Mercedes GLE W166 W169 Fuel Rail High Pressure Fuel Sensor Diesel A0235455226

Mercedes GLE W166 W169 Fuel Rail High Pressure Fuel Sensor Diesel is an original fuel system component designed for Mercedes diesel engines, ensuring precise pressure measurement in the fuel rail. Thanks to its factory operating characteristics, the sensor supports stable engine performance, correct fuel dosing, and efficient operation of the injection system. This is a solution for users who expect consistency with factory electronics and reliable fitment for the fuel system.

Specifications and technical data

• SKU: A0235455226
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0235455226
• Substitutable numbers: A0235455226, A 023 545 52 26
• Fuel type: Diesel
• Category: Air Intake & Fuel Sensors

Purpose and role in the fuel system

The presented sensor belongs to the Air and fuel intake sensors group and works with diesel engines in selected Mercedes GLE models and other vehicles from this brand. Its task is to continuously measure fuel pressure in the common rail system and transmit a signal to the engine control unit, which regulates the injection dose based on this data.

Stable fuel pressure readings have a direct impact on:

• proper starting of the diesel engine,
• smooth engine operation across the full load range,
• maintaining appropriate dynamics while ensuring fuel economy,
• reducing smoke and irregular injector operation.

Benefits of using an original Mercedes sensor

Choosing an original fuel pressure sensor for a Mercedes translates into high compatibility with the factory ECU software and injection system parameters. The component is designed specifically for the characteristics of this brand's diesel engines, which facilitates diagnostics and eliminates problems resulting from the use of replacements with different measurement curves.

Key advantages include:

• Factory signal characteristics – the engine control unit receives data in the form intended by the vehicle manufacturer.
• Proper cooperation with the common rail system – the sensor supports maintaining the correct fuel pressure under various load conditions.
• Better parameter repeatability compared to random replacements of unknown origin.

Operational characteristics and installation

The offered sensor is a used part, which in practice allows for an economical repair of the fuel system while maintaining the manufacturer's original specifications. In most cases, installation involves mechanically screwing the sensor into the fuel rail and connecting the factory wiring harness, without the need for system modifications.

When replacing the fuel pressure sensor in a diesel engine, it is worth paying attention to:

• the cleanliness of the mounting socket and seal,
• proper tightening according to service recommendations,
• checking the system for leaks after the first start-up,
• clearing any error codes in the ECU memory after installation.

Selection by part numbers and compatibility

The fuel pressure sensor used in the Mercedes GLE and related models is a component linked to specific manufacturer markings and interchangeable numbers. When selecting parts, it is recommended to use the OEM number or catalog data to ensure full compatibility with the specific diesel engine version and the injection system used.

To better understand the principles of selecting used sensors and electronic modules, it is worth reading the guide on automotive electronics, which discusses, among other things, selection by VIN/OEM, hardware and software compatibility issues, and practical application examples: Used automotive electronics – a guide to selecting ECU modules and sensors.

System expansion and related parts

In case of diesel engine performance issues, broader diagnostics of the entire fuel system are often necessary, covering not only the fuel pressure sensor but also other components responsible for measuring air and fuel parameters. If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as air temperature sensors, boost pressure sensors, or additional fuel sensors, check the available parts in the Mercedes air and fuel intake sensors category.

Summary

Mercedes GLE W166 W169 Fuel Rail High Pressure Fuel Sensor Diesel is a solution for users who want to restore the correct operating parameters of the injection system without compromising the original manufacturer's specifications. A properly selected and correctly installed sensor supports smooth engine operation, stable fuel pressure, and predictable engine behavior in daily use.