Volvo D13 Mack MP8 Thermostat – Mahle Original OE – Replaces 21613426 & 21412639
Regular price
$100.87
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Fitment
Fits these trucks
Volvo D11 engineVolvo D13 engineMack MP7 engineMack MP8 engine
Always confirm your year, make & model before ordering.
Part numbers
OEM & interchange numbers
3 cross-refsVolvo 21613426 Volvo 21237213 Mack 21412639
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview
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.
Specifications
Brand
Mahle Original OE
Technology
Wax-pellet
Grade
Heavy Duty
Compatibility
Modern long-life coolants
Questions
Will this fit my truck?
This part fits Volvo D11 engine, Volvo D13 engine, Mack MP7 engine, Mack MP8 engine. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Volvo 21613426, Volvo 21237213, Mack 21412639.
How fast does it ship?
In-stock orders placed before 12 PM Central on business days ship the same day from our Hanover Park, IL warehouse, and typically arrive in 2 to 5 business days anywhere in the USA.
What's your return policy?
Unused items in original packaging can be returned within 30 days, backed by our 30-day money-back guarantee. If we ship the wrong part, we cover the return label and send the correct one.