Genuine Mazda Brake Booster Check Valve – Mazda 3 MPS / Mazdaspeed3
🛑 Genuine Mazda OEM Brake Booster Vacuum Check Valve
Genuine Mazda replacement brake booster check valve used in the brake vacuum assist system on Mazda 3 MPS, Mazdaspeed3, and selected Mazda Axela applications.
This one-way valve helps retain vacuum inside the brake booster so the vehicle maintains proper power-assisted braking. A faulty, leaking, or restricted check valve may contribute to a hard brake pedal, reduced brake assist, or inconsistent braking assistance.
✅ Product Details
- Genuine Mazda OEM part
- Brake booster vacuum check valve
- One-way valve design
- Helps retain vacuum in the brake booster
- Supports correct power-assisted brake operation
- Direct replacement for the applicable original valve
- Sold individually
🚗 Fitment
Commonly fitted to:
- Mazda 3 MPS BK
- Mazda 3 MPS BL
- Mazdaspeed3 Gen 1
- Mazdaspeed3 Gen 2
- Mazda Axela BK
- Mazda Axela BL
⚠️ Mazda Axela fitment can vary depending on the market, engine, and brake vacuum hose setup. Please compare the original valve and OEM part number before ordering.
🔧 Possible Fault Symptoms
A faulty brake booster check valve may cause:
- Hard brake pedal
- Weak or reduced brake assist
- Brake pedal becoming harder after repeated presses
- Vacuum leaking from the booster hose area
- Inconsistent power-assisted braking
- Hissing noises near the brake booster or vacuum hose
⚠️ These symptoms can also be caused by a damaged vacuum hose, brake booster fault, vacuum pump issue, or another vacuum system leak. Proper diagnosis is recommended before replacing parts.
🔢 OEM Part Number
B37F-43-770
🔍 Search Part Numbers
B37F-43-770
B37F43770
B37F.43.770
B37F 43 770
Keywords
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