Air and Fuel› Intake Manifolds and Components

Genuine

Vacuum Valve

$45.52

SKU: 123 800 00 78

In Stock
In Stock
Ships by Aug 3
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Genuine Mercedes-Benz Valve, part number 123-800-00-78, is a direct replacement component manufactured by Mercedes-Benz to ensure precise fit and function within the vehicle's systems. This valve serves as a central nozzle vacuum element, playing a crucial role in the climate control system by regulating vacuum between the lines and the electro-pneumatic components. Genuine Mercedes-Benz Parts are constructed from premium materials and undergo rigorous testing to guarantee they integrate seamlessly with other vehicle parts and systems. This ensures your Mercedes-Benz continues to perform at its optimal potential, mile after mile. Note: This product is subject to California Proposition 65 warning regarding potential cancer and reproductive harm.

MIA's Description

The Mercedes-Benz Valve (123-800-00-78) is a genuine OEM part designed for specific vehicle applications.

This valve functions as a central nozzle vacuum element, connecting between the vacuum line and the electro-pneumatic system.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandGenuine
Part Number123 800 00 78
CategoryAir and Fuel

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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