OE Quality
60-Day Returns

Dorman M631084 Brake Master Cylinder
Overview of Dorman Brake Master Cylinder for Hyundai Tucson
The Dorman Brake Master Cylinder part number M631084 is designed specifically for Hyundai Tucson models. This brake hydraulics component features a durable plastic reservoir and a steel master cylinder body, engineered to maintain reliable brake fluid pressure and ensure consistent braking performance.
- Reservoir made of high-quality plastic for corrosion resistance
- Includes gasket and master cylinder cap for secure sealing
- Two mounting holes for stable installation
- 22.23 mm bore diameter with dual pistons for effective brake fluid control
- Simple reservoir type designed for straightforward maintenance
Detailed Product Description
The Dorman M631084 brake master cylinder is a critical component in the brake hydraulics system of Hyundai Tucson vehicles. Constructed with a steel master cylinder body and a plastic reservoir, it offers a balance of strength and corrosion resistance. The unit includes a gasket and a master cylinder cap to prevent fluid leaks and contamination. With two pistons and a bore diameter of 22.23 mm, this master cylinder provides precise hydraulic pressure to the brake system, ensuring responsive braking. The simple reservoir design facilitates easy fluid level monitoring and refilling.
Compatible Applications and Common Issues Addressed
- Replacement for worn or leaking brake master cylinders on Hyundai Tucson
- Resolves brake pedal sinking or sponginess due to internal seal failure
- Fixes brake fluid leaks from cracked or damaged reservoirs
- Addresses inconsistent brake pressure affecting stopping performance
- Restores proper brake system hydraulics after component wear
Installation Notes and Tips
When installing the Dorman M631084 brake master cylinder, ensure the brake fluid reservoir is properly filled and free of contaminants. Bleed the brake system thoroughly to remove air pockets and verify that the mounting holes align correctly with the vehicle’s brake booster or firewall. Since mounting hardware is not included, use the original fasteners or appropriate replacements. Inspect all seals and gaskets during installation to prevent leaks.
Quality Assurance and Warranty
Dorman brake master cylinders are manufactured to meet or exceed OEM specifications for fit, form, and function. The M631084 part undergoes rigorous quality control to ensure durability and reliable performance in Hyundai Tucson brake systems. This product includes a gasket and master cylinder cap to maintain system integrity. Warranty details should be confirmed with the distributor or retailer.
| Brand | Dorman |
| Part Number | M631084 |
| Reservoir Material | Plastic |
| Reservoir Material | Plástico |
| Dust Boot Included | No |
| Dust Boot Included | Non |
| Mounting Hardware Included | No |
| Mounting Hardware Included | Non |
| Gasket Or Seal Included | Oui |
| Gasket Or Seal Included | Sí |
| Gasket Or Seal Included | Yes |
| Mounting Hole Quantity | 2 |
| Master Cylinder Bore Diameter | 22.23 |
| Piston Quantity | 2 |
| Brake Booster Included | No |
| Brake Booster Included | Non |
| Master Cylinder Cap Included | Oui |
| Master Cylinder Cap Included | Sí |
| Master Cylinder Cap Included | Yes |
| Master Cylinder Material | Acero |
| Master Cylinder Material | Goma |
| Master Cylinder Material | Plastic |
| Master Cylinder Material | Plástico |
| Master Cylinder Material | Rubber |
| Master Cylinder Material | Steel |
| Master Cylinder Material | Zinc |
| Push Rod Included | No |
| Push Rod Included | Non |
| Reservoir Included | Oui |
| Reservoir Included | Sí |
| Reservoir Included | Yes |
| Reservoir Type | Simple |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2020 | Hyundai | Tucson | N/A | ||
| 2017 | Hyundai | Tucson | Ultimate | N/A | |
| 2016 | Hyundai | Tucson | N/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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.