Dorman M390285 Brake Master Cylinder

Reliable Brake Master Cylinder for Toyota Tacoma

The Dorman M390285 brake master cylinder is designed specifically for Toyota Tacoma models, providing precise hydraulic control for your vehicle's braking system. Engineered with durable aluminum construction and equipped with a reservoir and sensor, this master cylinder ensures consistent brake performance.

• Master cylinder bore diameter: 1 inch for accurate hydraulic pressure
• Constructed from lightweight, corrosion-resistant aluminum
• Includes reservoir for fluid storage and monitoring
• Equipped with a sensor for brake system feedback
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0

Product Details and Specifications

The Dorman M390285 brake master cylinder features a 1-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system of Toyota Tacoma vehicles. Its aluminum material offers strength and resistance to corrosion, extending the part's service life. The included reservoir allows for brake fluid storage and easy monitoring, while the integrated sensor provides real-time feedback to the vehicle’s brake system. This master cylinder has two outlets, with a secondary outlet thread diameter of 10 mm and a rearward outlet size of M10 x 1.0, ensuring compatibility with the brake lines on the Tacoma. Note that mounting hardware is not included with this part.

Compatible Applications and Common Repairs

• Replacement for worn or leaking brake master cylinders on Toyota Tacoma
• Fixes issues related to low brake fluid pressure or brake pedal sinking
• Resolves brake warning light activation due to sensor faults
• Addresses brake fluid reservoir leaks or damage
• Restores proper brake hydraulic function for safe stopping

Installation Notes and Tips

When installing the Dorman M390285 brake master cylinder on a Toyota Tacoma, ensure the brake fluid reservoir is properly filled and free of contaminants. Bleed the brake system thoroughly to remove air and verify sensor connections for accurate brake system monitoring. Since mounting hardware is not included, retain or source the necessary bolts and fittings before installation. Follow manufacturer torque specifications to avoid damage to the aluminum housing or brake lines.

Quality Assurance and Warranty

Dorman brake master cylinders are manufactured to meet or exceed OEM standards for fit, form, and function. The M390285 part undergoes rigorous quality control to ensure reliable performance in Toyota Tacoma brake systems. Please refer to Dorman’s warranty policy for coverage details, which typically includes protection against defects in materials and workmanship.