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K043827N00 - ZB4731 Air Processing Unit Remanufactured by Remot

Cross-references K042283N00, K066243K50, K039120N50, K048307N50, II40100F, II40100FK49

The two-part K043827N00 - ZB4731 Air Processing Unit air processing unit (APU) consists of an air dryer and a multi-circuit protection valve. In addition to adjusting pressure for the individual load circuits and providing overload protection, it will dry and clean the air that the compressor supplies. Secures the pressure of each load circuit in relation to the other load circuits and to the atmosphere. Will keep the pressure in the other circuits at the appropriate level in the event of circuit failure.


Why take a chance on low-cost products? Purchase tested and high-quality Knorr-Bremse items. All new items in our warehouse come with a 12-month warranty.


Larger quantity orders are eligible for discounts. For more information, please send an email to

Worldwide deliveries

Shipping and delivery to other countries are available. We make freight shipment simple with our FREE freight quotes.

Are you looking for spare parts only?

Visit our store to browse through the entire range. The spare parts undergo rigorous testing procedures and are available for same day dispatch from our warehouse located in Dunajska Streda / SK (EU).

Important notice regarding return of old units

You are buying a remanufactured truck part and your old unit must be returned at your own cost to our address. Any special arrangements different from that have to be agreed separately in a written form. Otherwise we have to charge an extra fee, which is not included in the standard price shown / quoted. Returned old unit(s) must be in condition according to our standard of acceptance.
If any doubts ask for clarification before placing an order:

Acknowledgement of trademarks

Unless otherwise clearly stated you are not buying a genuine new product from us. This truck part has been remanufactured according to factory standards in our workshop.

This website uses the names, models, product types, part numbers, and other product information associated with the brands of original or non-original manufacturers solely for identification purposes. We clearly emphasize that we are not distributors, dealers or in any other way associated with the mentioned manufacturers and owners of brand name(s).