MPA Electrical B3166 Power Brake Booster

Vacuum Brake Booster for Nissan Maxima

MPA Electrical B3166 is a remanufactured vacuum power brake booster built for consistent brake assist and reduced pedal effort. It is a direct replacement for select 1985-1987 Nissan Maxima applications and is supplied without the master cylinder.

Key Features

• Remanufactured vacuum-type power brake booster
• Standard replacement brake service grade
• Metal housing for durable construction
• 222.5 mm / 8.76 in diaphragm diameter
• 8 x 1.25 mm master cylinder stud thread size
• Two mounting studs
• Master cylinder not included
• Brake pedal rod extension not included
• Mounting bracket, gasket/seal, and front seal not included

Product Details

Built for 1985-1987 Nissan Maxima brake systems, the MPA Electrical B3166 reman vac pwr brake booster w/o master cyl restores vacuum-assisted braking performance where the original booster has lost seal integrity or assist output. MPA Electrical reman brake boosters are engineered and tested to deliver strong braking assist with low pedal effort, while specially treated replacement components help maintain vacuum seal quality and pressure transfer. This part cross-references OE-style numbers 47210D4000 and 4721017 for the same application.

The MPA Electrical brake booster line focuses on remanufactured replacement units that are tested at the end of production using proprietary equipment. For buyers searching for a 1985 Nissan Maxima brake booster, 1986 Nissan Maxima vacuum booster, or 1987 Nissan Maxima power brake booster replacement, B3166 provides the correct vacuum booster format for the listed fitment.

What It Helps Fix

• Hard brake pedal feel
• Reduced vacuum brake assist
• Longer stopping effort caused by booster seal wear
• Brake pedal effort that increases after booster failure
• Loss of consistent pressure transfer in the brake assist system

Installation Notes and Tips

Verify master cylinder stud thread size, mounting stud layout, and booster depth before installation. Because the master cylinder is not included, transfer or replace related brake components as needed during service. Inspect the vacuum hose, check valve, and pedal linkage condition before installing the replacement booster on a 1985-1987 Nissan Maxima.

Quality Assurance

MPA Electrical subjects each unit to 100% end-of-line testing with proprietary test equipment to confirm function before release. The remanufactured construction and tested vacuum sealing help support reliable brake assist performance.