Dorman M630839 brake master cylinder for the 2011-2020 Dodge Grand Caravan and other vehicles turns pedal force into hydraulic pressure for the brakes.
- Part of the Dorman First Stop line
- Aluminum cylinder housing, with the casting material matched for similar performance
- All rubber components are EPDM compound for resistance to glycol-based brake fluid
- Made entirely of new materials
- Made to meet SAE International standards
Quick facts
- Part: Dorman M630839 brake master cylinder
- Fits: 2011-2020 Dodge Grand Caravan and other vehicles
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, fluid around the cylinder or a brake warning light can mean the master cylinder is wearing out. Those signs alone do not prove it, because a leaking brake hose can also give a low pedal.
Fits
This master cylinder is a direct-fit replacement for the 2011-2020 Dodge Grand Caravan, the 2011-2016 Chrysler Town & Country and the 2012-2014 Ram C/V, and its design, function and performance follow the original master cylinder on these vehicles. The 2011-2020 Dodge Grand Caravan takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1.063 in
- Number of outlets: 2
- Rearward outlet thread: 7/16-24
- Secondary outlet thread diameter: 7/16-24
Build and materials
- Housing material: Aluminum
- Rubber components: EPDM compound
- Condition: New
- Standards: SAE International
- Country of origin: China
In the box
One master cylinder. Mounting hardware, the reservoir and the sensor are not included, so plan on new mounting hardware, since the old pieces may not be reusable.
Interchange: 100-4026 · 10-4568 · 130.67050 · 355-40086
4581491AA · 4581491AB · 4581491AC · 4581491AD · NM4318 · MC391424 · R144568
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
100-4026, 10-4568, 130.67050, 4581491AA, 4581491AB, 4581491AC, 4581491AD, 355-40086, NM4318, MC391424, R144568
Frequently Asked Questions
Is the Dorman M630839 the right brake master cylinder for a 2011-2020 Dodge Grand Caravan?
Yes. Dorman M630839 fits the 2011-2020 Dodge Grand Caravan, and also the 2011-2016 Chrysler Town & Country and the 2012-2014 Ram C/V.
Does this brake master cylinder come with a reservoir or mounting hardware?
No. The box holds the master cylinder only; the reservoir, mounting hardware and sensor are not included.
What are the bore diameter and outlet thread size of the Dorman M630839?
Dorman M630839 has a 1.063 in bore and 2 outlets. The rearward and secondary outlets are both 7/16-24.
Are the rubber parts in this aluminum master cylinder made for glycol-based brake fluid?
Yes. All rubber components are EPDM compound for resistance to glycol-based brake fluid, and the housing is aluminum.
Does the Dorman M630839 replace number 4581491AA?
Yes. 4581491AA is one of the numbers Dorman M630839 replaces, along with 4581491AB, 4581491AC and 4581491AD.
