Dorman M630191 Brake Master Cylinder

Reliable Brake Master Cylinder for Hyundai Optima and Kia Sonata

The Dorman M630191 brake master cylinder is engineered to restore proper brake hydraulics in select Hyundai and Kia vehicles. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and responsive braking performance.

Key Features of the Dorman M630191 Brake Master Cylinder

• Master cylinder bore diameter of 0.938 inches for accurate hydraulic control
• Constructed from durable aluminum material for corrosion resistance and longevity
• Includes an integrated reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Features four outlets with rearward outlet sizes of M10 x 1.0 and M16 x 1.5 threads
• Compatible with Hyundai Optima and Kia Sonata models

Detailed Product Description

The Dorman M630191 brake master cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Its 0.938-inch bore diameter is designed to match OEM specifications, ensuring proper fluid displacement and brake response. Made from aluminum, this master cylinder offers enhanced resistance to rust and wear, contributing to a longer service life. The included reservoir allows for efficient brake fluid management, while the integrated sensor provides real-time feedback to the vehicle’s brake system. With four outlets and specific rearward outlet thread sizes (M10 x 1.0 and M16 x 1.5), this part is engineered to fit precisely within the brake lines of Hyundai Optima and Kia Sonata vehicles.

Common Brake Issues Addressed by This Master Cylinder

• Spongy or unresponsive brake pedal feel
• Brake fluid leaks from the master cylinder or reservoir
• Brake warning light activation due to sensor faults
• Uneven braking or reduced stopping power
• Brake pedal sinking or failure to maintain pressure

Installation Notes and Tips

Installation of the Dorman M630191 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. It is important to verify compatibility with your specific Hyundai Optima or Kia Sonata model year before installation. Since mounting hardware is not included, retain original fasteners or source appropriate replacements. Handle the aluminum component carefully to avoid damage during installation.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The use of aluminum material and integrated sensor reflects a focus on durability and system integration. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship.