MAHLE 11-53-8-671-517 Map-Controlled Engine Coolant Thermostat Assembly with Housing

The MAHLE 11-53-8-671-517 (also known as MAHLE TM2197) is a complete map-controlled thermostat assembly designed to maintain optimal engine operating temperature. This OEM-quality component is engineered to regulate coolant flow precisely, ensuring efficient engine operation while minimizing wear and emissions.

Key Features:

• Complete assembly includes thermostat, housing, and gasket for direct replacement
• Map-controlled design with integrated electrical heating resistor for precise temperature management
• Wax pellet expansion element that opens and closes valve at specific temperatures
• Manufactured by MAHLE, a world-leading supplier to OEM manufacturers
• Individually calibrated to ensure accurate temperature control
• Direct bolt-on fitment with all necessary sensor and hose connections

The thermostat functions by closing when engine temperature is low, allowing coolant to circulate within the engine block until reaching optimal temperature. Once the engine exceeds its target temperature, the valve opens to allow coolant to flow through the radiator for cooling. This precise temperature regulation is essential for peak engine efficiency, fuel economy, and emissions control.

What's Included: Complete thermostat assembly with housing and gasket, ready for installation.

OEM Cross-Reference: Supersedes BMW part number 11-53-7-580-627 (11537580627). Also identified as MAHLE TM 21 97, V20-99-0167.