MPA Electrical NM55131A Brake Master Cylinder

Brake Master Cylinder for Acura CL and Isuzu Oasis

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55131A. It is a standard replacement master cylinder for 1998-1999 Acura CL and 1998-1999 Isuzu Oasis models with front disc brakes.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulic replacements for specific vehicle applications, helping match OE-style fitment and braking performance requirements.

Key Features

• Brake master cylinder for brake hydraulic service
• Fits 1998-1999 Acura CL, front disc brakes
• Fits 1998-1999 Isuzu Oasis, front disc brakes
• Aluminum master cylinder body with plastic reservoir
• 1-inch bore diameter for the specified application
• Reservoir and cap included
• Uses DOT 3 or DOT 4 brake fluid
• Standard replacement grade
• New condition

Detailed Description

The NM55131A brake master cylinder is engineered to restore braking performance by replacing a worn or leaking hydraulic unit with a direct-fit standard replacement. MPA Electrical tests each unit against OE specifications using controlled processes and sample-based reference data to help maintain consistent pedal feel and hydraulic operation. This part number NM55131A is built with an aluminum master cylinder body, plastic reservoir, and a 1-inch bore diameter for the listed Acura CL and Isuzu Oasis applications.

For fitment-specific searches, this brake master cylinder fits 1998-1999 Acura CL, front disc brakes, and fits 1998-1999 Isuzu Oasis, front disc brakes. It is a practical choice when replacing a failing master cylinder on these vehicles and when matching the original brake hydraulic layout is important.

This part cross-references Honda/Acura OE numbers 46100SY8A51 and 46100SY8A52 for the same application.

What It Helps Solve

• Low or inconsistent brake pedal feel
• Internal master cylinder fluid bypass
• External brake fluid leakage at the master cylinder
• Brake warning concerns related to hydraulic pressure loss
• Reduced braking response from a worn hydraulic unit

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and brake configuration before installation. Bench bleed the master cylinder before connecting brake lines, then bleed the full brake system after installation to remove trapped air. Inspect the brake booster, lines, and fluid condition during service, and use DOT 3 or DOT 4 brake fluid as specified.

Quality Assurance

MPA Electrical uses OE sample references and strict testing protocols to verify master cylinder performance against OE specifications before release. The result is a new brake master cylinder built for the listed Acura CL and Isuzu Oasis applications with consistent hydraulic operation out of the box.