BMW E46 E60 E63 E64 E85 330i 525i SMG I Hydraulic Unit Pump assembly 23427571297 23427507107

New replacement OEM BMW SMG hydraulic pump complete with hardware and seals.

This smg pump is responsible for building hydraulic pressure in SMG system and allows for clutch actuation as well as all gearbox shifting. A failed pump can cause erratic transmission and drivability issues from miss shifting, not shifting to vehicle engine not starting. 

SMG pump motor will wear out over time and fail internally around 60,000 to 80,000 miles depending on driving habits.

We suggest replacing relay as it normally gets damaged over time and can effect the new replacement SMG pump by shorting it out

OEM Part numbers;

• 23427571297
• 23017568176
• 23427507107