CATEngine Parts

570-1261 Nitrogen Oxide Exhaust Sensor — Cat C18 C32

This Nitrogen Oxide (NOx) sensor is a vital part of the engine's exhaust aftertreatment system, measuring the level of NOx emissions to optimize the SCR (Selective Catalytic Reduction) system. Manufactured to meet precise OEM specifications, it ensures accurate readings for efficient emissions control and engine performance. Symptoms of a failing NOx sensor include illuminated check engine lights, reduced engine power, and increased exhaust emissions.

Nitrogen Oxide Exhaust Sensor – Part No 570-1261 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeNitrogen Oxide (NOx) Sensor
MaterialStainless Steel, Ceramic
ApplicationExhaust Aftertreatment System (SCR)
Service LifeReplace based on diagnostic codes or performance issues
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A faulty NOx sensor may first manifest as a dashboard warning light, such as a check engine or emissions system alert. If ignored, the engine control module may enter a derated mode, reducing power to protect the aftertreatment system, and potentially leading to increased fuel consumption and non-compliance with emissions regulations.

Installation Tip

Ensure the exhaust system is cool before attempting removal and installation to avoid burns. Always use the correct thread sealant if specified, and do not overtighten the sensor to prevent damage to the threads.

Service Note

When replacing a NOx sensor, it is advisable to check the Diesel Particulate Filter (DPF) and the Diesel Exhaust Fluid (DEF) system for proper operation and any related fault codes.