Rein 651-203-03-00 Engine Coolant Connector Hose Outlet to Thermostat

The Rein 651-203-03-00 is an OE-quality engine coolant connector hose designed as a direct replacement for select Mercedes-Benz vehicles equipped with the 2.1L engine. This hose routes coolant from the engine outlet to the thermostat housing, playing a critical role in maintaining proper engine temperature and preventing overheating.

Key Features:

• Direct OE replacement — engineered to match original equipment in fit, form, and function
• Connects the coolant outlet to the thermostat housing on 2.1L engines
• Manufactured from high-quality rubber compound to withstand engine heat and coolant pressure
• Precision-molded construction ensures a leak-free seal and long service life
• Drop-in installation with no modifications required

OEM Cross-Reference: Mercedes-Benz OEM Part Number 651-203-03-00

Rein Automotive specializes in cooling system components and undercar parts, offering broad coverage for European vehicles. This coolant hose is a reliable, cost-effective alternative to dealer-sourced parts without sacrificing quality or fitment accuracy.