Dorman M630040 brake master cylinder for the 2000-2003 Buick LeSabre and other vehicles turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder is made entirely of new materials.
- Part of the Dorman First Stop line
- Aluminum body with a 1 in bore diameter
- Two outlets with M14 x 1.5 thread
- Rubber components made of EPDM compound for resistance to glycol-based brake fluid
- Made to meet SAE International standards
Quick facts
- Part: Dorman M630040 brake master cylinder
- Fits: 2000-2003 Buick LeSabre and other vehicles
- Material: Aluminum
- Condition: New
A soft or sinking pedal, or fluid seeping around the cylinder, can mean the master cylinder is wearing out. A leaking line, a sticking caliper or a worn hose can be behind the same signs, so find the cause before you buy. One master cylinder is needed per vehicle.
Fits
The 2000-2003 Buick LeSabre, the 2001-2003 Oldsmobile Aurora and the 2000-2003 Pontiac Bonneville take this master cylinder, and so do other vehicles. If your car is not named here, look it up in the "Vehicles it fits" section.
Specifications
Fit and size
- Bore diameter: 1 in
- Number of outlets: 2
- Rearward outlet size: M14 x 1.5
- Secondary outlet thread diameter: M14 x 1.5
- Primary outlet thread pitch: 1.5 mm
- Quantity per vehicle: 1
Build and materials
- Material: Aluminum
- Condition: New
- Country of origin: China
In the box
One master cylinder with its reservoir and sensor. Mounting hardware is not included, and the old hardware may not be reusable, so plan on new pieces.
Interchange: 174-1002 · 100-2334 · M-82114 · 13-2918 · 10-2918 · 130.62120 · 131.62120 · 355-45017
M901250 · 13598 · MC500210 · 18040242 · 18045192 · 18047787 · M3084 · NM3084 · MC390552 · F140902 · MC140902
This part cross-references / interchanges with the following part numbers:
174-1002, M901250, 100-2334, M-82114, 13598, 13-2918, 10-2918, 130.62120, 131.62120, MC500210, 355-45017, 18040242, 18045192, 18047787, M3084, NM3084, MC390552, F140902, MC140902
Frequently Asked Questions
Is this the Buick LeSabre brake master cylinder for 2000-2003 models?
Yes, Dorman M630040 fits the 2000-2003 Buick LeSabre; for another car, look it up in the "Vehicles it fits" section.
Is this Dorman master cylinder sold with the reservoir and sensor?
Yes, Dorman M630040 comes with its reservoir and sensor, but mounting hardware is not included.
What brake fluid are the rubber parts in this master cylinder made for?
All the rubber components are made of EPDM compound, which resists glycol-based brake fluid.
Can a soft brake pedal mean the aluminum master cylinder is worn?
Yes, a soft pedal can be a sign of a worn master cylinder, and so can fluid seeping around the cylinder body. A shop can test the system, so have the brakes checked promptly.
What thread size are the outlets on the M630040 master cylinder?
Dorman M630040 has two outlets. The rearward and secondary outlets are M14 x 1.5, the primary outlet thread pitch is 1.5 mm, and the bore is 1 in.
