Walker 1004-1027 Nitrogen Oxide (NOx) Sensor - SCR Catalyst Outlet
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Walker 1004-1027 Nitrogen Oxide (NOx) Sensor - SCR Catalyst Outlet

Brand Walker 1004-1027
Position SCR Catalyst Outlet
Color Black
Finish Matte
Wiring Harness Length 590.00
Connector Color Black
Universal Or Specific Fit Specific
Connector Shape Oblong
Terminal Quantity 4
Connector Gender Female
Terminal Gender Male
Fits —

Genuine OE quality. Built to match the standards of leading manufacturers.

Plug-and-play installation. Uses OE connectors and harness lengths for seamless fit.

NOx monitoring. Helps manage emissions in selective catalytic reduction systems.

Cross-references 22303391 for the same application. See all 1.

$310.20Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Nitrogen Oxide (NOx) Sensor options

Walker Genuine OE NOx Sensor 1004-1027

Walker Genuine OE NOx Sensor 1004-1027 is built for diesel and gasoline emission systems that rely on accurate nitrogen oxide monitoring. It uses OE-style connectors, a specific-fit design, and a 590.00 wiring harness length for direct replacement service on select applications.

Key Features

  • Genuine OE line sensor for selective catalytic reduction (SCR) emission systems
  • Specific-fit design with black finish and black connector color
  • Oblong female connector with 4 terminals and male terminals
  • 590.00 wiring harness length for OE-style routing
  • Built for high-heat, vibration, and corrosive exhaust environments
  • Direct replacement for applications that use part number 1004-1027

Product Details

Walker Products Genuine OE NOx sensors are produced to OE-level standards by Tier 1 OE suppliers, using the materials and precision expected in modern emission control systems. This sensor measures NOx levels in SCR-equipped vehicles so the aftertreatment system can manage exhaust chemistry accurately, helping maintain DPF protection and overall engine efficiency. The 1004-1027 part number is also referenced for the same application as 22303391. For buyers searching for a NOx sensor for diesel emission repair, Walker 1004-1027 is a direct-fit service part for select domestic and import vehicles, including Chevrolet Silverado and GMC Sierra applications where this sensor is specified.

Common Issues This Part Can Address

  • NOx sensor fault codes
  • Incorrect exhaust emissions readings
  • SCR system performance warnings
  • Aftertreatment efficiency concerns
  • Check engine light related to NOx monitoring

Installation Notes and Tips

Use the OE connector and harness layout to match the original routing before installation. Confirm the connector shape, terminal count, and harness length against the removed sensor to ensure the correct specific-fit replacement. For fitment-based searches, this part is commonly referenced for Chevrolet Silverado and GMC Sierra diesel emission service where the OE application calls for Walker 1004-1027.

Quality Assurance

Walker Genuine OE NOx sensors are manufactured to meet OE supplier standards and are field-tested for demanding exhaust conditions. The brand line focuses on direct replacement quality, precise signal measurement, and consistent performance in SCR-equipped emission systems.

Related reading

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
22303391