Mercedes W204 M276 NOX Sensor Adapter Right O/S Harness Wiring Cable A2075404207

Mercedes W204 M276 NOX Sensor Adapter Right O/S Harness Wiring Cable is an original electrical installation component designed to support the NOX sensor in Mercedes vehicles. It belongs to the Wires, harnesses, and connectors group and has been engineered to provide a stable connection between the sensor and the engine control system. Thanks to its factory design, it ensures a secure fit for the right-hand side installation in the engine bay.

Specifications and technical data

• SKU: A2075404207
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2075404207
• Substitutable numbers: A2075404207, A 207 540 42 07
• Location on the vehicle: Right
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function of the NOX adapter

The presented harness is a dedicated NOX sensor adapter mounted on the right side of the vehicle, in the front part of the exhaust system. It is responsible for the electrical connection between the sensor and the vehicle's wiring, which enables the engine control unit to correctly read exhaust parameters.

Using the correct adapter in this area is important for:

• stable signal transmission from the NOX sensor to the controller,
• maintaining the proper operation of the emission control system,
• avoiding diagnostic errors related to open circuits or signal interference.

Construction and fitment for Mercedes installations

The adapter belongs to the Wires, harnesses, and connectors group, meaning it is a component prepared to operate in the demanding environment of the engine bay. The connectors used are factory-matched to the sockets in the Mercedes installation, which facilitates assembly without the need for modifying wires or using additional adapters.

The placement on the right side of the vehicle is structurally intended, which is why the cable length, routing geometry, and connector types are adapted to the factory harness layout. This allows for maintaining order in the installation, reducing wire tension, and minimizing the risk of mechanical damage during operation.

Benefits of using an original harness

Using an original NOX sensor adapter in a Mercedes provides a number of practical technical benefits:

• Compatibility with the installation – the connectors and cable routing are consistent with the factory design, which reduces the risk of electrical contact issues.
• Stable emission system operation – a proper NOX sensor connection supports the correct functioning of the exhaust control system and limits the appearance of errors in the controller.
• Assembly safety – no need for soldering or creating custom adapters reduces the risk of damaging the installation and facilitates future service.

The used component allows for an economical vehicle repair while maintaining the manufacturer's original specifications, which is particularly important for components related to engine electronics.

Professional use in service and repairs

The right-side NOX sensor adapter will prove useful both in professional service centers and in workshops specializing in the Mercedes brand. It facilitates restoring the efficiency of the exhaust emission system after harness damage, interference with the installation, or sensor replacement.

In workshop practice, such an element is particularly useful for:

• repairs after corrosion or mechanical damage to wires,
• NOX sensor replacement requiring the restoration of a proper connection,
• diagnosing sensor signal problems when there is a suspicion of harness damage.

To better plan complete procurement of original used components and optimize the repair process, it is worth checking the guide in the article Comprehensive supply: from the engine to the smallest clip, which discusses the advantages of the One‑Stop‑Shop approach.

Expanding the installation within Mercedes wires and connectors

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Mercedes and need other elements from the same group, such as additional harnesses, sensor adapters, or installation connectors, check the available parts in the Mercedes wires, harnesses, and connectors category.

Summary

Mercedes W204 M276 NOX Sensor Adapter Right O/S Harness Wiring Cable is a practical solution for users and service centers that want to restore the proper operation of the exhaust emission system without compromising the original installation design. The appropriate placement on the right side, factory connectors, and membership in the Wires, harnesses, and connectors group make this component a solid foundation for professional NOX system repair in Mercedes vehicles.