Genuine Mazda brake booster check valve used in the brake vacuum assist system. Helps hold vacuum for the brake booster and can be linked to a hard pedal or weak brake assist when faulty.
Fitment: Mazdaspeed 3 Gen 1 (BK) and Gen 2 (BL). Also listed for Mazda Axela applications depending on market and brake vacuum hose setup.
OEM Part Number: B37F-43-770.
Search part numbers: B37F-43-770, B37F43770, B37F.43.770, B37F 43 770.