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Dorman M390274 Brake Master Cylinder
Dorman M390274 Brake Master Cylinder
Dorman M390274 is a brake master cylinder built for specific Suzuki Swift, Chevrolet Metro, and Geo Metro applications with drum brake wheel cylinders using a 13/16 inch bore size. It uses a 0.813-inch bore, an aluminum body, an included reservoir, and an integrated sensor for a direct replacement focused on brake hydraulic performance.
Key Features
- Precision-engineered to match the original master cylinder design, function, and performance
- Aluminum master cylinder construction for durable service
- 0.813-inch bore diameter for the specified brake system setup
- Reservoir included for a complete hydraulic assembly
- Sensor included for vehicles equipped with the original sensor configuration
- Two outlets with M10 x 1.0 rearward outlet thread size
- Direct replacement for Dorman M390274 brake master cylinder applications
Detailed Description
This brake master cylinder is built for 1995-2001 Suzuki Swift, 1998-2000 Chevrolet Metro, and 1995-1997 Geo Metro models that use drum brake wheel cylinders with a 13/16 inch bore size. Dorman M390274 is manufactured from new materials and follows the original part’s layout so the hydraulic system can maintain proper pedal response and brake fluid delivery. This part cross-references Cardone New 13-2837 for the same application.
Common Problems This Part Can Address
- Brake pedal travel that feels excessive or inconsistent
- Loss of hydraulic pressure in the master cylinder circuit
- External fluid leakage from a worn master cylinder body or seals
- Brake warning light concerns related to the master cylinder sensor setup
- Poor brake fluid distribution to front and rear hydraulic circuits
Installation Notes and Tips
Verify bore size, outlet thread size, and sensor configuration before installation. This unit has two outlets, a 0.813-inch bore, and an M10 x 1.0 rearward outlet thread size. Bench bleeding the master cylinder before installation helps remove trapped air and supports proper pedal feel after the system is reassembled.
Quality Assurance
Dorman manufactures this master cylinder as a new replacement part using high-quality materials and OE-style engineering for the listed vehicle applications. It is designed to match the original master cylinder’s design, function, and performance for the specified Suzuki Swift, Chevrolet Metro, and Geo Metro fitments.
| Brand | Dorman |
|---|---|
| Part Number | M390274 |
| Mounting Hardware Included | No |
| Master Cylinder Bore Diameter | 0.813 |
| Master Cylinder Material | Aluminum |
| Reservoir Included | Yes |
| Secondary Outlet Thread Diameter | 10 |
| Sensor Included | Yes |
| Number of Outlets | 2 |
| Package Contents | Master cylinder |
| Rearward Outlet Size | M10 x 1.0 |
| Thread Pitch | 1.0 |
This part fits 13 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2001 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 2000 | Chevrolet | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 2000 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1999 | Chevrolet | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1999 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1998 | Chevrolet | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1998 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1997 | Geo | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1997 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1996 | Geo | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1996 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1995 | Geo | Metro | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
| 1995 | Suzuki | Swift | N/A | Compatible with drum brake wheel cylinders with a 13/16 inch bore size. |
* 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.