Description
Product Overview
Replace your failed NOx sensor with this premium aftermarket 5WK97339A Nitrogen Oxide (NOx) Sensor, precision-engineered for Detroit Diesel DD13, DD15, DD16 (2014-2021), Freightliner Cascadia (2014-2021) equipped with the Detroit Diesel DD13/DD15/DD16 engine. This sensor delivers OE-comparable accuracy and response time at a fraction of dealership prices.
Key Features
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Direct Plug-and-Play Replacement — No programming or calibration required. Uses the same 5-pin connector and thread pitch as the OEM sensor.
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Precision Sensing Element — Multi-layer ceramic sensing element provides accurate NOx concentration readings (±10 ppm accuracy) across the full operating temperature range.
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OEM-Grade Construction — High-temperature stainless steel housing with sealed electronics cavity protects against moisture, vibration, and thermal shock.
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Pre-Calibrated & Tested — Each sensor undergoes 100% functional testing before shipping, ensuring out-of-box readiness.
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1-Year Warranty — Backed by our comprehensive warranty against manufacturing defects.
Compatibility & Fitment
This 5WK97339A NOx sensor is compatible with the following applications:
| Vehicle/Engine |
Year Range |
Engine |
| Detroit Diesel DD13, DD15, DD16 (2014-2021), Freightliner Cascadia |
2014-2021 |
Detroit Diesel DD13/DD15/DD16 |
Technical Specifications
| Specification |
Value |
| Part Number |
5WK97339A |
| OE Reference Numbers |
A0101532228, 0101532228, A 010 153 22 28, 5WK97338A |
| Sensor Type |
Nitrogen Oxide (NOx) — Inlet (Upstream) NOx Sensor |
| Connector Type |
5-pin |
| Thread Size |
M20 x 1.5 (Standard NOx Sensor Thread) |
| Operating Voltage |
12V / 24V DC |
| Measurement Range |
0-3000 ppm NOx |
| Brand |
iFJF |
Why Choose iFJF NOx Sensors?
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Save 50-70% vs. Dealer Pricing — Get OE-quality performance without the OE markup. Most dealer NOx sensors cost $400-$800+; ours deliver the same function at a fraction of the cost.
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Fleet-Tested Reliability — Our sensors are trusted by independent repair shops and fleet operators across North America for daily-use diesel vehicles.
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Fast Shipping from US Stock — Orders ship within 1 business day. No 2-4 week backorder delays common with dealer parts.
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No Core Charge — Unlike dealer replacement programs, there's no core deposit or return requirement.
Installation Tips
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Safety First: Allow exhaust system to cool completely before beginning (NOx sensors reach 600°C+ during operation).
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Locate the Sensor: Find the sensor on the exhaust pipe near the SCR catalyst. Refer to vehicle service manual for exact location.
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Unplug & Remove: Disconnect the electrical connector, then use a 22mm or 7/8" oxygen sensor socket to unscrew the old sensor.
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Install New Sensor: Thread the new sensor by hand first to avoid cross-threading. Torque to 35-45 Nm (26-33 ft-lbs). Anti-seize is pre-applied on threads.
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Connect & Clear Codes: Plug in the electrical connector until it clicks. Use OBD-II scanner to clear any stored NOx-related fault codes.
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Test Drive: Complete 1-2 drive cycles for the ECU to complete sensor readiness monitors.
Frequently Asked Questions
Q: What is a NOx sensor and why does it fail?
A: A NOx (Nitrogen Oxide) sensor monitors the nitrogen oxide levels in your diesel engine's exhaust system, feeding data to the ECU for SCR/DPF regeneration. Common failure causes include soot contamination, thermal cycling fatigue, and sensor element degradation over 100,000+ miles. Symptoms of failure include Check Engine Light (CEL), poor fuel economy, failed emissions test, and derate mode.
Q: Is this 5WK97339A NOx sensor a direct plug-and-play replacement?
A: Yes. This NOx sensor is designed as a direct OE replacement for 5WK97339A. It uses the same 5-pin connector and mounting thread as the OEM unit. No programming or calibration required — simply unplug the old sensor, install the new one, and clear any stored diagnostic codes. Always verify fitment with your vehicle's VIN before purchase.
Q: Will this fit my Detroit Diesel DD13, DD15, DD16 (2014-20?
A: This NOx sensor fits Detroit Diesel DD13, DD15, DD16 (2014-2021), Freightliner Cascadia with the Detroit Diesel DD13/DD15/DD16 engine. It replaces OE part numbers: A0101532228, 0101532228, A 010 153 22 28, 5WK97338A. Please cross-reference your existing sensor part number before ordering. If your OEM part number is listed above, this is a guaranteed direct fit.
Q: What's the difference between upstream and downstream NOx sensors?
A: Upstream (inlet) NOx sensors measure pre-SCR emissions to help the ECU calculate DEF dosing. Downstream (outlet) NOx sensors measure post-SCR emissions to verify the SCR catalyst is working correctly. This is the Inlet (Upstream) NOx Sensor sensor. Installing the wrong position sensor will trigger diagnostic codes. Check your vehicle's service manual for the correct position.
Q: How do I know if my NOx sensor is bad?
A: Common symptoms include: (1) Check Engine Light with P2200-P2214 or P229E-P22A2 codes, (2) Decreased fuel economy (ECU defaults to rich mixture), (3) Failed emissions inspection, (4) Engine derate / limp mode, (5) Excessive DEF consumption, (6) Rough idle or hesitation. Use an OBD-II scanner to read specific NOx-related codes.
Q: Do I need to reset the ECU after installation?
A: After installing the new 5WK97339A NOx sensor, use an OBD-II scanner to clear any stored fault codes. The ECU will automatically recognize the new sensor and begin monitoring within 1-2 drive cycles. If codes persist, double-check the electrical connector is fully seated and there are no exhaust leaks near the sensor bung.
Q: How long do aftermarket NOx sensors last?
A: Our NOx sensors are manufactured to strict quality standards with premium sensing elements. Expected service life is 80,000-120,000 miles under normal operating conditions. Factors affecting lifespan include fuel quality, engine maintenance, and operating environment. We offer a 1-year warranty against manufacturing defects.
Q: What's included in the box?
A: Each order includes one (1) 5WK97339A NOx Nitrogen Oxide Sensor with pre-installed O-ring gasket, anti-seize compound on threads, and protective cap. The sensor is individually tested and calibrated before shipping. Install tool not included.
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