This hose connects from the front of the cylinder head to the thermostat. Over time, rubber hoses can become hard, with the internal walls covered in sediment and the plastic fittings turning brittle or the internal o-rings simply leaking. A smart hose to replace for any owner BMW owner looking to preventively maintain or restore their cooling system. We've found these Febi hoses to be great quality, which is manufactured by an original equipment supplier.

Part Number: 11537545890 
Rein Part Number: CHE0457