5594498 Niltrogen Oxygen Sensor for Cummins LSC ISL 8.9L Replace No. A064E128

The 5594498 Nitrogen Oxygen (NOx) Sensor is a replacement part designed for Cummins LSC ISL 8.9L engines, replacing the original part number A064E128. Here’s what you need to know:

Key Features:

• Direct Replacement: Compatible with Cummins LSC ISL 8.9L engines, ensuring proper fitment and function.

• NOx Sensor Function: Monitors nitrogen oxide (NOx) levels in the exhaust system to help the engine control module (ECM) manage emissions compliance (critical for EPA/DEF/SCR systems).

• OEM Equivalent: Meets or exceeds OEM specifications for performance and durability.

Common Applications:

• Used in medium/heavy-duty trucks, buses, and industrial equipment with the Cummins ISL 8.9L engine.

• Often found in vehicles with Selective Catalytic Reduction (SCR) aftertreatment systems.

Symptoms of a Failing NOx Sensor:

• Check Engine Light (CEL) or SCR/DEF system warnings.

• Fault codes like SPN 3216 (NOx Sensor 1/2 Performance) or SPN 3711.

• Reduced engine performance or limp mode due to incorrect NOx readings.

• Increased emissions or failed inspections.

Installation Notes:

• Reset/Relearn Required: After replacement, some systems may need a diagnostic reset or ECM relearn procedure.

• Compatibility Check: Verify this sensor matches your engine’s exact model year and calibration(some ISL variations may have different sensor revisions).

• Quality Assurance: Purchase from a reputable supplier to avoid counterfeit parts that may cause premature failure.

Legal & Warranty Considerations:

• Emissions Compliance: Replacing a faulty NOx sensor helps maintain EPA compliance—tampering or deleting emissions components is illegal for on-road use.

• Warranty Impact: If your vehicle is under warranty, using OEM-approved parts may be required to avoid voiding coverage.