FITMENT:
Compatible with Volvo and Mack heavy-duty trucks equipped with SCR (AdBlue/DEF) emission systems, including:

• Volvo FH series (FH12 / FH13 / FH16 / FH500 / FH540)
• Volvo FM / FMX series
• Volvo D11 / D13 / D16 engines
• Mack MP8 / MP7 engines
• Some Prevost / Renault bus applications using Volvo SCR architecture

OEM / Cross reference numbers:

• 22014032 (Volvo OEM)
• 5WK96643E / 5WK9 6643E
• 21567763 / 21069361 / 22303391 (common interchange family)

This NOx sensor is part of the SCR aftertreatment system, typically used as a downstream (outlet) sensor to measure NOx efficiency after the catalyst.

FUNCTION:

• Measures nitrogen oxide (NOx) levels in exhaust gas after SCR catalyst
• Sends real-time data to ECU via CAN communication
• Monitors SCR catalyst efficiency and AdBlue dosing performance
• Helps maintain Euro 5 / Euro 6 emissions compliance

INSTALLATION POSITION:

• Outlet (downstream) NOx sensor in SCR system
• Mounted after SCR catalyst on exhaust line

IMPORTANT NOTE:
Volvo/Mack SCR systems often use two NOx sensors (inlet + outlet).
Although part numbers look similar, correct placement is critical to avoid:

• SCR fault codes
• AdBlue dosing errors
• Engine derate / limp mode

FAQ:

Q1: Is this inlet or outlet sensor?
A1: 22014032 / 5WK96643E is typically used as the outlet (post-catalyst) NOx sensor.

Q2: What vehicles does it fit?
A2: Volvo FH/FM trucks, Volvo D11/D13/D16 engines, and Mack MP8 systems.

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

Q4: Are all 5WK96643E sensors identical?
A4: They share the same base sensor but differ in cable length and calibration depending on OEM application.

Q5: Does installation require programming?
A5: Some Volvo/Mack trucks require SCR reset or ECU adaptation after replacement.