URO 11538671517 Engine Coolant Thermostat / Water Inlet Assembly

Reliable Engine Coolant Thermostat for BMW 528i and 7 Series

The URO Engine Coolant Thermostat / Water Inlet Assembly (Part Number 11538671517) is designed specifically for BMW 528i, 740i, and 740Li models. Engineered to maintain optimal engine temperature, this thermostat ensures efficient cooling system performance and helps prevent overheating.

• Compatible with BMW 528i, 740i, and 740Li models
• Opening temperature set at 97°C for precise temperature regulation
• Durable stainless steel thermostat material for long-lasting operation
• Black PPA-GF35 housing material offers strength and heat resistance
• Inside diameter of 39 mm and maximum height of 147 mm for exact fitment

Product Features and Specifications

This URO thermostat assembly features a stainless steel thermostat that opens at 97 degrees Celsius, ensuring your BMW engine reaches and maintains the correct operating temperature. The housing is constructed from PPA-GF35, a reinforced polymer that provides durability and resistance to heat and chemicals commonly found in engine coolant systems. With an inside diameter of 39 mm and a maximum height of 147 mm, this part matches OEM specifications for a precise fit. Note that this assembly does not include a temperature sensor, gasket, or bleeder screw.

Purpose and Common Applications

This engine coolant thermostat assembly is used to regulate coolant flow within the engine cooling system, helping to maintain optimal engine temperature. It is compatible with the following BMW models:

• BMW 528i
• BMW 740i
• BMW 740Li

Common issues this part addresses include:

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Erratic temperature gauge readings
• Coolant leaks around the water inlet assembly
• Reduced engine efficiency caused by improper coolant flow

Installation Notes and Tips

When installing the URO 11538671517 thermostat assembly, ensure the engine is cool before beginning work. Verify that the mating surfaces are clean and free of old gasket material, as this part does not include a gasket or seal. Proper torque specifications should be followed to avoid leaks or damage. Since this assembly does not include a bleeder screw or temperature sensor, reuse existing components if applicable or replace separately as needed.

Quality Assurance and Warranty

URO parts are manufactured to meet or exceed OEM standards for fit, form, and function. The stainless steel thermostat and reinforced polymer housing provide durability under normal operating conditions. While no specific warranty information is provided here, URO typically offers coverage against manufacturing defects. Always consult the product documentation or supplier for detailed warranty terms.