The expansion tank in your BMW is a vital component of the cooling system, and because of the constant abuse from heat and temperature changes it often fails. ECS Tuning has created a kit that includes a replacement expansion tank and level sensor with clip as well as a cap. Whether you are doing preventative maintenance or fixing a failed tank, this kit is convenient and complete.
Note: For vehicles with an automatic transmission it is common for the transmission thermostat to break during removal. It is recommended to purchase part number 17111437362 with this kit.
