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MPA Electrical B3089 Power Brake Booster
Vacuum Brake Booster for Nissan D21
MPA Electrical B3089 is a remanufactured vacuum power brake booster built for 1986-1989 Nissan D21 applications. It is engineered to deliver strong braking assist with reduced pedal effort, making it a direct replacement choice for brake service on the Nissan D21.
Key Features
- Remanufactured vacuum power brake booster
- Standard replacement brake service grade
- Metal housing for durable construction
- 242.82 mm / 9.56 in diaphragm diameter
- 2 mounting studs with 8 x 1.25 mm master cylinder stud thread size
- Master cylinder not included
- Brake pedal rod extension not included
- Gasket or seal not included
Product Details
The MPA Electrical Reman Vac Pwr Brake Booster w/o Master Cyl, part number B3089, is built for vacuum-assisted braking systems that require consistent pressure transfer and low pedal effort. MPA Electrical reman brake boosters are tested at the end of the production process to verify function before release, and this unit uses treated replacement components to support vacuum sealing and braking response. For drivers servicing a Nissan D21, B3089 provides a direct-fit brake booster solution for 1986-1989 models.
This part cross-references 4721023G10 for the same application.
Common Brake Issues It Can Address
- Hard brake pedal feel
- Reduced brake assist from a failing vacuum booster
- Inconsistent pedal response during braking
- Loss of vacuum seal in the booster assembly
- Brake performance concerns on 1986-1989 Nissan D21 trucks
Installation Notes
Verify the vacuum brake booster matches the original mounting style, diaphragm size, and master cylinder stud thread specification before installation. This unit does not include the master cylinder, pedal rod extension, gasket, seal, or mounting bracket, so reuse or source the correct related components as needed. Confirm vacuum hose routing and brake system condition during replacement on the Nissan D21.
Quality Assurance
MPA Electrical subjects each booster to 100% end-of-line testing using proprietary test equipment to confirm proper operation before shipment. The remanufactured construction and tested vacuum sealing help support reliable brake assist in service.
| Brand | MPA Electrical |
|---|---|
| Part Number | B3089 |
| Position | Reman Vac Pwr Brake Booster w/o Master Cyl |
| Brake Service Grade | Standard replacement |
| Booster Type | Vacuum |
| Brake Pedal Rod Extension Included | No |
| Master Cylinder Included | No |
| Gasket Or Seal Included | No |
| Housing Material | Metal |
| Diaphragm Diameter | 242.82 |
| Diaphragm Diameter | 9.56 |
| Mounting Bracket Included | No |
| Front Seal Included | No |
| Master Cylinder Stud Thread Size (mm) | 8 x 1.25 |
| Mounting Stud Quantity | 2 |
| Product Condition | Remanufactured |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Drive Type | Transmission | Position | Notes |
|---|---|---|---|---|---|---|
| 1989 | Nissan | D21 | RWD | Manual | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl |
| 1988 | Nissan | D21 | RWD | Manual | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl |
| 1987 | Nissan | D21 | Manual | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl | |
| 1986 | Nissan | D21 | Manual | N/A | Reman Vac Pwr Brake Booster w/o Master Cyl |
* 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.