Zirconia Ceramic Auto NOx Sensor 4326873 7099783C1 7099784C1 68447681AA ODM

The 5WK96742A is a planar dual-cell limiting current type nitrogen oxide (NOx) sensor designed for diesel engine exhaust aftertreatment systems equipped with Selective Catalytic Reduction (SCR). It is an electrochemical sensor that continuously measures the concentration of nitrogen oxides (NOx) and oxygen (O₂) in the exhaust stream and communicates with the Engine Control Unit via digital CAN bus protocol (typically SAE J1939). This real-time feedback enables precise control of the SCR system and ensures compliance with EPA 2010, Euro V, China V/VI, and equivalent emission standards.

The sensor consists of a zirconia-based ceramic sensing element and an integrated electronic control unit, forming a single unit installed directly in the exhaust gas system. This sensor is commonly referred to as a Gen2.8 or CES (Controlled Emission System) sensor in various applications. The design incorporates advanced HTCC (High-Temperature Co-fired Ceramic) technology for enhanced durability and measurement accuracy.

The NOx sensor transmits the NOx value in the exhaust gas to the ECU in real time after normal operation. The ECU monitors whether the NOx value in the exhaust gas exceeds the standard through a set of nitrogen oxide monitoring programs.

Most engines equipped with SCR aftertreatment systems utilize two NOx sensors:

• Upstream (pre-SCR) – installed before the SCR catalyst, providing real-time feedback to precisely meter Diesel Exhaust Fluid (DEF) injection

• Downstream (post-SCR / System Outlet) – installed after the SCR catalyst, used mainly to confirm that legislated emissions limits have not been exceeded

Important: This sensor is commonly used as a System Outlet (downstream) sensor in many applications. Always verify the correct placement position (upstream vs. downstream) on your specific vehicle before ordering.

The following part numbers are directly interchangeable with 5WK96742A. When searching for a replacement, these numbers may appear on the original sensor label, in supplier catalogs, or in vehicle manufacturer documentation. Always verify physical connector type, voltage rating, and thread size before purchasing.

From multiple supplier sources, the following cross-references have been verified:

• The sensor is known to replace OE numbers SNS742A, 5WK96742A, 4326873, and 5295473

• For Dodge Ram applications, it cross-references to 904-6011, 904-6030, 68210084AA, 5WK96742B with vehicle fitment for model years 2013-2018

• The sensor is listed as direct replacement for 2872948, 4326873, A034M378, and 5WK96742

• A parts specialist website confirms that 5WK96742 A034M378 2872948 NB1500 SNS142 are all compatible variants

• The 4326873 series (including 4326873RX) is a genuine OEM part for heavy-duty diesel applications

• Gaoxin Green Technology offers a comparable sensor maintaining full compatibility with CONTINENTAL GEN3.5 specifications

⚠️ Important: Different suffixes (5WK96742 vs. 5WK96742A vs. 5WK96742B) may indicate minor production revisions or calibration differences. Match the full alphanumeric string on your original sensor whenever possible. The underlying Continental reference number is the most reliable way to ensure correct functionality. If in doubt about compatibility, refer to your original sensor's part number before purchasing.

The 5WK96742A NOx sensor is designed for diesel engines and is primarily used with Cummins diesel engines in pickup trucks, medium-duty trucks, and commercial vehicle applications. Application coverage spans EPA 2010, Euro V, and China V/VI compliant vehicles.

This sensor is most closely associated with Cummins 6.7L diesel engines in pickup truck and commercial vehicle applications. It is commonly used with Cummins engines equipped with SCR aftertreatment systems.

The 5WK96742A NOx sensor is widely used in commercial vehicles powered by Cummins diesel engines:

The 5WK96742A and its variants can be used in both upstream and downstream positions depending on the specific vehicle platform. Confirm which position requires replacement on your vehicle:

• System Outlet (Downstream / Turbo Outlet) – The 4326873 variant is specifically labeled for placement on the turbocharger outlet pipe

• Upstream (Inlet) – Some variants (e.g., 5WK96742B) are marketed as upstream sensors for Dodge Ram applications

• For ISB engines, the sensor may be referred to as an Inlet sensor (pre-SCR)

The 5WK96742A is designed for vehicles meeting:

• EPA 2010 – North American heavy-duty emissions standards (primary application)

• EPA 2013 – ISB6.7 certified to US EPA 2013 standards

• Euro V – European emissions standards

• China V / China VI – Asian market requirements

• Equivalent Tier standards for on-road and off-highway equipment

The sensor meets EPA and EU emissions standards, ensuring legal operation across regulated markets.

Due to the diversity of vehicle configurations, physical fitment alone does not guarantee proper function. To confirm compatibility:

1. Check your original sensor label – Match the full part number 5WK96742A or confirmed cross-references (4326873, 2872948, SNS142, etc.)

2. Verify voltage – The sensor is 12V/24V compatible; confirm your vehicle electrical system voltage

3. Count connector pins – 4-pin sealed connector type

4. Confirm thread size – M20 x 1.5

5. Verify placement position – Confirm upstream (inlet) vs. downstream (outlet) position

6. Check engine platform – Confirm compatibility with Cummins 6.7L, ISB, ISC, ISL, or ISX platforms

7. Verify vehicle model year – Dodge Ram compatibility is for model years 2013–2018

⚠️ Important note: Compatibility extends beyond physical fitment. The sensor must match the ECU's CAN communication protocol. Always reference your original sensor's part number or consult vehicle-specific documentation before purchasing.

A degraded or failed 5WK96742A NOx sensor will typically trigger one or more of the following symptoms. Early recognition can prevent secondary damage to the SCR catalyst, DEF injector, Diesel Exhaust Fluid system, or Diesel Particulate Filter (DPF).

The most common first indicator is the illumination of the check engine light on your dashboard. The ECU detects abnormal, missing, or out-of-range NOx data and triggers a fault code. A faulty NOx sensor often illuminates the vehicle's check engine light.

Common causes of failure include soot buildup on the sensor, water intrusion, and/or cable damage, which will cause the check engine light to come on.

If you have performed an on-board computer scan after seeing the check engine light and your vehicle is showing any of the following error codes, it typically means the NOX sensor has failed:

The rationality check for this sensor consists of sensor stuck low and stuck high checks performed whenever the engine operates under highly transient conditions. A fault condition is reached whenever the NOx sensor values are below or above a fault limit.

When NOx readings become inconsistent or implausible, the ECU reacts to protect emissions systems by limiting torque and engine speed. Vehicle owners may experience reduced engine power, sluggish acceleration, and overall poor vehicle performance. A failing sensor can negatively affect your vehicle’s performance and fuel efficiency.

A malfunctioning NOx sensor sends inaccurate data to the ECU, which in turn adjusts the air-fuel mixture incorrectly. This imbalance often causes the engine to inject more fuel than necessary, leading to increased fuel consumption. Look out for warning signs such as increased fuel consumption along with other symptoms.

A faulty NOx sensor disrupts the ECU and SCR, triggering fault codes and leading to incorrect DEF dosing. False high NOx readings cause the SCR to over-dose DEF, resulting in rapid DEF depletion and potential crystallized injector. This is one of the most costly indirect symptoms of a failing NOx sensor.

Since the NOx sensor directly impacts your vehicle's emissions, a failure can cause your vehicle to exceed acceptable limits, resulting in a failed test. Failing to maintain a healthy NOx sensor can result in non-compliance, potentially leading to fines and penalties.

It is always recommended to fix NOx sensor issues as soon as possible to avoid any damages to the DPF filter. Otherwise, diesel particulate matter or soot can clog the filter, potentially costing thousands to repair.

When the NOx sensor is unable to maintain a reliable output, its signal quality will be set to “not reliable." This OBD monitor is designed to detect bad sensor quality. Too long a duration of not reliable sensor signal quality is considered an error.

Before replacing the 5WK96742A, perform these basic checks:

1. Visual inspection – Look for damaged cable insulation, chafing against chassis components, bent pins, or a melted/cracked connector

2. Check DTC status – Using a diagnostic scan tool, verify which codes are present and whether they are active or intermittent

3. Heater resistance test – Measure between heater positive and heater ground pins using a multimeter. An open circuit or short indicates internal failure

4. Voltage supply – With key on and engine off, verify proper voltage at the sensor connector

5. Live data review – Observe NOx readings; a fixed reading of 0 ppm or pegged at maximum without change points strongly suggests a faulty sensor

Note: A recurring NOx sensor code may also be caused by an exhaust leak upstream of the sensor, poor DEF quality, a failed DEF injector, or a contaminated SCR catalyst. Perform a thorough system diagnosis before sensor replacement to avoid repeat failures.

Purchasing the correct 5WK96742A NOx sensor and installing it properly is essential for reliable SCR performance and avoiding costly mistakes. Diesel vehicle owners should pay special attention to part number matching, voltage compatibility, placement position, and installation procedures.

• Match the full printed number on your original sensor – 5WK96742A or confirmed cross-references (5WK96742, 5WK96742B, 2872948, 4326873, SNS142, A034M378, NB1500, 904-6011, 904-6030, 68210084AA, etc.)

• Check suffix variations – Different suffixes (5WK96742 vs. 5WK96742A vs. 5WK96742B) may indicate minor production revisions or calibration differences. Do not rely solely on partial number matches.

• Avoid “universal fit" listings – This is a specific digital device; generic sensors claiming to fit “all diesels" are unlikely to communicate correctly with your ECU

• Continental CES Gen2.8 technology – Some replacement sensors feature Generation 2.8 technology with software re-flashing capability to ensure future compatibility

• If in doubt about compatibility, refer to your original sensor's part number or consult a specialist before purchasing

• Verify the number of wires – Some sensors are manufactured with 8 wires; confirm the correct wiring count for your specific application

• Reputable supplier – Choose a supplier with documented quality control (IATF 16949, ISO 14001, or TS16949 certification) and a minimum 6–12 month warranty

• Avoid used or “remanufactured" – NOx sensors degrade internally from heat and contamination. Used sensors almost always fail prematurely

• Price guideline – Authentic quality replacements typically range from approximately $90 to $250

• Packaging – New sensors should be shipped in protective packaging with a protective cap over the ceramic tip

• Certification – Look for suppliers with IATF16949 and ISO14001 certification

• After-sales service – Some suppliers offer one-for-one compensation in case of manufacturing defects

• Do not touch the ceramic sensing tip – Skin oils cause thermal shock cracking during the first heat-up cycle

• Inspect cable routing – Ensure the new cable follows the original path, using existing clips and standoffs. Avoid sharp bends or contact with moving parts

• Remove protective cap only when ready – Keep the sensor clean by removing the protective cap immediately before installation

• Clean the bung threads – Use a thread chaser (M20 x 1.5) to remove carbon buildup and rust before installation

• Inspect electrical connections – Check the vehicle-side connector for cleanliness, corrosion, and sealing integrity before installing the new sensor

• Re-use the old bracket – The replacement sensor may not include a mounting bracket, so re-use your old bracket that holds the control box to the engine block

Follow this sequence for proper installation:

1. Prepare the mounting location – Allow the exhaust system to cool before removal. Wear heat-resistant gloves and eye protection

2. Remove the old sensor – Carefully remove the faulty sensor from the exhaust bung

3. Inspect the vehicle connector – Ensure the mating connector is dry, clean, and free from corrosion

4. Remove protective cap – Immediately before installation, remove the protective cover from the sensor probe

5. Install the probe – Insert the sensor probe into the exhaust bung. Hand-tighten while holding the sensor body to prevent cable twisting

6. Torque properly – Recommended torque for M20 x 1.5 threads: 40–60 Nm (use a torque wrench)

7. Connect the harness – Connect the mating connector to the sensor. Ensure the connector interior is clean and dry. Lock the connector securely in place

8. Secure the cable – Use original routing clips and standoffs to secure the harness away from heat sources and moving parts

9. Re-use the old bracket – Mount the sensor’s electronic control unit to the engine block using your old bracket

A new NOx sensor will NOT function correctly until the ECU learns its baseline values and performs a plausibility check. Many returns are caused by skipped adaptation, not a defective part.

Why adaptation is necessary: Engine Control Units continuously learn and adapt to sensor degradation over time. Installing a fresh component without resetting these learned values leaves your ECU operating on outdated, skewed data.

What DOES NOT work: Attempting to clear deep-level adaptation memory by disconnecting the battery is ineffective on modern emissions systems.

Recommended procedure:

1. Install the sensor following the sequence above

2. Connect a professional diagnostic scan tool capable of OBD-II / SAE J1939 diagnostics

3. Clear all existing DTCs – Use the diagnostic tool to clear all existing fault codes

4. Perform “NOx sensor reset / adaptation / teach-in" – This function is typically found under “Special functions," “SCR system," or “Aftertreatment service" in diagnostic software

5. Reset SCR learned values (if available) – This clears previously stored efficiency values from the old sensor

6. Drive cycle – Complete a 15–20 minute mixed driving cycle at operating temperature with varying engine loads

7. Verify readiness – After the drive cycle, check for any returning DTCs. Monitor live NOx data; it should fluctuate logically

Without proper adaptation, you may still see DTCs (e.g., P2202, P229E) even with a brand new sensor. Many returns are caused by skipped adaptation, not a defective part. Error cleaning may be required after fitting a new NOx sensor, but just once after installation.

• Pickup truck applications (Dodge Ram 2500/3500/4500/5500) – Verify your vehicle model year (2013–2018) and engine (6.7L Cummins diesel) before purchase. This sensor is specifically designed for these applications.

• School bus applications (Blue Bird, IC Corporation) – Compatible with Cummins-powered buses; verify placement (inlet/outlet) based on original sensor.

• Medium-duty truck applications (Freightliner, International) – Verify engine platform (ISB, ISC, ISL, ISX) and placement position.

• Wiring harness condition – Vehicles operate in harsh environments (vibration, heat, moisture, road salt). Inspect the full harness length for chafing, corrosion at connectors, and damaged insulation before condemning the sensor

• SCR system health – A recurring NOx sensor code may indicate a failed SCR catalyst, DEF quality issues, or a clogged DEF injector. These should be diagnosed before replacing the sensor a second time

• Multiple sensor positions – Some platforms use two NOx sensors (upstream and downstream). Verify which position requires replacement.

• ECU software updates – In some cases, a recurring NOx sensor issue may be addressed by an ECU software update rather than repeated sensor replacement

• Dealer vs. aftermarket pricing – Dealerships may charge significantly more for replacement ($1000 quoted vs. $150–300 for aftermarket)

• In regions with mandatory emissions testing, a non-functioning NOx sensor will cause the MIL to illuminate, resulting in automatic inspection failure

• It is illegal to defeat, delete, or simulate the NOx sensor signal in any on-road vehicle. Always replace with a fully functional sensor

• The sensor is designed to detect NOx levels in diesel-fueled vehicles that must comply with state and federal emissions regulations

• The sensor is designed to optimize emissions and fuel economy to meet national and regional emission standards

• Before purchasing, confirm the supplier offers a return or exchange for compatibility errors, preferably within 30 days of receipt

• Keep your original sensor until the new one is confirmed working – it serves as the ultimate reference for part number and fitment

• Request a data sheet or installation guide that includes pinout and adaptation steps if available

• Most reputable suppliers offer a 6–12 month warranty against manufacturing defects. Some offer 12-month/unlimited mileage coverage

The NOx Sensor 5WK96742A is a critical emissions aftertreatment component for diesel vehicles equipped with SCR systems, primarily used with Cummins 6.7L engines in Dodge Ram pickup trucks (2013–2018), Freightliner trucks, Blue Bird school buses, International vehicles, and other commercial applications.

Key cross-references: 5WK96742, 5WK96742B, 2872948, 4326873, SNS142, SNS742A, A034M378, NB1500, 904-6011, 904-6030, 68210084AA, 5295473, A2C8978770002, A2C34947100-01

Key technical specifications:

• Operating voltage: 12V DC / 24V DC (dual voltage compatible)

• Measuring range: NOx 0–2500 ppm, O₂ 0%–21%

• Response time: t10↔90% < 3500 ms

• Light-off time: < 100 seconds (from dew point)

• Design life: 6,000 operating hours or 350,000 km

• Thread: M20 x 1.5

• Torque specification: 40–60 Nm

• Certifications: TS16949, CE, CCC, ISO14001, IATF16949

• Compliance: EPA 2010, Euro V, China V/VI

Compatible engine platforms:

• Cummins 6.7L (ISB / ISB6.7)

• Cummins ISC 8.3L

• Cummins ISL 8.9L / 8.3L

• Cummins ISX 11.9L / 15L (in select applications)

• Cummins F3.8

Vehicle applications (representative):

• Dodge / Ram: 2500, 3500, 4500, 5500 (6.7L, 2013–2018)

• Freightliner: M2, Cascadia, various models

• Blue Bird: All American FE, All American RE, Vision School Bus

• International: 4300 Series, other commercial trucks

• IC Corporation: CE School Bus

Failure symptoms to watch for:

• Check engine light illumination

• Diagnostic codes: P2202, P229E, P229F, P229F62, U029E, U029D

• Reduced engine power / limp mode

• Poor fuel economy

• Increased DEF consumption

• Failed emissions test

• DPF clogging risk

Installation requirements:

• Do NOT apply anti-seize to threads

• Do NOT touch ceramic sensing element

• Verify part number and placement position (upstream vs. downstream) before purchase

• Professional installation and mandatory ECU adaptation required after replacement

• Perform torque to 40–60 Nm

• Re-use old mounting bracket if needed

• CRITICAL NOTE – PART NUMBER VERIFICATION: Always verify the exact original sensor part number before purchasing. Cross-references include 5WK96742, 5WK96742B, 2872948, 4326873, and others. Different suffixes may have different CAN message IDs or calibration parameters. Match the full alphanumeric string on your original sensor.

• CRITICAL NOTE – ECU ADAPTATION IS MANDATORY: A physical NOx sensor replacement must be paired with an ECU adaptation or reset to clear permanent fault codes and restore SCR efficiency. Disconnecting the battery will NOT work. Without proper adaptation, you will still see DTCs even with a brand new sensor. Error cleaning may be required after fitting a new NOx sensor, but just once after installation.

Proper selection (matching the part number 5WK96742A and confirmed cross-references), careful installation using correct torque (40–60 Nm), and mandatory ECU adaptation ensure full emissions compliance, optimal fuel economy, and reliable SCR system performance. Use this guide to confidently purchase and replace a failed 5WK96742A NOx sensor without compatibility issues or repeat failures.

For further technical support, refer to your engine or vehicle manufacturer's service documentation or consult a qualified diesel emissions specialist.