Air Dryer Filters

The air dryer filter, also called the air dryer cartridge or canister, removes moisture and oil from the compressed air in truck, bus and trailer air brake systems. When the desiccant is saturated, water reaches the valves, tanks and brake chambers, causing corrosion, sluggish braking and winter freeze-ups. This page groups replacement air dryer filters for the main dryer systems used on commercial vehicles.

Types and Threads

• Standard desiccant filters for general air brake applications
• Oil-coalescing filters (such as PuraGuard-type) for systems with higher oil carry-over; do not substitute a standard filter for a coalescing type
• Spin-on air dryer cartridges, most commonly with an M39x1.5 thread; some DAF applications use M41x1.5

Common References

• Bendix 5008414: air dryer filter for AD-IS and AD-SP dryers (listed with Meritor R109994 and Haldex 109994K)
• Bendix 5008414PG: oil-coalescing air dryer filter for AD-IS and AD-SP (listed with WABCO R950068A)
• Haldex 31005609: air dryer filter listed for Bendix AD-SP and AD-IS and WABCO SS1200 dryers
• WABCO 4324102227: air dryer filter listed with Scania 1932719, MAN 81521020008 and Mercedes-Benz A0004293695
• WABCO 4324100202: air dryer filter listed with Iveco 970259024, DAF 1527878, Renault 5001860088 and Volvo 20721469
• Volvo 23099526: air dryer filter for the SS1200 system

How to Choose

1. Identify the air dryer model or the old filter’s part number.
2. Check the thread size, diameter and height.
3. Confirm whether the dryer needs a standard or an oil-coalescing filter.
4. Send us this information and we will confirm the match.

Replace the air dryer filter on the manufacturer’s schedule, commonly once or twice a year depending on compressor duty and climate. OEM/ODM service is available.

Brand names and part numbers are used for identification and compatibility reference only. All trademarks belong to their respective owners. ADAOER Filter.