ATE 251-611-243 Brake Master Cylinder to Brake Booster O-Ring Seal

The ATE 251-611-243 is a precision-engineered rubber O-ring seal designed to create a reliable seal between the brake master cylinder and brake booster. This critical component ensures proper hydraulic brake system function by preventing fluid leaks at this crucial connection point.

Key Features:

• High-quality rubber construction for durability and reliable sealing
• Precision-molded to OEM specifications for proper fit and function
• Essential replacement component during brake master cylinder service
• Manufactured by ATE, a Continental AG division with over a century of brake system engineering expertise

Important Installation Note:

• This O-ring is a single-use component and cannot be reused once removed
• Should be replaced anytime the brake master cylinder is removed or serviced
• Proper installation ensures leak-free operation of the brake hydraulic system

This seal is commonly found on Porsche, Volkswagen, and other European vehicles equipped with ATE brake systems. Cross-reference part numbers include ATE 390479 and OEM equivalents 251 611 243, 251.611.243, and 944 355 819 00.