Dorman M390007 Brake Master Cylinder

Overview of the Dorman Brake Master Cylinder M390007

The Dorman Brake Master Cylinder M390007 is designed specifically for select Nissan and INFINITI models, including the Altima and G20. This brake hydraulics component ensures reliable brake fluid pressure and smooth braking performance for your vehicle.

• Master cylinder bore diameter: 0.938 inches
• Constructed from durable aluminum material
• Includes reservoir for brake fluid
• Equipped with a sensor for monitoring brake system status
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M390007 brake master cylinder is engineered with a 0.938-inch bore diameter to provide precise hydraulic pressure control. Its aluminum construction offers corrosion resistance and long-lasting durability under demanding brake system conditions. The included reservoir allows for proper brake fluid storage and circulation, while the integrated sensor helps monitor brake fluid levels or pressure, contributing to vehicle safety. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder is compatible with the brake hydraulics systems of Nissan Altima and INFINITI G20 models. Note that mounting hardware is not included, so ensure you have the necessary components for installation.

Compatible Vehicles and Applications

This brake master cylinder is compatible with the following vehicles:

• Nissan Altima (specific model years may vary; verify fitment before purchase)
• INFINITI G20

Use the Dorman M390007 to replace a failing or leaking master cylinder in these vehicles to restore proper brake function.

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Brake fluid leaks from the master cylinder reservoir or outlets
• Loss of hydraulic pressure causing reduced braking efficiency
• Faulty brake fluid level sensor triggering warning lights
• Corrosion or wear in the master cylinder bore affecting brake response

Installation Notes and Tips

• Verify vehicle compatibility with Nissan Altima or INFINITI G20 before installation
• Ensure brake fluid reservoir is properly filled and free of contaminants
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate tools for M10 x 1.0 threaded outlets to avoid damage
• Mounting hardware is not included; retain or purchase necessary bolts and fittings separately

Quality Assurance and Warranty

Dorman manufactures the M390007 brake master cylinder to meet or exceed OEM specifications for fit and function. The aluminum construction and integrated sensor contribute to reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.