Control Unit 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.

• Seal kit for the hydraulic pump of the M5 / M6 SMG III
• Damaged or hardened seals may cause the pump to be unable to build up pressure
• Precisely fitting seals made of high-quality material