Clutch Master Cylinder with Switch Compatible with VW Vehicles – 15.90mm

Restore original clutch function and electrical integration in your Volkswagen with this Clutch Master Cylinder featuring an integrated switch, specifically engineered for precision fitment and reliable performance. Designed for models requiring a 15.90mm bore size, this unit ensures balanced hydraulic output while also maintaining the electrical control necessary for safety and convenience features such as cruise control disengagement and start authorization. Built to replace OEM part number 1K0721388AB, it delivers factory-spec pressure consistency, leak-free operation, and long-term durability, making it an ideal choice for both professional repairs and DIY installations. \n \nReplaces OEM part number 1K0721388AB. \n \nCompatible with Multiple Volkswagen Platforms: This master cylinder is designed for use across a broad range of Volkswagen vehicles that require a 15.90mm bore and include an integrated clutch switch. It aligns with the original hydraulic and electrical systems without the need for modifications, ensuring correct clutch pressure delivery and maintaining key vehicle functions like engine start interlocks and cruise disengagement. \n \n15.90mm Bore Ensures Accurate Hydraulic Function: The precision-machined 15.90mm bore delivers the correct fluid displacement needed for reliable clutch engagement and disengagement. This ensures smooth pedal action, responsive shifting, and consistent operation under varying loads, ideal for restoring the original driving experience in both manual transmission daily drivers and performance-oriented models. \n \nIntegrated Switch for Full System Compatibility: The included clutch switch restores or retains essential electronic functions often linked to clutch actuation. This includes enabling start/stop systems, cruise control shutoff, or ECU signals necessary for proper vehicle operation. The switch comes pre-installed and calibrated, offering plug-and-play convenience with OEM-style connectors. \n \nEngineered with High-Quality, Long-Lasting Materials: Constructed from corrosion-resistant metal with heavy-duty polymer and rubber components, this clutch master cylinder is built to handle harsh driving conditions. The internal seals are fluid-resistant and maintain pressure integrity over time, while the body resists wear, cracking, and vibration-related fatigue. \n \nPrevents Leaks and Improves Pedal Consistency: Worn or leaking master cylinders often lead to a soft pedal, delayed clutch response, or fluid loss. This replacement unit restores full sealing and pressure stability, eliminating those symptoms and delivering a firm, predictable pedal feel essential for confident driving and safe gear transitions. \n \nDirect Replacement for OEM Part 1K0721388AB: This component is dimensionally matched to the original unit for quick and hassle-free installation. The port configuration, mounting bracket, pushrod length, and switch harness are all precisely aligned to meet original factory standards, ensuring a straightforward installation with no custom adjustments. \n \nIdeal for Maintenance, Repairs, and Restorations: Whether you're repairing a worn clutch system, replacing a failed master cylinder, or refreshing an older VW for reliable performance, this part is a perfect fit. It delivers OEM-grade performance at a more accessible cost and helps extend the life of the entire clutch and transmission system. \n \nThis Clutch Master Cylinder with Switch Compatible with Volkswagen Vehicles – 15.90mm offers the perfect combination of hydraulic precision and electronic compatibility. Built to replace OEM part number 1K0721388AB, it ensures complete clutch system restoration, improves drivability, and maintains the functional integrity of critical systems in your VW. \n \nPlease refer to the image to ensure suitability.