MPA Electrical NM4230 Brake Master Cylinder

Brake Master Cylinder for Nissan Maxima and Altima

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built as a standard replacement for front disc brake applications, it is engineered for direct-fit service on select Nissan Maxima and Nissan Altima models.

MPA Electrical’s New with front disc brakes product line focuses on replacement parts that are tested against OE specifications for dependable braking performance right out of the box. Part number NM4230 is a practical choice when replacing a worn or leaking master cylinder on a Nissan Maxima or Altima.

• Brand: MPA Electrical
• Part number: NM4230
• Brake master cylinder for front disc brake applications
• Aluminum master cylinder body with plastic reservoir
• Reservoir included with cap and gasket/seal included
• 0.938 in. bore diameter
• DOT 3 fluid type
• Standard replacement grade
• 2 mounting holes; mounting hardware not included
• New product condition

Detailed Product Overview

This brake master cylinder is built to restore hydraulic pressure in the braking system by converting pedal force into brake fluid pressure. It features an aluminum housing, integrated reservoir, and a 0.938-inch bore diameter to match the specified OE-style application. Part number NM4230 is listed as a cross-reference for 46010-JA02A for the same application.

Compatible With 2009-2014 Nissan Maxima, N/A and 2007-2013 Nissan Altima, N/A with front disc brakes. Use this replacement when servicing a vehicle that needs a new master cylinder assembly for consistent brake pedal feel and hydraulic performance.

What It Helps Address

• Low or inconsistent brake pedal pressure
• Brake fluid leakage at the master cylinder
• Internal seal wear that affects hydraulic performance
• Soft or sinking brake pedal feel
• Reduced braking response in front disc brake systems

Installation Notes and Tips

Verify the bore diameter, mounting hole layout, and reservoir configuration before installation. This unit includes the reservoir, cap, and gasket/seal, but does not include mounting hardware, brake booster, push rod, sensor, or brake pressure switch. Always bleed the brake system thoroughly after installation and fill with DOT 3 brake fluid only.

Quality Assurance

MPA Electrical tests each master cylinder against OE specifications using controlled inspection and validation processes based on a large OE sample library. That approach helps ensure consistent fit and braking performance for the listed Nissan applications.