Accumulator – Audi R8 R-Tronic
The accumulator is responsible to store the pressure of the hydraulic system for later access by the actuators. The bladder type accumulator has two cells: one cell storing the hydraulic fluid and one cell containing a gas to create counterpressure. Both cells are separated by a membrane. These accumulators have a certain life span and a common defect is that the gas leaks out of the cell, which causes the system to be unable to build up hydraulic pressure. In many of such cases, the pump appears to prime permanently.
We offer the brand new original Magneti Marelli spare part.
Clutch valve – Audi R8 R-Tronic
The clutch solenoid valve (marked with “QPV”) is responsible for the clutch actuation of the R-Tronic system. A faulty valve can cause problems while engaging the clutch (for example shuttering) and in consequence the car refuses to change gears.
This is an original and new Magneti Marelli spare part.
Gear sensor – Audi R8 R-Tronic
The R-Tronic gear sensors (potentiometers) are responsible to detect the current state of the gear engagement. There are two of these sensors installed on the R-Tronic actuator. A faulty sensor can prevent the car to engage gears or shift.
We sell an original spare part from Magneti Marelli.
On/Off valve – Audi R8 R-Tronic
The On/Off solenoid valve is located on the gear actuator and is responsible for gear changes.
This is an original and new Magneti Marelli spare part.
Pressure sensor – Audi R8 R-Tronic
The pressure sensor is responsible to detect the hydraulic pressure in the accumulator of the R-Tronic system. This is an original and brandnew spare part.
Pump motor – Audi R8 R-Tronic
The pump motor drives the gear pump, which generates the pressure for the R-Tronic transmission. Both parts together form the hydraulic pump. Without hydraulic pressure, the transmission cannot perform any action – neither change gears, nor operate the clutch. Therefore, the hydraulic pump is the most important component in the system.
In most cases, it is sufficient to replace only the electric motor, as this is a wearing part. The gear pump fails only very rarely. Another advantage is that when only the pump motor is changed, the hydraulic system does not need to be bled afterwards, unless it has been opened.
We sell an original, brand new Magneti Marelli spare part – the same part you would get from Audi.
Service Kit Hydraulic Pump – Audi R8 R-Tronic
The service kit includes the plastic coupling, which connects the shaft of the gear pump with the shaft of the electric motor, as well as seals.
Shift valve – Audi R8 R-Tronic
The shift solenoid valves (marked with “PPV”) are responsible for changing the gears of the R-Tronic system. There are two of these valves on the actuator. Together with the on/off valve, they operate the shift actuator. If one of the valves is faulty, the car will refuse to go into one or more gears.
This is an original and new Magneti Marelli spare part.
Transmission speed sensor – Audi R8 R-Tronic
This sensor provides the speed signal of the transmission input shaft. The speed signal is required by the control unit to control the transmission system, adjusting properly the shaft speeds before engaging and disengaging the different gears.