MPA Electrical NM55040 Brake Master Cylinder

Brake Master Cylinder for Tracker and Sidekick

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 to match OE specifications for dependable hydraulic performance on select Chevrolet Tracker, Suzuki Sidekick, Geo Tracker, and Pontiac Sunrunner models.

Key Features

• Brand: MPA Electrical
• Part number: NM55040
• Brake master cylinder with 0.875 bore diameter
• Aluminum master cylinder body with plastic reservoir
• Reservoir included with cap and gasket/seal included
• Uses DOT 3 brake fluid
• New condition, standard replacement grade
• Mounting hole quantity: 2

Product Details

MPA Electrical NM55040 is a brake master cylinder built to restore hydraulic braking performance on vehicles equipped with front disc brakes. The aluminum construction helps provide a durable replacement foundation, while the included reservoir, cap, and seal support a complete service-ready assembly. Each unit is tested against OE specifications using controlled processes and sample-based validation to help deliver consistent brake feel and fluid control right out of the box. This part cross-references 5110056B10 and 91172675 for the same application.

The MPA Electrical New with front disc brakes product line focuses on replacement brake hydraulics for vehicles that need OE-style fit and function. For shoppers searching for a brake master cylinder for 1998 Chevrolet Tracker, 1996-1998 Suzuki Sidekick, or 1996-1997 Geo Tracker, NM55040 is a direct-match option for the listed configurations.

What It Helps Fix

• Low or inconsistent brake pedal pressure
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the master cylinder assembly
• Soft or spongy pedal feel during braking
• Reduced braking response on front disc brake systems

Installation Notes

Verify bore diameter, mounting hole spacing, and reservoir configuration before installation. This master cylinder does not include a brake booster, push rod, mounting hardware, mounting bracket, sensor, or brake pressure switch. Bench bleeding is recommended before final installation, and the system should be filled with DOT 3 brake fluid only. Confirm vehicle-specific fitment for 1998 Chevrolet Tracker, 1996-1998 Suzuki Sidekick, 1996-1997 Geo Tracker, and 1996-1997 Pontiac Sunrunner with 2 doors and non-ABS.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary procedures and strict protocols to support consistent braking performance. NM55040 is a new standard replacement part built for direct service use on the listed applications.