Description
Product Overview
The iFJF Inlet Upstream NOx Sensor is a direct OEM replacement for 2013-2017 Ram 2500, 3500, 4500, and 5500 trucks equipped with the 6.7L Cummins turbo diesel engine. This sensor measures nitrogen oxide levels entering the SCR catalyst — critical data for proper DEF injection and emissions compliance.
Key Features
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Pre-Calibrated, No Programming: Install and drive — the Cummins ECU automatically recognizes and calibrates the new sensor.
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OEM-Grade Sensing Technology: Advanced ceramic planar sensing element for accurate, fast-responding NOx measurement.
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Stainless Steel Construction: Corrosion-resistant probe body and high-temp cable withstand extreme diesel exhaust conditions.
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Exact Fit: Matches OEM connector, thread size, and probe depth — no adapters or modifications needed.
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Prevents Derate: A failed NOx sensor can trigger limp mode and costly downtime. Replace it before it strands you.
Compatibility
| Brand |
Model/Part |
Years/Notes |
| Ram |
2500 6.7L Cummins |
2013-2017 |
| Ram |
3500 6.7L Cummins |
2013-2017 |
| Ram |
4500 6.7L Cummins |
2013-2017 |
| Ram |
5500 6.7L Cummins |
2013-2017 |
Technical Specifications
| Specification |
Value |
| Sensor Type |
Upstream / Inlet NOx Sensor |
| Engine |
6.7L Cummins Turbo Diesel |
| Year Range |
2013-2017 |
| Vehicle |
Ram 2500, 3500, 4500, 5500 |
| Calibration |
Factory Pre-Calibrated |
| Installation |
Plug-and-Play, No Programming |
| Includes |
Sensor + Anti-Seize Compound |
Why Choose iFJF?
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Massive Savings vs Dealer: Dealer NOx sensors cost $350-600+. Our direct replacement offers the same performance at a fraction of the price.
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Keep Your Truck Running: Avoid derate and limp mode — a working NOx sensor is essential for SCR system function.
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Same-Day US Shipping: In stock and ready to ship — no backorders, no waiting.
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1-Year Warranty: Replacement guarantee against defects.
Installation Steps
- Locate the inlet NOx sensor — typically in the exhaust downpipe before the SCR catalyst.
- Disconnect the electrical connector.
- Use a 22mm O2 sensor socket to remove the old sensor.
- Apply anti-seize to the new sensor threads (keep compound off the probe tip).
- Thread in by hand, then torque to 35-40 ft-lbs.
- Reconnect the connector until it clicks. Clear any stored codes with a scan tool.
Frequently Asked Questions
Q: Is this the upstream or downstream sensor?
A: This is the UPSTREAM (inlet) sensor — located before the SCR catalyst. It is NOT the downstream/outlet sensor. Verify your fault code identifies which sensor needs replacement.
Q: Will this clear my check engine light immediately?
A: The sensor itself won't clear stored codes. After installation, use an OBDII scanner to clear the codes. If the sensor was the root cause, the light will stay off.
Q: Do I need a dealer to install this?
A: No. Installation takes 15-30 minutes with basic tools. No programming or calibration required — the ECU handles it automatically.
Q: What if the code comes back?
A: Check for exhaust leaks near the sensor, damaged wiring, or a failing SCR catalyst. A NOx sensor code doesn't always mean a bad sensor.
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