Dorman M630783 brake master cylinder for the 2004-2006 Lexus LS430 turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder is made entirely of new materials and precision-engineered to match the design, function and performance of the original.
- Part of the Dorman First Stop line
- Aluminum cylinder housing with casting material matched to the part it replaces
- All rubber components are made of EPDM compound for resistance to glycol-based brake fluid
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630783 brake master cylinder
- Fits: 2004-2006 Lexus LS430
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, a brake warning light or fluid loss at the cylinder can mean the master cylinder is worn, though a leaking brake hose or caliper can be behind the same signs, so find the cause before replacing it.
Fits
This master cylinder is a direct-fit replacement for the 2004-2006 Lexus LS430, and that car takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 0.938 in
- Number of outlets: 2
- Rearward outlet size: M10 x 1.0
- Secondary outlet thread diameter: M10 x 1.0
- Primary outlet thread pitch: 1 mm
Build and materials
- Material: Aluminum
- Reservoir: single, included
- Sensor: included
- Condition: New
- Country of origin: China
In the box
One master cylinder with its reservoir and sensor. Mounting hardware is not included, so plan on new fasteners, since the old ones may not be reusable.
Interchange: 100-1555 · 13-3407 · 11-3407 · 130.44038 · 355-75015
NM55526 · MC391062 · 4720150290 · F143272 · MC143272
This part cross-references / interchanges with the following part numbers:
100-1555, 13-3407, 11-3407, 130.44038, 355-75015, NM55526, MC391062, 4720150290, F143272, MC143272
Frequently Asked Questions
Will Dorman M630783 fit the 2004-2006 Lexus LS430?
Yes. Dorman M630783 is a direct-fit replacement for the 2004-2006 Lexus LS430, and that car takes one.
Does the Dorman master cylinder come with the reservoir?
Yes. The master cylinder comes with its single reservoir and a sensor. Mounting hardware is not included.
What is the Dorman M630783 made of?
Dorman M630783 has an aluminum housing. All of its rubber components are EPDM compound, chosen for resistance to glycol-based brake fluid.
What bore size and outlet thread does this master cylinder have?
The bore diameter is 0.938 in. It has 2 outlets threaded M10 x 1.0, with a 1 mm primary outlet thread pitch.
Does this brake master cylinder meet SAE standards?
Yes. It is made to meet rigorous SAE International standards and is made entirely of new materials.
