Clutch Solenoid Valve – Audi R8 S-tronic
The two clutch solenoid valves (N435 and N439) control the hydraulic pressure of clutches K1 and K2 in the Audi R8 S-tronic transmission. Precise pressure regulation enables smooth and accurately controlled clutch engagement during gear changes. A faulty valve can cause harsh or delayed gear changes, clutch control faults or transmission malfunction warnings. We supply a brand-new original BorgWarner replacement part, identical to the component installed by Audi at the factory.
Parking Lock Solenoid – Audi R8 S-tronic
The parking lock solenoid valve N486 is part of the electrohydraulic parking lock system in the S tronic transmission of the second-generation Audi R8. It controls the mechanism that holds the parking lock piston in the P-OFF position and provides an additional safety function to prevent unintended engagement of the parking lock while the vehicle is moving. If the parking lock needs to remain disengaged after the engine is switched off, N486 remains energized and mechanically secures the parking lock piston in the P-OFF position. When the solenoid valve is de-energized, the locking mechanism releases the piston, allowing the parking lock spring to move it into the P-ON position. A defective N486 can cause parking lock malfunctions, warning messages, or problems engaging and releasing position P.
Sub-Transmission Safety Valve – Audi R8 S-tronic
Two safety solenoid valves are installed in the Audi R8 S-tronic, one for each gear train subset. N436 controls the hydraulic pressure supply to clutch K1 and the associated gear-shift actuators, while N440 performs the same safety function for clutch K2 and its gear-shift actuators; in the event of a relevant fault, the respective gear train subset can be hydraulically deactivated. We supply a brand-new original BorgWarner replacement part, identical to the component installed by Audi at the factory.