Audi Clutch Slave Cylinder - LuK 8K0721257A

Product Information

A clutch slave cylinder is a hydraulic component in a manual transmission system that assists in engaging and disengaging the clutch. When the clutch pedal is pressed, hydraulic fluid is forced into the slave cylinder, which then moves the clutch release fork, allowing the driver to shift gears smoothly. It works in tandem with the clutch master cylinder to transfer force from the pedal to the clutch assembly.

• Difficulty Shifting Gears: If the slave cylinder fails, it may not fully disengage the clutch, making it difficult to shift gears smoothly, especially into first or reverse
• Soft or Spongy Clutch Pedal: A common symptom is a spongy or soft feel when pressing the clutch pedal, as the slave cylinder fails to build adequate hydraulic pressure
• Clutch Pedal Stuck to the Floor: In severe cases, the clutch pedal may stick to the floor or be slow to return, preventing proper clutch engagement and making it hard to drive.

About LuK

LuK was founded in Germany in 1965. LuK invented the diaphragm spring clutch and today 1 in 4 cars have a LuK clutch. As a key source for OEM (Original Equipment Manufacturer) automotive clutch, torque converter, hydraulic and transmission systems, LuK is a brand respected for innovation and quality. In fact, LuK recently brought the double-clutch transmission with components for continuously variable transmissions into the auto market.

LuK is part of Schaeffler Technologies, a renowned supplier and industry leader in the manufacturing of OEM and aftermarket automotive parts under the brands INA, FAG and LuK. They are one of the largest German and European industrial companies with family ownership, with 180 locations, presently, in over 50 countries. We offer LuK's full line of OE and OEM components for your European vehicle.

Regardless of whether manual, double clutch, automatic or continuously variable transmission, Schaeffler's LuK product brand offers comprehensive solutions for all technologies and thus also covers up-and-coming drive concepts such as hybrid systems. The portfolio includes all relevant product groups – from flywheels to power transmission, release systems and transmission components.

As a global development partner to the automotive industry, all leading vehicle manufacturers rely on Schaeffler's more than 50 years of expertise in the drive train. ​​​​​ With its LuK products, Schaeffler makes a decisive contribution to ensuring efficient power transmission, increasing driving comfort and simultaneously reducing fuel consumption and emissions. ​​​​​