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TRW PMN222 Brake Master Cylinder
| Brand | TRW PMN222 |
|---|---|
| Reservoir Material | None |
| Dust Boot Included | Yes |
| Mounting Hardware Included | No |
| Gasket Or Seal Included | Yes |
| Mounting Hole Quantity | 2 |
| Master Cylinder Bore Diameter | 26.99 |
| Bleeder Screw Included | No |
| Piston Quantity | 2 |
| Brake Booster Included | No |
| Master Cylinder Material | Aluminum |
| Push Rod Included | No |
| Reservoir Included | No |
| Bleeder Hoses Included | No |
| Sensor Included | No |
| Port Quantity | 2 |
| Mounting Bracket Included | No |
| Bore Type | Straight |
| Primary Outlet Thread Size | M12 - 1.0 |
| Brake Pressure Switch Required | No |
| Brake Pressure Switch(s) Included | No |
| Primary Bore Diameter | 26.99 |
| Fits | Land Rover · 6 vehicles |
Aluminum construction. Lightweight master cylinder body with a straight bore design.
Seal included. Comes with a gasket or seal for a tighter hydraulic connection.
Dust boot included. Helps protect internal components from contamination.
Cross-references SJC000110, SJC100430 and SJC100431 for the same application. See all 4.
Brake Master Cylinder for Discovery
TRW PMN222 is a brake master cylinder built for direct replacement on select Land Rover Discovery applications. It uses an aluminum body, a straight bore design, and a 26.99 mm bore diameter to support consistent hydraulic brake pressure in the master cylinder circuit.
Compatible with 1999 Land Rover Discovery with 27mm diameter and 2000-2004 Land Rover Discovery, this TRW brake master cylinder is a fitment-based replacement for vehicles needing the correct bore size and outlet configuration. The PMN222 is a practical choice when restoring pedal feel and brake system response on a Land Rover Discovery.
Key Features
- Brand: TRW
- Part number: PMN222
- Brake master cylinder for brake hydraulics service
- Aluminum master cylinder construction
- 26.99 mm primary bore diameter
- Straight bore type
- 2 mounting holes and 2 ports
- Primary outlet thread size: M12 - 1.0
- Dust boot included
- Gasket or seal included
Detailed Description
The TRW PMN222 master cylinder is engineered for Land Rover Discovery brake system repair where the original hydraulic unit needs replacement. Its aluminum housing helps keep weight down while maintaining the structural support needed for brake pressure generation. The straight bore and 26.99 mm bore diameter are important details for matching the original brake system specification, especially on 1999 Land Rover Discovery models with 27mm diameter and 2000-2004 Land Rover Discovery vehicles.
This part number PMN222 includes a dust boot and gasket or seal, while the reservoir, brake booster, push rod, mounting hardware, and pressure switch components are not included. The two-port layout and M12 - 1.0 primary outlet thread size support proper hydraulic line connection when replacing the master cylinder on a Discovery brake hydraulics application.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Fix
- Low or inconsistent brake pedal pressure
- Internal master cylinder fluid bypass
- Brake fluid leakage at the master cylinder body or seals
- Soft or sinking brake pedal feel
- Hydraulic brake response issues on Land Rover Discovery models
Installation Notes and Tips
Verify bore diameter, outlet thread size, and port layout before installation. This PMN222 does not include a reservoir, brake booster, push rod, or mounting hardware, so reuse or source the correct related components as needed. Bench bleeding the master cylinder before final installation helps remove trapped air from the hydraulic circuit and supports proper pedal feel after service.
Fits 1999 Land Rover Discovery with 27mm diameter and 2000-2004 Land Rover Discovery. Part number PMN222 should be matched to the vehicle’s brake system configuration before installation.
Quality Assurance
TRW is a recognized brake component brand with OE-focused engineering across hydraulic brake parts. PMN222 is built as a replacement master cylinder for the listed Land Rover Discovery applications and is specified with the key dimensions needed for fitment-based brake service.
| Year | Make | Model | Submodel | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2004 | Land Rover | Discovery | S | — | — | — | N/A | — |
| 2003 | Land Rover | Discovery | HSE | 4.6L | V8 | — | N/A | — |
| 2002 | Land Rover | Discovery | Series II SD | — | — | — | N/A | — |
| 2001 | Land Rover | Discovery | Series II SE | — | — | — | N/A | — |
| 2000 | Land Rover | Discovery | Series II | — | — | — | N/A | — |
| 1999 | Land Rover | Discovery | Series II | 4.0L | V8 | GAS | N/A | With 27mm Diameter |
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