Genuine 1665001091 Engine Coolant Overflow Hose

The Genuine 1665001091 is an OEM engine coolant overflow hose designed for Mercedes-Benz vehicles. This factory-specification hose connects the coolant expansion tank to the radiator, playing a critical role in maintaining proper coolant circulation and preventing engine overheating.

Key Features:

• Genuine Mercedes-Benz OEM part manufactured to exact factory specifications
• Functions as both overflow hose and coolant recovery line between expansion tank and radiator
• Constructed from durable rubber and plastic materials engineered to withstand high temperatures and coolant system pressures
• Direct replacement for worn or damaged original hose with guaranteed proper fitment
• Also known as bleed line, breather pipe, or vent line in cooling system diagrams

OEM Cross-References: A1665001091, 166-500-10-91, A 166 500 10 91. Replaces previous part number 166-500-02-91.

This genuine replacement part ensures your Mercedes-Benz cooling system operates at peak efficiency with the reliability and durability expected from factory OEM components. Backed by manufacturer warranty for quality assurance.