1、Applicable Model: Heater return thermostat hose is replacement for 1 Series E88 E82 3 series E90 E91, please confirm whether your model is applicable before buying. 2、OE Number: The replace part number of thermostat hose for reference is 17127548222, please confirm whether it is consistent with the OE you need. 3、Optimized Cooling: The thermostat hose is a high performance component that balances the temperature between the oil tank and the water tank. This can help achieve better cooling. 4、Premium Materials: Thermostat hoses are made of durable materials with high durability and excellent high temperature resistance. There will be no problems such as aging, damage or leakage due to long term use. 5、Simple Installation: Hoses are easy to install and generally do not require special tools, professional skills or mechanical knowledge, which does not take long.