Product Overview This air brake compressor is designed as a direct replacement for Cummins ISX15 and QSX15 engines (model years 2010–2024). It is a critical component for the air brake system in heavy duty trucks, providing consistent air pressure to support safe braking performance. Ideal for fleet operators and owner‑operators who need a reliable, heavy‑duty solution. Key Specifications – Product Type: Air Brake Compressor – Engine Compatibility: Cummins ISX15, Cummins QSX15 (2010‑2024) – Vehicle Compatibility: Freightliner Cascadia, Peterbilt 579/389, Kenworth T680/T880, Western Star – OEM Replacement Numbers: 3689649, 3689649RX, 3689649NX, 4059377, 4059378, 1832643, 1832644 – Voltage: 12V – Weight: 65 lbs (29.48 kg) – Dimensions: 17" x 15" x 10" – Warranty: 12 months Signs This Compressor Needs Replacement – Low air pressure warning on dashboard – Slow air buildup after engine start – Audible air leaks from compressor area – Oil contamination in air brake system – Brake system not holding pressure What's in the Box – 1 x Air Brake Compressor Unit Warranty & Support This air compressor comes with a 12‑month warranty against defects. If you have any questions about fitment or installation, contact us through Amazon buyer‑seller messaging. Unused, unopened products in original condition can be returned within 30 days for a full refund.