The Bendix AD-IS Air Dryer, part number K137021 (also cataloged as BWK137021), is a direct-fit air dryer designed for heavy-duty truck air brake systems. The AD-IS designation identifies this as an integrated-style dryer that combines desiccant drying with purge valve and safety valve functions in a single unit. Cross-references include 109495, 109871N, 5004049, 5004052, 5008414PG, 5009233, K031562, and K052469, making it a widely applicable replacement across multiple OEM and aftermarket listings. Sold individually by Pro Gear and Transmission. Call us to confirm proper fit for your application.
A factory handling fee of $20.00 per unit is added at checkout.
Features
Bendix AD-IS integrated air dryer design
Part number K137021, also listed as BWK137021
Cross-references: 109495, 109871N, 5004049, 5004052, 5008414PG, 5009233, K031562, K052469
Designed for heavy-duty truck air brake systems
Sold as individual unit (each)
