GPD 1815178 Nitrogen Oxide NOx Sensor Direct Fit Replacement

The GPD 1815178 is a direct-fit replacement Nitrogen Oxide (NOx) Sensor engineered by Global Parts Distributors (GPD) for diesel aftertreatment systems. This sensor is a critical component in exhaust emissions management, designed to meet or exceed OEM fit, form, and function.

What is a NOx Sensor?

A NOx sensor monitors the concentration of nitrogen oxides in exhaust gases and transmits real-time data to the engine control unit (ECU). The ECU uses this data to optimize DEF (Diesel Exhaust Fluid) dosing and regulate the Selective Catalytic Reduction (SCR) system, ensuring the engine meets emissions compliance standards. A failed NOx sensor can trigger fault codes, warning lights, and in many cases, engine power derates or inducement cycles.

Key Features:

• Direct fit replacement — no modification required
• Designed to meet or exceed OEM fit, form, and function
• Durability tested on every new design
• Application-specific engineering for precise signal accuracy
• Supports closed-loop DEF dosing and SCR aftertreatment efficiency monitoring
• Sold as a single sensor

Cross-Reference Part Numbers:

• 050782X, 1815140, 1869930PE, 1869930PRX, 2871974, 2894939
• 2894943CUM, 2894943RX, 2894943RXCUM, 4705622, 4984912
• 50782, 577.90546, 5EL001, 6428405, 904-6002
• BTS041774, CUM-2894943, CUM2894943, NOX-CXX-004
• S-27843, S11943, S27843, WA911-18-8126

GPD (Global Parts Distributors) has been a trusted national distributor of aftermarket automotive and heavy-duty engine management and HVAC parts since 1974, serving customers across the United States from multiple warehouse locations.