Dorman M390370 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford Taurus and Mercury Sable

The Dorman M390370 brake master cylinder is designed to restore proper brake hydraulics in select Ford and Mercury vehicles. Engineered with an aluminum body and integrated reservoir, this master cylinder ensures consistent brake fluid delivery for safe stopping performance.

• Master cylinder bore diameter: 1 inch
• Constructed from durable aluminum material
• Includes reservoir and sensor for fluid level monitoring
• Two outlet ports with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Thread pitch of 1.0 for secure fitting
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

This Dorman brake master cylinder (part number M390370) is specifically compatible with Ford Taurus and Mercury Sable models. The aluminum construction provides corrosion resistance and long service life. The included reservoir allows for proper brake fluid storage, while the integrated sensor helps monitor fluid levels to alert drivers of low brake fluid conditions. Featuring two outlets, the master cylinder supports dual-circuit brake systems, with precise thread sizes (M10 x 1.0 rearward outlet and M12 x 1.0 secondary outlet) to ensure a secure and leak-free connection.

Common Applications and Problem Resolution

• Restores brake pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake warning light activation due to faulty fluid level sensor
• Improves brake system reliability in Ford Taurus and Mercury Sable models
• Resolves inconsistent brake pedal travel or poor stopping performance

Installation Notes and Tips

Installation of the Dorman M390370 master cylinder requires proper brake system bleeding to remove air and ensure optimal brake function. Mounting hardware is not included, so reuse existing hardware or acquire appropriate fasteners. Verify thread pitch and outlet sizes to match vehicle brake lines. It is recommended to inspect related brake components during installation for overall system integrity.

Quality Assurance and Warranty

Dorman brake master cylinders are manufactured to meet or exceed OEM specifications for fit and function. The M390370 part undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship to provide confidence in product reliability.