Mercedes W166 Fuel Tank Level Sensor Sender Diesel 651960 A1664702394

Mercedes W166 Diesel Fuel Level Sensor is a precise component of the fuel system, responsible for reliable reading of the diesel fuel quantity in the tank. Thanks to its factory design intended for Mercedes W166 models and compatibility with the Diesel engine, this component ensures stable fuel gauge operation and proper communication with the vehicle's electronics. It's a practical solution for replacing a damaged sensor or for professional fuel system repairs.

Specifications and technical data

• SKU: A1664702394
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664702394
• Substitutable numbers: A1664702394, A 166 470 23 94
• Fuel type: Diesel
• Part type: Fuel Sending Unit
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The presented fuel level sensor is a part of the Fuel Pumps and Level Sensors group, designed to work with the diesel fuel supply system in the Mercedes W166. Its task is to continuously measure the amount of fuel in the tank and transmit the signal to the instrument cluster and vehicle control units. A properly functioning sensor reduces the risk of incorrect readings, sudden vehicle stalling due to lack of fuel, and facilitates the diagnosis of potential fuel supply problems.

Compatibility and OEM Identification

This component was developed as part of the original Mercedes design, which facilitates selection by OEM number and integration with the factory fuel system. This gives the user confidence in the correct fit for a specific body style and diesel engine version. The presence of interchangeable numbers allows for technically correct comparison with other sensor variants used on the same vehicle platform, which is particularly important for professional servicing.

Technical Characteristics and Role in Diesel Engines

A fuel level sensor compatible with a Diesel system must meet requirements for resistance to diesel fuel and parameter stability across a wide range of temperatures and operating conditions. In vehicles with diesel engines, precise information about the fuel quantity is important not only for the driver but also for the control units responsible for the engine's operating strategy and onboard systems. The use of a dedicated sensor for this drive version supports the correct operation of the fuel gauge, onboard computers, and functions related to range and fuel consumption.

Condition, Service Application, and Benefits of Installation

The offered part is used, making it an attractive solution for economical fuel system repairs in the Mercedes W166. Replacing a faulty sensor with a functional component from the same group allows for the restoration of correct fuel level readings without the need to interfere with the electrical system or modify the tank. It's a practical option for both workshops specializing in the Mercedes brand and for users who service their vehicles themselves.

Technical Support and Fuel System Knowledge

To better understand the role of the fuel level sensor in the entire fuel system, it is worth consulting specialized materials on diagnostics and operation. A detailed discussion of the system's construction and operation, including injectors, pumps, and the fuel tank, can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Reconditioning, which helps in selecting the correct components by OEM and VIN number and explains typical fault symptoms.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other parts from the same group, such as pump modules, additional level sensors, or fuel basket components, check the available parts in the Mercedes Fuel Pumps and Level Sensors category.