Rein CTA0052 Engine Coolant Thermostat Housing Assembly

OE Quality Thermostat Housing Assembly

Rein CTA0052 is an OE quality engine coolant thermostat housing assembly built for precise cooling system control and straightforward replacement. It is engineered for Mercedes-Benz applications where accurate temperature regulation and a direct-fit housing matter for dependable service.

Compatible with select Mercedes-Benz G500, ML500, R500, C55 AMG, CL500, CLK500, CLK55 AMG, CLS500, E500, S350, S430, S500, SL500, C240, C320, CLK320, E320, ML350, G55 AMG, SLK320, CLK430, ML320, ML55 AMG, CL55 AMG, E430, E55 AMG, S55 AMG, ML430, C280, and C43 AMG models.

• Matches original equipment design specifications
• Direct-fit housing assembly for easier installation
• Built to strict engineering standards for materials and tolerances
• Thermostat calibrated to maintain optimal running temperature
• High-quality metal and component construction for durability and service life

Detailed Product Overview

This Rein thermostat housing assembly is designed as a direct replacement for OE thermostat assemblies and is manufactured to meet or exceed original material standards. The housing and thermostat are temperature calibrated for consistent response, helping the cooling system regulate engine temperature as intended. Rein CTA0052 is a practical choice for Mercedes-Benz cooling system repair when the original housing shows wear, leakage, or temperature control issues.

This part cross-references URO 1122030275 for the same application.

Common Cooling System Issues It Can Address

• Coolant leaks at the thermostat housing
• Engine running too cool or too hot
• Delayed warm-up after cold starts
• Temperature fluctuation from a worn thermostat
• Housing wear, cracking, or seal-related failure

Installation Notes and Tips

Verify the vehicle’s engine code and cooling system configuration before installation. Inspect the mating surfaces, hoses, and seals for wear or contamination, and replace any damaged components during service. Proper coolant refill and bleeding are important after thermostat housing replacement to help prevent air pockets and restore stable temperature control.

Quality Assurance

Rein Automotive designs OE quality thermostat assemblies to install, fit, and perform like the original component. CTA0052 is backed by a 24-month/24,000-mile warranty.