HomeBrake > Brake HydraulicsDorman M631027 Brake Master Cylinder
Part #: M631027

Dorman M631027 Brake Master Cylinder

⚙️ 7 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$123.64Free 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: Cadillac, SRX
🔄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 Cadillac SRX

The Dorman M631027 Brake Master Cylinder is engineered to restore proper brake hydraulics for your Cadillac SRX. Designed with precision, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

  • Compatible with Cadillac SRX models
  • Constructed from durable aluminum for long-lasting performance
  • Includes a removable reservoir and master cylinder cap for easy maintenance
  • Features a bore diameter of 1.063 inches for accurate fluid displacement
  • Equipped with two mounting holes and two outlets for secure installation
  • Includes a sensor for monitoring brake system status
  • Rearward outlet thread size M12 x 1.0 for proper brake line connection

Product Details and Specifications

The Dorman M631027 master cylinder is crafted from aluminum, providing a lightweight yet robust component for your Cadillac SRX brake system. It features a 1.063-inch bore diameter, which is critical for maintaining the correct hydraulic pressure. This unit comes with a removable reservoir and a master cylinder cap included, facilitating fluid checks and refills. The master cylinder has two mounting holes for secure attachment and two outlets, including a rearward outlet with an M12 x 1.0 thread diameter, ensuring compatibility with your vehicle's brake lines. Additionally, the integrated sensor helps monitor brake fluid levels or pressure, contributing to overall brake system safety. Note that this part does not include mounting hardware, brake booster, push rod, bleeder hoses, or mounting bracket.

Common Applications and Problem Resolution

  • Restores brake fluid pressure for consistent braking performance
  • Replaces leaking or damaged master cylinders in Cadillac SRX models
  • Addresses brake pedal sinking or sponginess due to internal seal failure
  • Solves brake fluid contamination issues with a new removable reservoir
  • Improves brake system responsiveness by ensuring proper hydraulic function

Installation Notes and Tips

When installing the Dorman M631027 master cylinder on your Cadillac SRX, ensure the brake system is properly bled to remove any air pockets. The removable reservoir simplifies fluid refills during installation. Verify that the sensor connections are secure to maintain accurate brake system monitoring. Since mounting hardware is not included, retain or source the appropriate bolts for the two mounting holes. Proper torque specifications should be followed to avoid leaks or component damage.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards, using high-quality aluminum for durability and corrosion resistance. The inclusion of a sensor and removable reservoir reflects attention to functional detail. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.

BrandDorman
Part NumberM631027
Mounting Hardware IncludedNo
Mounting Hole Quantity2
Master Cylinder Bore Diameter1.063
Brake Booster IncludedNo
Master Cylinder Cap IncludedYes
Master Cylinder MaterialAluminum
Push Rod IncludedNo
Reservoir IncludedYes
Secondary Outlet Thread Diameter12
Bleeder Hoses IncludedNo
Sensor IncludedYes
Mounting Bracket IncludedNo
Number of Outlets2
Package Contents1 master cylinder
Rearward Outlet SizeM12 x 1.0
Reservoir TypeRemovable

This part fits 7 vehicles. Search below:

YearMakeModelPositionNotes
2016CadillacSRXN/ABrake Master Cylinder without Adaptive Cruise Control
2015CadillacSRXN/ABrake Master Cylinder without Adaptive Cruise Control
2014CadillacSRXN/ABrake Master Cylinder without Adaptive Cruise Control
2013CadillacSRXN/A
2012CadillacSRXN/A
2011CadillacSRXN/A
2010CadillacSRXN/A

* 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:

10-4342130.6217120819270MC146051

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