Dorman M390233 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan Maxima and Infiniti I30

The Dorman M390233 brake master cylinder is engineered to restore proper brake hydraulics for Nissan Maxima and Infiniti I30 models. Designed with precision, this master cylinder includes a reservoir and sensor to ensure optimal brake system performance.

• Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir and sensor for complete brake system integration
• Two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter 10 mm
• Thread pitch of 1.0 for secure fitting
• Mounting hardware not included

Detailed Product Description

The Dorman M390233 brake master cylinder is specifically designed for use in Nissan Maxima and Infiniti I30 vehicles, providing a precise fit and reliable brake hydraulics. Its aluminum construction offers durability and resistance to corrosion, which is essential for maintaining brake system integrity over time. The included reservoir allows for proper brake fluid storage, while the integrated sensor supports brake system monitoring. With a bore diameter of 0.938 inches, this master cylinder delivers consistent hydraulic pressure to the brake calipers or wheel cylinders. Featuring two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10 mm thread diameter, it ensures compatibility with the vehicle’s brake lines. The thread pitch of 1.0 guarantees a secure and leak-free connection.

Common Applications and Issues Addressed

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from faulty seals or cracks
• Resolves spongy or unresponsive brake pedal feel
• Replaces master cylinder with faulty sensor for accurate brake system feedback
• Addresses brake system failure caused by internal component wear

Installation Notes and Tips

• Ensure brake fluid reservoir is properly filled before installation
• Bleed the brake system thoroughly after installation to remove air
• Verify thread pitch and outlet sizes match vehicle brake lines
• Use appropriate tools to avoid damaging aluminum surfaces
• Mounting hardware is not included; reuse existing hardware or source separately

Quality Assurance and Warranty

Dorman manufactures the M390233 brake master cylinder to meet or exceed OEM specifications for Nissan Maxima and Infiniti I30 models. The aluminum construction and integrated sensor contribute to long-lasting performance. While mounting hardware is not included, the part is designed for straightforward installation with proper preparation. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.