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DESCRIPTION Regen Switch CONDITION Used BRAND Mack PART NUMBER 21266899 PART NUMBERS 21266899; 1MR4358M3 Function of this partElectrical and electronic components distribute power, control circuits, and communicate over the truck data network. Modules, harnesses, sensors, and switches all work together to support engine, chassis, and cab functions. Why this part mattersModern trucks depend heavily on electronics. A faulty module or harness can cause intermittent issues, fault codes, or no-start conditions, so good OEM electrical parts are valuable for diagnostics and repair. About the brandMack is known for building tough trucks and components for construction, vocational, and highway fleets that need reliable performance day after day. Fitment & usage Used OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment. Note: Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.
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🇺🇸 Ship from USA · On Agora since 2026
$55.00