1994 Mazda B2300 L4-2.3L; RWD. 1994 Mazda B4000 V6-4.0L. 1994 Mazda B3000 V6-3.0L. Booster Type：Vacuum. Type：Brake Booster. A: How can I test my brake booster for proper functionality?. B: With the engine off, pump the brake pedal until it feels firm and hold.
