Engine Coolant Hose For Mercedes-Benz GL450 GL550 ML550 – OEM 1665001091 Replacement By Partscollect

This is a direct-replacement engine coolant hose for a range of Mercedes-Benz models, including the GL450, GL550, GL63 AMG, GLS550, ML550, and ML63 AMG.

It's the front-mounted pipe, sometimes called a vent line.

The OEM part numbers are 1665001091, 1665000291, and 166-500-10-91.

This one from Partscollect is made of durable black rubber and fits exactly like the factory part.

No mounting hardware included, just the hose itself.

If your original is cracked, leaking, or just old, swap it out before you overheat.

Comes with a 1-year warranty.

Check your fitment—fits 2013-2019 models roughly.

Keep your German luxury SUV running cool.