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

Based on Mopar OEM catalog data and verified SCR system listings, part number 68146138AC (replaced by 68249511AB) is a NOx sensor used in FCA diesel SCR (AdBlue) systems, mainly on 3.0L EcoDiesel V6 platforms.

Confirmed applications include:

• Jeep Grand Cherokee (WK2) 3.0L EcoDiesel (2014–2019)
• RAM 1500 EcoDiesel 3.0L V6 (2014–2019)
• Chrysler / Jeep / RAM FCA 3.0L diesel SCR system vehicles

Fitment is strictly based on OE number matching:
68146138AC / 68249511AB / Bosch 0281006343

Verified Cross-Reference (Important)

• Mopar OEM catalog confirms 68146138AC = NOx sensor for Jeep Grand Cherokee 3.0L diesel SCR system (moparpartsgiant.com)
• Part is officially superseded by 68249511AB in FCA systems (factorychryslerparts.com)
• Bosch reference 0281006343 confirms it is part of FCA diesel SCR NOx sensing system architecture (ebay.com)

📌 Key point:
This is a rear SCR NOx sensor for the FCA 3.0L EcoDiesel system, and it is ECU-calibrated (inlet/outlet sensors are NOT interchangeable).

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 used on FCA EcoDiesel engines, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 5/Euro 6 standards depending on model year.

The Bosch 0281006343 sensor is typically used as the downstream (post-SCR) NOx monitoring sensor, verifying catalyst efficiency and emissions compliance.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor communication or signal faults
• P2200 / P229F / U029E type codes (FCA-specific variants possible)
• Reduced engine power (limp mode)
• Increased AdBlue consumption or incorrect dosing

OE / Part Numbers

• 68146138AC
• 68249511AB (superseded replacement)
• Bosch 0281006343
• FCA 3.0L EcoDiesel SCR NOx sensor family

FAQ

Is this sensor interchangeable with other FCA NOx sensors?

No. FCA uses separate calibration for inlet and outlet NOx sensors. Even if they look identical, they are not interchangeable.

Why is it used in Jeep and RAM vehicles?

Because both use the same FCA 3.0L EcoDiesel V6 diesel SCR architecture, so emission components are shared.

Do aftermarket sensors work well?

Mixed results. Many users report aftermarket NOx sensors fail early or cause drift issues, and OEM Bosch/Mopar versions are significantly more reliable.