Bayonet Paccar & Cummins| DEF Sensor | Q21-6170-001
High-quality aftermarket DEF sensor—brand new, no core required. Direct replacement for OEM #Q21-6170-001. Built to OEM specs for reliable SCR performance and long-lasting durability.
DEF Sensor | Q21-6170-001
Restore accurate DEF system function with this high-quality aftermarket DEF sensor, built as a direct-fit replacement for OEM part number Q21-6170-001. Designed for heavy-duty diesel applications, this sensor delivers precise DEF fluid level and temperature readings to maintain proper SCR system performance and keep your vehicle emissions-compliant.
Constructed from durable, corrosion-resistant materials, it’s engineered to withstand harsh environments, extreme temperatures, and exposure to urea-based DEF fluid. This unit is brand new, requires no core return, and installs easily with an OEM-style plug-and-play design, minimizing downtime and labor costs.
Whether you're a fleet manager, diesel technician, or owner-operator, this Q21-6170-001 replacement sensor is a cost-effective alternative to expensive dealer parts—offering OEM-level performance and long-term reliability. It’s the ideal choice for preventative maintenance or urgent system repairs.
Backed by a manufacturer warranty and supported with fast shipping, this DEF sensor helps you stay ahead of DTC codes, performance drops, or SCR failures.
Order now to restore proper DEF monitoring and ensure your emissions system is operating at peak efficiency—only from American Radiator.
DEF Header Features:
Designed For:
Manufacturer Warranty
DuraWRX provides a manufacturer's warranty on its DEF-related products for up to 2 years/40,000 miles/1,200 hours (whichever occurs first). This warranty covers any defects in materials or workmanship. To be eligible for a claim, the end user must register their product purchase on the DuraWRX site. To file a claim, customers must contact DuraWRX to receive a return shipping label. Once the product is returned and the claim is approved, DuraWRX will issue either a refund or a credit.
Please confirm your OEM or Aftermarket number matches before ordering.
Q21-6039
Q21-6090
Q21-6127-001
Q21-6127-001K1T
Q21-6167-001
Q21-6167-001KIT
Q21-6170-001
Q21-6170-001K1T
Q21-6170-001KIT
Q216167-001
Shipping & Returns
Why Buy From American Radiator?
Trust American Radiator, your reliable source for quality cooling solutions since 2001. With roots in the industry dating back to the 1970s, our team brings decades of experience delivering high-performance radiators, charge air coolers, and DPF systems at competitive prices.
We work directly with trusted domestic and international manufacturers that supply OEM-grade components, ensuring every product meets or exceeds original equipment standards. Whether you need a heavy-duty truck radiator or a replacement for your DEF Sensor, we’re committed to providing durable, cost-effective solutions that perform.
Have questions? Contact our experienced inside sales team at 888-483-5763 for expert guidance and fast, friendly support.
| Part Number | SKU | 280003 |
|---|---|
| OEM | Aftermarket Numbers | Q21-6039 Q21-6090 Q21-6127-001 Q21-6127-001K1T Q21-6167-001 Q21-6167-001KIT Q21-6170-001 Q21-6170-001K1T Q21-6170-001KIT Q216167-001 ASP60DS21-FG ASP60DS21FG |