Metelli 05-0734 Brake Master Cylinder

Brake Master Cylinder for Mazda 6

Metelli New Master Cylinder 05-0734 is a new brake master cylinder built with an aluminium housing and a 20.64 mm bore diameter. It is listed for 2003-2005 Mazda 6 applications and is a direct-fit hydraulic brake component for restoring consistent pedal response.

Key Features

• Brand: Metelli
• Brand line: New Master Cylinder
• Part number: 05-0734
• Aluminium housing for lightweight corrosion resistance
• 20.64 mm master cylinder bore diameter
• Reservoir not included
• New condition
• Fits 2003-2005 Mazda 6, N/A

Product Details

The Metelli New Master Cylinder line focuses on replacement hydraulic brake components for service work where bore size, mounting, and fluid control must match the original system. This 05-0734 master cylinder is specified for Mazda 6 models from 2003 through 2005 and is identified by interchange references including Dayco 71560 and OE-style cross references such as GJ6L-43-40Z and PF-344. If you are searching for a brake master cylinder for a 2003 Mazda 6, 2004 Mazda 6, or 2005 Mazda 6, this part number should be matched to the vehicle’s brake system specifications before installation.

Common Problems This Part Can Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Brake fluid bypass causing reduced braking response
• Pedal travel that increases over time
• Brake system performance loss from a worn hydraulic bore

Installation Notes and Tips

Confirm the 20.64 mm bore diameter and reservoir configuration before ordering. Bench bleed the master cylinder before final installation, then bleed the brake system thoroughly after mounting. Inspect brake lines, fittings, and fluid condition during service to help prevent contamination from entering the hydraulic system. Verify fitment against the existing part number 05-0734 and the vehicle’s brake hardware before completing the repair.

Quality Assurance

Metelli supplies replacement brake hydraulics under its New Master Cylinder product line, with this unit manufactured as a new aluminium master cylinder for the listed Mazda 6 applications. Cross-reference part numbers include Dayco 71560 and OE-style references such as GJ6L-43-40Z.