Core Functions

• Brake Force Amplification: Uses engine vacuum to multiply the driver’s pedal input force by 3–5 times. This reduces braking effort by 60–80% (e.g., applying 10 lbs of pedal force generates 30–50 lbs of force at the master cylinder), making it easier to stop the vehicle—especially critical in emergency braking or for drivers with limited leg strength.
• Vacuum Pressure Maintenance: The built-in check valve traps vacuum inside the booster when the engine is off (e.g., during coasting or engine shutdown). This ensures 1–2 additional brake applications with full assist, preventing sudden loss of braking power if the engine stalls.
• Master Cylinder Protection: Acts as a buffer between the brake pedal and master cylinder, distributing force evenly to the master cylinder’s pistons. This prevents uneven wear on the master cylinder seals and reduces the risk of internal leaks, extending the master cylinder’s lifespan.
• Safety Compliance: Meets global automotive safety standards (e.g., ECE R13H, FMVSS 105) for brake assist reliability. It ensures consistent braking performance across all driving conditions (e.g., cold weather, high altitude) and fails gracefully—if the booster malfunctions, the brake system reverts to manual operation (without assist) rather than complete failure.

Compatible Vehicles

This Brake Booster (OE: 31274809) is specifically tailored for Volvo’s sedan and wagon models from the mid-2000s to mid-2010s. Below is a consolidated list of variants and applicable years:

Notes: “(07-)” / “(08-)” denote models launched from the specified year onward. For 100% fitment accuracy, confirm compatibility with your vehicle’s VIN (Vehicle Identification Number) or Volvo’s official service manual—this accounts for engine-specific vacuum system designs (e.g., turbocharged vs. naturally aspirated engines) and regional brake system variations.

• Extensive Industry Experience: 13 years specializing in Volvo auto parts with precise product matching and technical solutions.
• Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
• Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
• Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Bosch and Hella.