Rein 166-500-85-75 Engine Coolant Radiator Hose Lower Right to Cooler

The Rein 166-500-85-75 is a direct-fit replacement lower radiator coolant hose engineered to OEM specifications for select Mercedes-Benz GL, GLS, and ML-Class vehicles. This hose routes coolant from the right side of the engine to the cooler, forming a critical link in the engine cooling circuit that maintains safe operating temperatures under all driving conditions.

Key Features:

• OEM-equivalent construction — manufactured to match the original equipment fit, form, and function of the factory hose
• Heat and pressure resistant — built to withstand the high temperatures and coolant pressures found in modern turbocharged and naturally aspirated V8 engines
• Flexible rubber construction — provides a secure, leak-free seal at both connection points while accommodating normal engine movement
• Direct replacement — no modification required for installation; drops in exactly like the original part
• OEM cross-reference: 1665008575 / 166 500 85 75 / 166.500.85.75

The Rein brand is a trusted supplier of European automotive cooling, fuel, and rubber components. Replacing a worn, cracked, or leaking coolant hose promptly is essential to preventing engine overheating and coolant loss. This hose is the right-side lower hose routed to the oil cooler circuit and is sold as an individual component.