Introducing the Klima BVX-3 and BVX-4 Monovalves for W126. A robust replacement option for OE Bosch Monovalves in W126 / C126 vehicles with Automatic Climate Control III. Get reliable performance year-round and restore a key component in your automatic climate control system.

Fits W126 models: 300SD 1981-85 | 300SDL 1986-87 | 300SE 1988-91 | 300SEL 1988-91 | 350SD 1991-91 | 350SDL 1990-91 | 380SE 1984-85 | 380SEC 1982-83 | 380SEL 1981-83 | 420SEL 1986-91 | 500SEC 1984-85 | 500SEL 1984-85 | 560SEC 1986-91 | 560SEL 1986-91 | and others with 4 hose barb housing for heated windshield washer system calling for OE #000 830 3784.

Also available: 3 hose barb housing for vehicles w/o heated windshield washer system calling for OE# 000 830 1884.

Bosch monovalves and monovalve repair kits are now no longer available new. Many aftermarket rebuild kits are notorious for poor quality. Even after rebuilding, the OE Bosch monovalves tend to operate poorly at high RPMs and are prone to sticking. Klima Design Works BV/X Series valves are a new and superior replacement heater control valve system that uses technology from late model vehicles.

Download the BV/X Series Compatibility Info Sheet (PDF)

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