For A1664102901 W166 GLS400 GLS320 GL450 GLS450 Constant velocity joint Drive shaft Steering Axle car Auto parts This constant velocity joint drive shaft is designed for use with vehicles requiring the A1664102901.It is compatible with W166 models including GLS400, GLS320, GL450, and GLS450.The component functions as part of the steering axle system and is engineered to transmit power smoothly between the transmission and wheels at varying angles.Constructed for in automotive drivetrain applications, it serves as a replacement part for drive shaft assemblies. Disclaimer: This is an aftermarket spare part.Trademarks are used only to specify compatible devices.