Rein 205-501-53-01 Coolant Bleed Line Vent Hose

The Rein 205-501-53-01 Coolant Bleed Line is a precision-engineered replacement hose designed to restore proper function to the engine cooling system. This bleed line — also referred to as a vent line or vent hose — routes coolant from the expansion reservoir to the shutoff valve, and from the expansion reservoir to the right cooler and engine, allowing trapped air to be purged from the system and ensuring the coolant circuit maintains consistent pressure and flow.

A failed or cracked coolant bleed line can introduce air pockets into the cooling system, leading to overheating, erratic temperature gauge readings, and potential engine damage. Replacing a worn or leaking line with a quality aftermarket part like this Rein unit restores the integrity of the cooling circuit and helps protect the engine long-term.

Key Features:

• Direct-fit replacement for OEM part number 2055015301 (also cross-referenced as 205 501 53 01 and 205.501.53.01)
• Routes from expansion tank/reservoir to shutoff valve
• Also connects expansion reservoir to right cooler and engine
• Manufactured to meet OEM specifications for proper fit and function
• Sold as a single unit

This part is a drop-in replacement for the original Mercedes-Benz coolant bleed line, making it a straightforward service item during cooling system maintenance or repair.