MPA Electrical NM4323 Brake Master Cylinder

Brake Master Cylinder for Ram ProMaster City

Restore consistent brake pedal response with this MPA Electrical brake master cylinder for the Ram ProMaster City. Built as a standard replacement for 2015-2022 models with front disc brakes, Part Number NM4323 is engineered to match OE specifications for dependable hydraulic performance.

MPA Electrical uses OE sample data and controlled testing to verify each unit against original equipment requirements, helping deliver predictable braking performance after installation. This NM4323 master cylinder is a direct-fit hydraulic replacement for Ram ProMaster City brake service.

Key Features

• Fits 2015-2022 Ram ProMaster City, front disc brakes
• Standard replacement brake master cylinder
• Aluminum master cylinder body
• 1.063 in. bore diameter
• 2 mounting holes with 0.345 in. mounting hole diameter
• Gasket or seal included
• New condition
• Part Number: NM4323

Product Details

This brake master cylinder is built for hydraulic brake system restoration on the Ram ProMaster City. The aluminum construction supports a lightweight OE-style replacement design, while the 1.063-inch bore diameter and two-hole mounting pattern align with the specified application. Part Number NM4323 is also a cross-reference for 68269712AA for the same application.

The MPA Electrical New with front disc brakes product line focuses on application-specific brake hydraulics for vehicles that require a direct replacement master cylinder. For Ram ProMaster City brake repair, NM4323 provides a practical option when the original master cylinder shows internal leakage, pedal fade, or inconsistent hydraulic pressure.

Common Issues This Part Can Address

• Low or sinking brake pedal
• Internal master cylinder fluid bypass
• Uneven or inconsistent brake pressure
• Brake fluid leakage at the master cylinder
• Reduced braking response during normal driving

Installation Notes

• Reservoir, cap, push rod, brake booster, sensor, and mounting hardware are not included.
• Verify bore diameter, mounting hole spacing, and brake system configuration before installation.
• Bench bleeding is typically required before bleeding the brake system.
• Inspect brake lines, seals, and fluid condition during replacement.
• Confirm fitment for 2015-2022 Ram ProMaster City models with front disc brakes only.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict inspection protocols. That validation helps ensure consistent braking performance out of the box for the Ram ProMaster City application covered by NM4323.