excellent thermal conductivity helps improve the engine’s overall cooling efficiency, keeping the engine at its optimal operating temperature.

Compatibility Information:

Compatible Models: 1 Series F20 11-15 / 1 Series F20 LCI 15-19 / 1 Series F21 12-15 / 1 Series F21 LCI 15-19 / 2 Series F22 13-17 / 2 Series F23 14-17 / 3 Series F30 11-16 / 3 Series F30 LCI 2015–2019 / 3 Series F31 2012–2015 / 3 Series F31 LCI 2015–2019 / 3 Series F34 2013–2016 / 3 Series F35 2012–2015 / 3 Series F35 LCI 2015–2019 / 4 Series F32 2013–2017 / 4 Series F33 2013–2017/4 Series F36 2014–2017/5 Series F07 LCI 2013–2017/5 Series F10 2010–2016/5 Series F10 LCI 2013–2016/5 Series F11 2010–2013/5 Series F11 LCI 2013–2017/ 5 Series F18 2010–2013 / 5 Series F18 LCI 2013–2017 / X1 E84 2009–2016 / X3 F25 2010–2017 / X4 F26 2014–2018 / X5 F15 2013–2018 / X6 F16 2014–2019 / Z4 E89 2009–2016 

Compatible Engines: 1.6L (N20B16A)/2.0L (N20B20A; N20B20B; N20B20C; N20B20D; N26B20A)

Why Choose vika Thermostats?

The vika 11538635689 aluminum alloy thermostat assembly completely resolves the common issues of the original plastic housing—such as cracking, leaking, and short service life. It offers higher strength, better sealing, and more stable heat dissipation. A single replacement ensures long-lasting, worry-free performance and comprehensive protection for your engine’s normal operation.