1、Applicable Model: Tranmission valve body seal is replacement for X3 Z4 135i X5, please confirm whether your model is applicable before buying. 2、OE Number: The part numbers for reference are ZF6HP19, ZF6HP19X, ZF6HP21, please confirm whether it is consistent with the OE you need. 3、Good Sealing: Valve body seal kit is effective enough to prevent fluid or gas leakage, to ensure the normal operation of the valve body and not affected by the external environment. 4、High Durability: Valve body sealing sleeve ensures reliable sealing in extreme temperature conditions, including high and low temperature. 5、Corrosion Resistant: Valve body sealing kit has undergone special material treatment and coating process, and can be used stably in harsh medium environments for a long time.