Dorman M390042 Brake Master Cylinder
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Dorman

Dorman M390042 Brake Master Cylinder

Brand Dorman M390042
Mounting Hardware Included No
Master Cylinder Bore Diameter 1
Master Cylinder Material Aluminum
Reservoir Included Yes
Secondary Outlet Thread Diameter 10
Sensor Included Yes
Number of Outlets 2
Package Contents Master cylinder
Rearward Outlet Size M12 x 1.0
Thread Pitch 1.0
Fits Acura · 15 vehicles

OE-style replacement. Matches original design, function, and performance for the listed application.

Aluminum construction. Lightweight housing built from new, high-quality materials.

Complete assembly. Includes reservoir and sensor for a streamlined master cylinder replacement.

Cross-references Cardone New 13-2800, Centric Parts 130.40028 and Dixie Electric Ltd 12866 for the same application. See all 13.

$291.01Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $291.01
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Brake Master Cylinder for Acura NSX

This Dorman brake master cylinder is built for specific Acura NSX applications and matches the original unit’s design, function, and performance. It uses new materials for a durable replacement and includes an integrated reservoir and sensor.

Key Features

  • Precision-engineered brake master cylinder for direct replacement use.
  • 1-inch bore diameter for the specified application.
  • Aluminum construction for a lightweight, corrosion-resistant housing.
  • Two outlet design with M12 x 1.0 rearward outlet and 10 mm secondary outlet thread.
  • Reservoir and sensor included for a complete master cylinder assembly.

Detailed Description

Part number M390042 is a brake master cylinder for the 1991-2005 Acura NSX. It is engineered to replicate the original master cylinder’s fit and function while using new, high-quality materials for dependable service. The aluminum body, 1-inch bore, and dual-outlet layout support the hydraulic requirements of the braking system, and the included reservoir and sensor simplify replacement of the master cylinder assembly. This part number, M390042, is a direct-fit solution for Acura NSX brake hydraulic service.

Common Issues It Can Address

  • Brake pedal travel that feels excessive or inconsistent.
  • Loss of hydraulic pressure in the brake system.
  • Fluid leakage from the master cylinder assembly.
  • Brake warning light concerns related to the master cylinder sensor.

Installation Notes and Tips

Verify bore diameter, outlet thread sizes, and reservoir configuration before installation. This application notes compatibility with 1-inch bore drum brake wheel cylinders. Mounting hardware is not included. Bleed the brake system thoroughly after installation and confirm all hydraulic connections are sealed before returning the vehicle to service.

Quality Assurance

Dorman designs this master cylinder to match original equipment form and function for the listed application. New materials are used to support safe, durable brake system replacement.

Related reading

This part fits 15 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelNotes
2005AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
2004AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
2003AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
2002AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
2001AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
2000AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1999AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1998AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1997AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1996AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1995AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1994AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1993AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1992AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
1991AcuraNSXCompatible with 1-inch bore drum brake wheel cylinders.
Directly replaces or cross-references 13 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Cardone New — 13-2800Centric Parts — 130.40028Dixie Electric Ltd — 1286611-280018M577072-927583-0802846100SL0952F142387M-54028M900785MC390042MC509780