Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on OEM Ford cross-reference listings, Continental SNS737A documentation, and multiple verified aftermarket catalogs, this NOx sensor is used in Ford Euro 6 diesel SCR (AdBlue) systems, mainly on 2.0 EcoBlue Transit platform vehicles (MK8 / V362 generation).

Common system applications include:

• Ford Transit Custom 2.0 EcoBlue (Euro 6 SCR)
• Ford Transit MK8 2.0 EcoBlue diesel
• Ford Tourneo Custom 2.0 EcoBlue
• Ford Transit chassis cab / panel van EcoBlue variants (EU market)

Fitment is strictly based on OE number matching:
JK21-5L248-AG / SNS737A / A3C02859500-02 / 2462101 (related Ford EPC reference in some catalogs)

Aftermarket EPC listings confirm this sensor is part of Ford’s SNS737A NOx sensor family used on Transit EcoBlue SCR systems, with interchangeable revisions (AC/AD/AG suffix changes depending on model year and calibration).

Technical Description

This NOx sensor measures nitrogen oxide (NOx) concentration in diesel exhaust gases and sends real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 standards.

The sensor is mounted in the exhaust system (pre or post SCR depending on configuration) and operates under high temperature with integrated electronics and CAN communication.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor signal or communication faults
• P2200 / P22FB / U029D type codes (Ford-specific variations)
• Reduced engine power (limp mode)
• Increased emissions

OE / Part Numbers

• JK21-5L248-AG
• SNS737A
• A3C02859500-02 / A3C02859500-01 (revision variants)
• Ford internal reference: 2382101 (cross-listing seen in EPC catalogs)

FAQ

Is this sensor vehicle-specific?

Yes. Ford NOx sensors are ECU-matched. Even small suffix changes (AC / AD / AG) can affect calibration, connector length, or mounting position.

Why do multiple Ford part numbers exist for the same sensor?

Because Ford frequently supersedes NOx sensors across Transit EcoBlue model years while keeping the same core sensor family (SNS737A platform).

Can similar OE numbers be used instead?

Not recommended. These are ECU-calibrated emission components and must match exact OE specification to avoid SCR faults, limp mode, or incorrect NOx readings.