Mercedes W166 Fuel Pump Sender Tank Level Sensor A1664703194

Mercedes W166 Fuel Pump Sender Tank Level Sensor is a precision fuel system component responsible for reliable fuel level readings in the tank. Thanks to its factory design specifically for the W166 series, it ensures stable integration with the vehicle's electrical system and accurate readings on the instrument cluster. This used OEM component is a sensible choice for drivers and workshops looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A1664703194
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664703194
• Substitutable numbers: A1664703194, A 166 470 31 94
• Category: Fuel Pumps & Sending Units

Function and role of the fuel level sensor

The fuel level sensor with float is responsible for continuous measurement of the fuel quantity in the tank and transmitting the signal to the gauge. A properly functioning component in this group allows you to:

• maintain accurate fuel level readings on the dashboard,
• minimize the risk of sudden vehicle immobilization due to lack of fuel,
• ensure correct cooperation with onboard systems that rely on tank status information.

For Mercedes W166 models, using the correct sensor with float is crucial for maintaining full electrical and mechanical compatibility with the original fuel system.

Compatibility and OEM selection

The offered sensor belongs to the Fuel pumps and level sensors group, which means it has been designed to operate in a fuel environment and to work with the factory gauge module. Selection based on the OEM number and interchangeable part numbers allows you to verify compatibility with a specific version of the Mercedes W166, reducing the risk of installation issues and incorrect readings.

If you want to learn more about the cost-effectiveness of using pre-owned measurement and electronic components in a car, it is worth checking out the Global Parts guide: Used automotive electronics on board – why choose second-hand ECU modules and sensors?. You will find practical tips there regarding selection by OEM numbers, compatibility, and installation.

Benefits of using a pre-owned OEM sensor

Using an original, pre-owned fuel level sensor with float in a Mercedes W166 is a solution that combines technical and economic aspects. The most important advantages include:

• Factory fit – maintaining the original operating characteristics of the fuel gauge and proper communication with the vehicle's electrical system.
• Reduction of repair costs – a used OEM component allows for a significant reduction in service costs compared to a new part.
• Proven design – the component comes from Mercedes mass production, which translates into predictable performance during operation.

For workshops and individual users, this means a faster return of the vehicle to full functionality without the need for costly replacement of the entire fuel module.

Condition, installation, and practical service tips

The offered fuel level sensor with float is an aftermarket component prepared for re-installation in the Mercedes W166 fuel system. Before installation, a standard service procedure is recommended, including:

• verifying the electrical harness and connectors for corrosion and damage,
• checking the fuel tank and associated components for leaks,
• verifying the correct operation of the fuel gauge after installation, including the response to changes in fuel level.

This approach allows you to utilize the potential of the used component and ensure stable, repeatable operation of the fuel system in daily use.

Expanding repairs within the fuel system

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

In situations where you want to shorten the vehicle's downtime at the service center and take advantage of readily available used OEM parts, the Global Parts guide may be helpful: Availability of automotive parts on hand vs. repair time – how do used OEM parts shorten workshop stays?. This is a practical source of knowledge for mechanics and users who want to plan repairs effectively.