FITMENT:
Compatible with Cummins diesel engines used in medium-duty trucks and buses, including:

• Freightliner M2 106
• Thomas Built / school bus chassis
• Freightliner T370
• Other Cummins ISB / ISL SCR-equipped vehicles (EPA10 / EPA13 systems)

OEM reference numbers:

• 4327153
• 5WK96760A
• Related interchange: 2872948 / 4326872 family (depending on SCR layout and revision)

Used in SCR (AdBlue/DEF) emission systems for NOx monitoring and catalyst control. Cummins NOx sensors are “smart sensors” communicating via CAN/J1939 with the engine ECM.

FUNCTION:

• Measures nitrogen oxide (NOx) levels in exhaust gas stream
• Sends real-time data to ECM for SCR dosing control
• Optimizes AdBlue injection for emissions compliance
• Prevents engine derate and SCR efficiency faults

INSTALLATION POSITION:

• SCR system inlet or outlet (depends on OEM calibration)
• Typically mounted between DPF outlet and SCR catalyst or downstream of SCR unit

FAQ:

Q1: Is this inlet or outlet sensor?
A1: It can be either inlet or outlet depending on the truck’s SCR configuration. Cummins systems assign function by ECU calibration, not only by part number.

Q2: What vehicles does it fit?
A2: Common in Freightliner M2 106, T370, and other medium-duty trucks using Cummins EPA10/EPA13 engines.

Q3: What are failure symptoms?
A3: SCR warning light, engine derate, incorrect NOx readings, AdBlue system faults, or limp mode.

Q4: Is 4327153 interchangeable with 5WK96760A?
A4: Yes, 5WK96760A is a widely used OE aftermarket reference for Cummins 4327153.

Q5: Does installation require programming?
A5: Some vehicles require ECM reset or SCR adaptation after installation.