HomeBrake > Brake HydraulicsDorman M630300 Brake Master Cylinder
Part #: M630300

Dorman M630300 Brake Master Cylinder

N/A
2 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$123.11Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Toyota, RAV4
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Brake Master Cylinder for Toyota RAV4

The Dorman M630300 Brake Master Cylinder is engineered to restore proper brake hydraulics for Toyota RAV4 models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.

  • Master cylinder bore diameter: 20.68 mm for accurate hydraulic pressure
  • Constructed from durable aluminum material
  • Includes reservoir for fluid storage
  • Equipped with sensor for brake system monitoring
  • Two outlets 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

Product Details and Specifications

The Dorman M630300 brake master cylinder is specifically designed for Toyota RAV4 vehicles, providing a precise fit and reliable function. Its 20.68 mm bore diameter ensures proper hydraulic pressure is maintained within the brake system. The aluminum construction offers corrosion resistance and durability under typical operating conditions. This master cylinder comes with an integrated reservoir to hold brake fluid and a sensor to monitor system status, supporting safe and effective braking. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, it facilitates proper brake line connections. Note that mounting hardware is not included, so existing hardware or separate purchase may be necessary.

Common Applications and Problem Resolution

  • Restores brake pressure loss due to worn or damaged master cylinder
  • Eliminates brake fluid leaks from a faulty reservoir or seals
  • Resolves brake warning light issues related to sensor failure
  • Improves brake pedal feel and responsiveness
  • Addresses uneven braking caused by hydraulic inconsistencies

Installation Notes and Tips

Installation of the Dorman M630300 master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Since mounting hardware is not included, verify compatibility with existing components before installation. It is recommended to inspect brake lines and related components during replacement to maintain system integrity. Follow manufacturer torque specifications for outlet fittings to prevent leaks.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The M630300 brake master cylinder undergoes rigorous quality control to ensure durability and reliability. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation for exact warranty terms.

BrandDorman
Part NumberM630300
Master Cylinder Bore Diameter20.68
Master Cylinder MaterialAluminum
Mounting Hardware IncludedNo
Number of Outlets2
Package ContentsMaster Cylinder
Rearward Outlet SizeM10 X 1.0
Reservoir IncludedYes
Secondary Outlet Thread Diameter10
Sensor IncludedYes
Thread Pitch1.0

This part fits 2 vehicles. Search below:

YearMakeModelTransmissionPositionNotes
2005ToyotaRAV4AutomaticN/ABore size 20.68 mm; includes Vehicle Stability Control.
2004ToyotaRAV4AutomaticN/ABore size 20.68 mm; includes Vehicle Stability Control.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

11-321413-3214130.44918138544720142260F142316MC390833

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.