MPA Electrical NM4238 Brake Master Cylinder

Brake Master Cylinder for Scion tC

Restore consistent brake pedal response with this MPA Electrical brake master cylinder for the Scion tC. Built as a standard replacement for vehicles with front disc brakes, part NM4238 is engineered for direct hydraulic performance and OE-style fitment on 2005-2010 Scion tC applications.

MPA Electrical’s New with front disc brakes product line focuses on replacement brake hydraulics for specific vehicle configurations. This NM4238 master cylinder is built from aluminum, uses a 0.813-inch bore diameter, and includes a gasket or seal for service-ready installation.

Key Features

• Standard replacement brake master cylinder
• Fits 2005-2010 Scion tC, front disc brakes
• Aluminum master cylinder construction
• 0.813-inch bore diameter
• Two mounting holes with 0.349-inch mounting hole diameter
• Gasket or seal included
• New condition
• Part number NM4238

Detailed Description

Part NM4238 is a brake master cylinder for the Scion tC that matches the vehicle’s front disc brake configuration. It is built as a standard replacement unit to help restore hydraulic pressure transfer from the brake pedal to the braking system. The aluminum body supports a lightweight, corrosion-resistant design, while the 0.813-inch bore diameter helps maintain the correct hydraulic characteristics for the application. This part cross-references Toyota OE numbers 4720121080 and 4722021030 for the same application.

What It Helps Solve

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the master cylinder
• Reduced hydraulic pressure to the brake system
• Brake performance issues on 2005-2010 Scion tC models with front disc brakes

Installation Notes and Tips

Verify the vehicle is a 2005-2010 Scion tC with front disc brakes before installation. This master cylinder does not include the reservoir, cap, brake booster, push rod, mounting hardware, or brake pressure switch. Inspect the brake lines, seals, and booster interface during replacement, and bench bleed the master cylinder before final installation to help remove trapped air from the hydraulic system.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled procedures and reference samples from its OE library. That process helps ensure consistent hydraulic performance and proper fitment for the intended application.