Description
The Kenworth/Peterbilt Q21-1041 is a 150 PSI air pressure sensor used as the primary air system pressure transducer on Class 7 and 8 Paccar trucks, with a three-pin circular connector and 2.64 in overall length. PAI 730397 is the aftermarket equivalent and crosses directly to Mack 745-5005758, Navistar 2505669C91, and Peterbilt 17109AM, providing the air pressure feedback the dash gauge and ECM use to monitor brake system reservoir pressure.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 730397 (Kenworth/Peterbilt Q21-1041) |
| Part Type | Air Pressure Sensor / Transducer |
| Pressure Range | 0–150 PSI |
| Connector | 3-pin circular |
| Overall Length | 2.64 in |
| Color/Finish | Black / silver body |
Cross References
This part replaces or is equivalent to the following part numbers:
- Kenworth: Q21-1041
- Peterbilt: Q21-1041, 17109AM
- Mack: 745-5005758, 745-5008677, 4333-2505669C91
- Navistar / International: 2505669, 2505669C91
- PAI Industries: 730397
Applications
This air pressure sensor is a multi-application part used as the primary air system transducer on:
- Kenworth T660, T680, T800, T880, W900 (multiple model years)
- Peterbilt 379, 386, 389, 567, 579 (multiple model years)
- Mack CH, CHU, CXU, Granite, Pinnacle, MRU (multiple model years)
- International ProStar, LoneStar, 9200, 9400 (multiple model years)
Verify connector style and thread on your existing sensor before ordering. Some chassis use a separate dual-gauge dash sensor — confirm by part number rather than position.
