Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Bendix · Brakes & Wheel End
K033233
In stock · ships from Knoxville
The Bendix K033233 is an SR-4™ spring brake modulating valve, primarily used on trailers to control the parking and emergency brake functions of the spring brakes.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Designed for trailer axle spring brake control. Typically mounts directly on a trailer air reservoir. Exact vehicle year/make/model fitment should be verified by matching to the existing valve's port configuration and mounting style.
Part data verified against 4 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It replaces older or obsolete spring brake control valves and includes an internal anti-compound feature that prevents the simultaneous application of the service and parking brakes, protecting the system from damage. You would replace this valve if your trailer's parking brakes are failing to apply or release correctly, or if the valve is corroded and leaking air.
Part Number: K033233
BENDIX 4 SPRING BRAKE
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end