Rein 11-53-7-644-811 Engine Coolant Thermostat with Housing

The Rein 11-53-7-644-811 is a direct-fit replacement engine coolant thermostat designed to restore proper engine temperature regulation. This thermostat corresponds to BMW OEM part number 11-53-7-644-811 and is engineered to meet original equipment specifications for precise fit and reliable performance.

The engine coolant thermostat plays a critical role in your vehicle's cooling system by regulating the flow of coolant between the engine and radiator. A faulty thermostat can result in engine overheating, poor fuel economy, heater malfunction, or the engine running too cold — all of which can lead to accelerated engine wear and increased emissions.

Key Features:

• Direct OEM replacement — matches original equipment specifications
• Engineered for precise opening temperature control to maintain optimal engine operating temperature
• Durable construction for long-lasting, dependable cooling system performance
• Manufactured by Rein Automotive, a trusted supplier of European vehicle components
• Corresponds to BMW OEM part number 11-53-7-644-811

Rein Automotive specializes in high-quality replacement parts for European vehicles. This thermostat is designed for straightforward installation and restores factory-level cooling system performance.