Description
Overview:
New DuraWRX ASP61DS21-FG DEF level sensor for 21 and 31 gallon diesel exhaust fluid tanks with a 54 mm bayonet mount on 2015-2022 Kenworth and Peterbilt trucks with Paccar MX-11, MX-13, PX-7 and PX-9 and Cummins ISX12 / X12 and ISX15 / X15 engines. Replaces Paccar Q21-6170-002 and the earlier Paccar numbers for this sensor.
Specifications:
- Part number: DuraWRX ASP61DS21-FG
- Replaces: Paccar Q21-6170-002, Q21-6167-002, Q21-6127-002, Q21-6091
- Brand: DuraWRX
- Condition: New Aftermarket
- Component type: DEF level sensor (bayonet mount)
- Tank size: 21 gallon or 21 / 31 gallon
- Tank interface: 54 mm bayonet
- Sensor height: 21 in
- Level sensor: Digital (CAN bus)
- Electrical connector: AMP 1-1703818-1
- Integrated vent: Yes
- Operating voltage: 9-32 VDC
- Engines: Paccar MX-11, MX-13, PX-7, PX-9; Cummins ISX12 / X12, ISX15 / X15
- Country of origin: USA
Compatibility / Fitment:
Fits 21 and 31 gallon DEF tanks originally fitted with Paccar sensor Q21-6170-002, Q21-6167-002, Q21-6127-002, Q21-6091:
| Make | Model | Years | Engine | DEF Tank |
|---|---|---|---|---|
| Kenworth | T270 | 2018-2021 | PX-7 | 21 Gallon |
| Kenworth | T370 | 2017-2021 | PX-7, PX-9 | 21 Gallon |
| Kenworth | T440 | 2017-2020 | P-9, PX-9 | 21 Gallon |
| Kenworth | T470 | 2017-2020 | P-9, PX-9 | 21 Gallon |
| Kenworth | T680 | 2015-2022 | X15, MX-13, MX-11 | 21 Gallon |
| Kenworth | T800 | 2017-2019 | X15, MX-13, MX-11 | 21 / 31 Gallon |
| Kenworth | T880 | 2015-2022 | X15, MX-13, MX-11 | 21 / 31 Gallon |
| Kenworth | W900 | 2016-2021 | X15, MX-13, X12 | 21 / 31 Gallon |
| Kenworth | W990 | 2018-2021 | X15, MX-13 | 21 / 31 Gallon |
| Peterbilt | 330 | 2017-2020 | PX-7 | 21 Gallon |
| Peterbilt | 337 | 2017-2020 | PX-7, PX-9 | 21 Gallon |
| Peterbilt | 348 | 2017-2020 | PX-7, PX-9 | 21 Gallon |
| Peterbilt | 365 | 2017-2020 | ISX12, X12, PX-9, MX-11 | 21 Gallon |
| Peterbilt | 367 | 2017-2020 | MX-13, ISX12, ISX15, X15, X12 | 21 / 31 Gallon |
| Peterbilt | 389 | 2017-2022 | ISX15, X15, MX-13 | 21 / 31 Gallon |
| Peterbilt | 567 | 2016-2022 | MX-11, PX-9, MX-13, ISX12, ISX15, X12, X15 | 21 / 31 Gallon |
| Peterbilt | 579 | 2016-2022 | MX-11, ISX15, X15, MX-13 | 21 / 31 Gallon |
Two hard fitment gates apply:
Match the Paccar number and tank size. Kenworth and Peterbilt use three DuraWRX bayonet sensors sized to the DEF tank. This one fits 21-gallon tanks and the 21 / 31-gallon tanks listed above. The 11-gallon version, and the version for Kenworth T680 21 / 31-gallon and Peterbilt 587 31-gallon tanks, are different, and we also stock them. Check the Paccar number on your old sensor and your tank size before ordering.
54 mm bayonet mount. This sensor locks into the tank with a 54 mm bayonet mount, as used on Kenworth and Peterbilt DEF tanks.
Other versions available: DuraWRX bayonet sensors for 11-gallon tanks and for Kenworth T680 and Peterbilt 587 21 / 31-gallon tanks.
Common interchanges: Paccar Q21-6170-002 / Q21-6167-002 / Q21-6127-002 / Q21-6091.
The DuraWRX ASP61DS21-FG is a new bayonet-mount DEF level sensor for 21 and 31 gallon tanks on Kenworth and Peterbilt trucks. It replaces Paccar Q21-6170-002. Confirm the tank size and the number on your old sensor before ordering.







