Coolant Expansion Tank + Cap + Sensor For Mercedes-Benz X166 W166 1665000049

Coolant Expansion Tank + Cap + Sensor for Mercedes-Benz

This coolant expansion tank assembly, featuring a recovery cap and integrated level sensor, manages engine coolant expansion and monitors fluid levels for Mercedes-Benz, referencing OEM part number 1665000049.

Overview

The Coolant Expansion Tank + Cap + Sensor provides a reliable replacement for cracked or leaking factory reservoirs in luxury vehicles. This Coolant Expansion Tank + Cap + Sensor regulates the cooling system's pressure and alerts the driver when fluid levels drop. It is engineered for vehicle owners and technicians seeking to prevent engine overheating due to reservoir failure.

Built For Performance

• Molded from durable, heat-resistant plastic to withstand cooling system pressures
• Includes a pre-installed fluid level sensor to provide real-time dashboard alerts
• Comes with a pressure-rated radiator cap to maintain optimal system pressure
• Matches original equipment mounting points for a secure and direct fit

Fits These Machines

• for Mercedes-Benz X166
• for Mercedes-Benz W166

On-The-Job Use

• Replacing a cracked coolant reservoir to stop active fluid leaks
• Restoring proper cooling system pressure and preventing air locks
• Resolving false or missing low coolant dashboard warning lights

Specs At A Glance

Good To Know

Q: Why do expansion tanks crack over time? A: Constant exposure to extreme temperature cycles and high pressure causes the plastic to become brittle and eventually split.

Q: Is the sensor easily replaceable if it fails in the future? A: Yes, the integrated level sensor can be serviced, though this unit comes with a pre-installed sensor for immediate use.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.