Audi Clutch Master Cylinder - LuK 893721401D

Product Information

The clutch master cylinder is a critical component of a hydraulic clutch system in manual transmission vehicles. It is responsible for converting the mechanical force applied by the driver’s foot on the clutch pedal into hydraulic pressure, which then engages or disengages the clutch. The master cylinder is connected to the clutch pedal and the slave cylinder via a hydraulic line.

• Difficulty Engaging or Disengaging the Clutch: A failing master cylinder can make it hard to press the clutch pedal down or may result in the clutch not fully disengaging, causing difficulty in shifting gears
• Spongy or Soft Clutch Pedal: If there are air bubbles in the hydraulic system due to a leak or failure, the clutch pedal may feel spongy or soft, requiring more effort to engage the clutch
• Fluid Leaks: Visible leaks around the clutch master cylinder or along the hydraulic line can indicate a failure. This may be noticed as fluid pooling under the vehicle or around the clutch pedal area

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. ​​​​​