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MPA Electrical NM55475 Brake Master Cylinder
Brake Master Cylinder for BMW Z4 and M3
Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55475. It is a standard replacement unit for select BMW models with front disc brakes, including the 2006-2008 BMW Z4 and 2004-2006 BMW M3.
Key Features
- Brake master cylinder for hydraulic brake system service
- Aluminum body construction
- 0.875 in. bore diameter
- Gasket or seal included
- Uses DOT 4 brake fluid
- Two mounting holes with 0.356 in. mounting hole diameter
- New condition, standard replacement grade
Product Details
MPA Electrical NM55475 is engineered as a direct brake hydraulic replacement for vehicles that require a master cylinder with front disc brake application coverage. The aluminum housing helps keep the unit lightweight while maintaining the fit and function expected in a standard replacement part. This master cylinder is built with a 0.875-inch bore and includes a seal, while the reservoir, cap, push rod, brake booster, sensor, pressure switch, mounting bracket, and mounting hardware are not included.
The MPA Electrical New with front disc brakes product line focuses on replacement brake hydraulics built to OE specifications using tested manufacturing processes and sample-based validation. For BMW M3 and BMW Z4 brake repair work, NM55475 provides a service-ready option for restoring hydraulic pressure and pedal feel. This part cross-references BMW OE numbers 34312282624 and 34317838253 for the same application.
What It Helps Fix
- Low or inconsistent brake pedal pressure
- Internal master cylinder seal wear
- Brake fluid leakage at the master cylinder
- Uneven hydraulic response in the brake system
- Brake performance loss on front disc brake applications
Installation Notes
Verify vehicle fitment before installation: Fits 2006-2008 BMW Z4, N/A, New with front disc brakes. Fits 2004-2006 BMW M3, N/A, New with front disc brakes. Bench bleed the master cylinder before connecting brake lines, use DOT 4 brake fluid, and inspect the brake booster, lines, and seals for wear before final assembly. Confirm the bore size and mounting hole layout match the original unit on your BMW M3 or BMW Z4.
Quality Assurance
MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict protocols to help ensure consistent braking performance out of the box.
| Brand | MPA Electrical |
|---|---|
| Part Number | NM55475 |
| Position | New with front disc brakes |
| Mounting Hardware Included | No |
| Grade Type | Standard replacement |
| Gasket Or Seal Included | Yes |
| Mounting Hole Quantity | 2 |
| Master Cylinder Bore Diameter | 0.875 |
| Brake Booster Included | No |
| Master Cylinder Cap Included | No |
| Master Cylinder Material | Aluminum |
| Push Rod Included | No |
| Reservoir Included | No |
| Sensor Included | No |
| Mounting Hole Diameter | 0.356 |
| Mounting Bracket Included | No |
| Brake Pressure Switch(s) Included | No |
| Fluid Type | Dot 4 |
| Product Condition | New |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | BMW | Z4 | 3.2L | L6 | N/A | New with front disc brakes |
| 2007 | BMW | Z4 | 3.2L | L6 | N/A | New with front disc brakes |
| 2006 | BMW | M3 | N/A | New with front disc brakes | ||
| 2006 | BMW | Z4 | 3.2L | L6 | N/A | New with front disc brakes |
| 2005 | BMW | M3 | N/A | New with front disc brakes | ||
| 2004 | BMW | M3 | N/A | New with front disc brakes |
* 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.