Power Steering Pump Water Pump Pulley Serpentine Belt For BMW M52TU M54 E46 E39
Aluminum version of the standard water pump pulley / power steering pump pulley used on M52, M52tu and M54 engines. Not for cars before the 1999 model year. In 1999, BMW updated the M52 engine to M52TU (the "tu" short for technical update).