Volvo D13 Mack MP8 Thermostat – Mahle Original OE – Replaces 21613426 & 21412639

Maintain your engine’s optimal operating temperature and maximize fuel efficiency with the Volvo D13 Mack MP8 Thermostat by Mahle. As a genuine Mahle Original OE component, this thermostat is the exact part used by manufacturers to ensure precise thermal management. Engineered for the high-demand cooling systems of Volvo D11, D13 and Mack MP7, MP8 engines, it prevents overheating and ensures rapid engine warm-up, protecting your aftertreatment system and internal components from premature wear.

OE Precision: The Volvo D13 Mack MP8 Thermostat Advantage

The Volvo D13 Mack MP8 Thermostat (Automann Part # 840.TH622639MA) is built to rigorous original equipment standards. Unlike standard aftermarket alternatives, this Mahle Original unit features advanced wax-pellet technology that provides consistent opening and closing responses even under extreme pressure and temperature fluctuations. Note: This is a critical "Heavy Duty" component, designed to withstand the corrosive environment of modern long-life coolants while maintaining a leak-proof seal within the housing.

As we continue to build the largest inventory of commercial truck parts in Illinois, we prioritize cooling components that offer factory reliability. This thermostat is a direct OE interchange for Volvo 21613426, 21237213 and Mack 21412639. Because it is a Mahle Original product, you are guaranteed a 1-to-1 fit with factory housings, eliminating the need for modifications.