Keep your diesel's exhaust-aftertreatment feedback accurate with the Walker Products NOx (Nitrogen Oxide) Sensor 1004-1030. It installs as a direct-fit replacement across a wide range of heavy-duty diesel applications, including the 2016-2024 Freightliner Cascadia [6-11.9L, 6-15.6L, L6-12.8L, L6-14.8L, L6-14.9L], 2016-2024 Freightliner 114SD [6-11.9L, L6-12.8L, L6-8.9L] and M2 112 [L6-12.8L, L6-8.9L], plus Western Star, Van Hool, Motor Coach Industries and Kimble Chassis models — see the Buyer's Guide tab for the full list.
A NOx sensor lives in the harsh, high-temperature exhaust environment and can degrade over time. Signs it may need replacing include an illuminated check engine light, stored NOx-sensor or SCR fault codes, and engine derate or limp mode. Because those signs can have other causes, diagnose the fault before replacing. If a failed NOx sensor is the cause, this unit replaces it.
Manufacturer part number 1004-1030.
This part cross-references / interchanges with the following part numbers:
What does this NOx sensor do?
It measures the concentration of nitrogen oxide in the exhaust and reports it to the engine control module, which uses the signal to help manage the SCR system's DEF dosing.
What are signs my NOx sensor may need replacing?
Common signs include a check engine light, stored NOx-sensor or SCR fault codes, and engine derate or limp mode. These can have other causes, so diagnose the fault before replacing.
Will this fit my truck?
It's cataloged for many 2016-2024 heavy-duty diesel applications from Freightliner, Western Star, Van Hool, Motor Coach Industries and others. Check the Buyer's Guide tab to confirm your exact model and engine code.
How many do I need?
The listed applications call for one per application (qty 1). Confirm your vehicle's requirement in the Buyer's Guide tab.
What is the manufacturer part number?
This is Walker Products part number 1004-1030.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
