Rear Downstream NOx Sensor fits 2.9L 3.6L Industrial Engine 04466642

Product Description

Premium Commercial-Grade Nitrogen Oxide (NOx) Sensor Replacement Resolves Exhaust Codes | Prevents Equipment Derate | Rear Downstream Position

🔍 PRODUCT OVERVIEW This premium aftermarket Nitrogen Oxide (NOx) Sensor is specifically engineered for a massive fleet of modern heavy-duty industrial and agricultural machinery—such as tractors, compact wheel loaders, telehandlers, and excavators—equipped with highly advanced 2.9L and 3.6L industrial turbo diesel engines. The NOx sensor is a critical component of your equipment's Selective Catalytic Reduction (SCR) emissions system. Located strictly in the REAR (Downstream / Post-Cat / After Catalyst) position, it constantly measures the final nitrogen oxide levels leaving the exhaust stream to verify the catalyst is effectively reducing harmful emissions to legal standards.

Operating in brutal industrial and farming environments—surrounded by extreme exhaust heat, relentless vibration, dirt, and heavy diesel soot—the sensitive internal ceramic probe or the electronic control module eventually degrades. When this downstream sensor fails, it immediately triggers the Check Engine Light, logs stubborn emissions codes, and crucially, throws your heavy equipment into Limp Mode (Engine Derate). This severely limits your hydraulic power and speed, preventing your machinery from operating and causing massive downtime on the job site. Replacing your failed sensor with our highly calibrated, commercial-grade assembly instantly restores proper emission readings, clears dashboard codes, and gets your equipment back to work.

  • Position: Rear / Downstream (Post-Catalytic Converter / After KAT)

  • Condition: 100% Brand New in Safe Packaging (1 Piece)

  • Application: 2.9L & 3.6L Industrial Diesel Engine Exhaust Monitoring

  • Reference Numbers: 04466642 / 0446-6642 / 5WK97420

âś… EQUIPMENT COMPATIBILITY

  • Equipment: fits widely popular Premium European-designed Industrial Construction and Agricultural Machinery.

  • Important Note: Commercial diesel emissions systems are highly complex. This sensor is strictly designed for the REAR / DOWNSTREAM position. Please strictly verify your exact OE part number (04466642 or 0446-6642) or the manufacturer hardware stamp (5WK97420) printed directly on your old sensor's control box before purchasing to ensure a 100% plug-and-play fitment.


We accept all payment methods supported by eBay Managed Payments, including Credit Cards (Visa, MasterCard, Amex, Discover), Apple Pay, Google Pay, and PayPal.



  • Immediate Payment: Immediate payment is required for "Buy It Now" items to ensure your order is processed instantly.


  • Sales Tax: eBay may automatically collect sales tax based on your state's regulations. We do not have control over these charges.


  • Order Cancellation: If you placed an order by mistake, please contact us within 1 hour. Once the order is processed or shipped, we cannot cancel it.

Free Shipping & Fast Handling:



  • Handling Time: We usually ship within 1-2 business days (excluding weekends and holidays) after payment is cleared.


  • Tracking Number: A tracking number will be uploaded to your order details as soon as the item leaves our warehouse.


  • Address Accuracy: We only ship to the confirmed address provided by eBay. Please verify your address before checkout. We are not responsible for undeliverable addresses or return shipping fees caused by incorrect addresses.


  • International Buyers: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.

30-Day Hassle-Free Returns: We stand behind our products. If you are not satisfied, you may return the item within 30 days of receipt.



  • Defective/Damaged Items: If the part arrives damaged or doesn't work, please send us pictures/videos first. We will offer a Full Refund or Free Replacement immediately.


  • Bought Wrong Part: If you purchased the wrong part or simply changed your mind, we accept returns, but the Buyer is responsible for return shipping costs. The item must be returned in its original, uninstalled condition.


  • Remanufactured Parts Notice: For remanufactured items, minor cosmetic wear (scratches/discoloration) on the housing is normal and does not affect performance. This is not considered a defect.


  • No Returns on Modified Parts: We cannot accept returns if the item has been modified, disassembled, or damaged due to improper installation.

We are a professional automotive parts supplier dedicated to providing high-quality replacement parts and remanufactured components. With years of experience in the industry, we specialize in Ignition Systems, Fuel Injection, and Engine Components.



  • Quality First: All our remanufactured parts (Distributors, Fuel Injectors) undergo rigorous testing (Flow Matching, Circuit Testing) before shipping.


  • Value for Money: We aim to provide OEM-level performance at an affordable price.


  • Customer Obsession: Your satisfaction is our top priority. We are here to keep your vehicle running smoothly!


We are here to help!



  • Check Fitment First: If you are not sure whether this part fits your car, please send us your VIN (Vehicle Identification Number) or your car's Make/Model/Year/Engine size before purchasing. We will check it for you within 24 hours.


  • Have an Issue? Please contact us via eBay Message BEFORE leaving neutral or negative feedback. We guarantee to solve any problem (Refund, Replace, or Technical Support) to your satisfaction.


  • Business Hours: We respond to all messages within 24 hours (Mon-Fri).

Copyright © 2023 Dianxiaomi