MPA Electrical NM51551 Brake Master Cylinder

Brake Master Cylinder for OE-Style Replacement

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM51551. It is a standard replacement unit built with a 0.75-inch bore and cast iron construction for vehicles that use front drum brakes.

Compatible With Volkswagen Beetle and Volkswagen Karmann Ghia applications that require this brake master cylinder configuration, NM51551 is engineered to match OE specifications using tested manufacturing processes and controlled inspection protocols.

Key Features

• Brand: MPA Electrical
• Part number: NM51551
• Brake master cylinder for brake hydraulics service
• 0.75-inch bore diameter
• Cast iron master cylinder body
• Standard replacement grade
• New condition
• Two mounting holes with 0.313-inch mounting hole diameter
• Brand line: New with front drum brakes

Detailed Description

NM51551 is a brake master cylinder built for front drum brake applications where a direct hydraulic replacement is needed. The cast iron housing and 0.75-inch bore support stable brake pressure delivery, while the OE-based testing process helps ensure the unit matches original specifications before installation. This part number NM51551 is a practical choice for Volkswagen Beetle and Volkswagen Karmann Ghia brake system repair when the original master cylinder is worn, leaking, or no longer holding pressure.

The MPA Electrical brand line, New with front drum brakes, identifies this unit as part of a product group focused on vehicles equipped with front drum brake setups. That makes it a relevant search match for buyers looking for a Volkswagen Beetle brake master cylinder or Volkswagen Karmann Ghia brake master cylinder with the correct hydraulic configuration.

This part cross-references 113611015BH and 171611015BH for the same application.

What It Helps Fix

• Low or sinking brake pedal feel
• External brake fluid leakage at the master cylinder
• Uneven or delayed hydraulic brake response
• Brake warning symptoms caused by master cylinder wear
• Loss of braking performance from internal seal failure

Installation Notes and Tips

Verify bore size, mounting hole spacing, and brake system layout before installation. This master cylinder does not include mounting hardware, reservoir, cap, push rod, gasket or seal, brake booster, sensor, or brake pressure switch, so reuse or source the required related components as needed. Bleed the brake system thoroughly after installation and inspect all hydraulic connections for leaks.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict inspection protocols. That approach supports consistent out-of-box brake performance for service replacement applications.