1Fitment: Our turbo wastegate actuator meets all safety standards and matches Oem specification, perfect replacement for A3 1.6 Tdi (8P/Pa) 105 Hp Cayc 2009?; Replacement for Octavia Ii 1.6 Tdi 105 Hp Cayc 2009?2013; Replacement for Rapid 1.6 Tdi 105 Hp Cayc 2012?; Replacement for Vi 1.6 Tdi 105 Hp Cayc 2009?; Replacement for B6 1.6 Tdi 105 Hp Cayc 2009?. 2Oem: The OEMs of this turbo wastegate actuator are 03L253014A, 03L253014AX, 03L253014AV, 03L253014C, 55221160 , 55225439 , 55216672 , 860164 for reference, please check the part number of your item before purchasing. 3Main Function: The wastegate actuator controls the turbocharging output and discharges excess exhaust gas from the turbine wheel. It has a spring and a diaphragm. The spring keeps the wastegate closed until the boost pressure reaches the set value, then opens to allow the gas to escape and reduce the boost pressure. 4Safety Enhancement: Turbo wastegate actuator can control the speed of the turbine, prevent the turbine from overspeed, and regulate the speed of the compressor. This helps protect the turbocharger from unnecessary wear by limiting the maximum boost pressure of the turbocharger to a safe level. 5Direct Replacement: Simple and fast installation, does not require complicated operations, which is convenient to install and use, effectively saving your time and effort.