Hydraulic Pump Seal Kit BMW E60 M5 E63 M6 SMG III

The pressure accumulator is responsible to store the pressure of the hydraulic system for later access by the actuators. This piston type accumulator has two cells: one cell storing the hydraulic fluid and one cell containing a Nitrogen gas filling which creates the counterpressure. Both cells are separated by a moving piston. Typical symptoms of a faulty pressure accumulator are frequent and short pump cycles. If there is no more preload pressure left in the accumulator, the pump runs every few seconds, which ultimately leads to a consequential damage of the pump motor. Along with the pump motor, a faulty pressure accumulator is one of the most common causes of pressure build-up issues and is one of the few wear parts in the system that should be regularly checked and replaced if necessary.

The replacement part we offer is a brand-new OE upgrade with improved internal piston seals, resulting in significantly increased durability.

New wiring harness to repair the gear position sensor strip located on top of the gearbox. Roughened or frayed cables are a common problem with this wiring harness. When the insulation of the cables is broken, short circuits occur, which lead to various SMG malfunctions and error messages (for example 4F80, 4F82, 4F85). Our wiring harness repair kit is supplied with a ready-made original BMW connector.