Air Pressure Sensor | 0-85 psig | Kenworth / Peterbilt Multiple use application Multiple Engine Application Direct replacement for OE sensor part number Q21-1040 Precise construction ensuring proper fit, quality electronic design ensuring sensor longevity. Quality You Can Trust - HDKits has established themselves as the leading supplier of aftermarket heavy duty diesel parts, with quality standards that always meet or exceed OE standards DETAIL - HDKits sensors meet or exceed the OEM specifications. High resolution detail design. After production, the sensors are individually tested ensuring exact fitment and reducing out of box failures.