Dorman M390335 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, Geo, and Suzuki

The Dorman M390335 Brake Master Cylinder is engineered to restore proper brake hydraulics in Chevrolet Sidekick, Geo Tracker, and Suzuki X-90 models. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter: 0.938 inches for accurate fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Features three outlets with a secondary outlet thread diameter of 10 mm
• Rearward outlet size: M10 x 1.0 with a thread pitch of 1.0
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390335 master cylinder is crafted from aluminum, providing a lightweight yet sturdy component that resists corrosion and wear. Its 0.938-inch bore diameter is designed to match the hydraulic requirements of the Chevrolet Sidekick, Geo Tracker, and Suzuki X-90 brake systems. The included reservoir allows for proper brake fluid containment, while the integrated sensor helps maintain system monitoring and safety. With three outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, this master cylinder supports the complex brake line configurations found in these vehicles.

Compatible Vehicles and Applications

This brake master cylinder is compatible with the following vehicles:

• Chevrolet Sidekick
• Geo Tracker
• Suzuki X-90

It is designed specifically for brake hydraulic systems requiring a master cylinder with these dimensions and outlet configurations.

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Loss of brake fluid pressure affecting stopping power
• Brake warning light activation related to sensor failure
• Corrosion or wear in the original master cylinder causing brake fluid contamination
• Inadequate fluid reservoir capacity leading to brake system malfunction

Installation Notes and Tips

• Ensure brake system is fully depressurized before removal
• Bleed the brake lines thoroughly after installation to remove air
• Verify thread pitch and outlet sizes match vehicle specifications
• Use appropriate brake fluid as recommended by the vehicle manufacturer
• Mounting hardware is not included; retain original hardware or source compatible replacements

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.