Core Functions

• Vacuum Sealing: Maintains an airtight seal within the vacuum pump, preserving the required vacuum pressure. This is critical for the pump to supply vacuum to vehicle systems like the brake booster (enhancing braking force) and HVAC controls (regulating airflow).
• Leak Prevention: Blocks external air from entering the vacuum pump and internal oil/coolant from leaking out. Vacuum leaks would reduce the pump’s output, leading to weak brakes or malfunctioning climate controls; fluid leaks could damage the pump or surrounding components.
• Environmental Resistance: The rubber material resists degradation from engine oil, coolant, and high temperatures, ensuring long-term sealing performance and reducing the need for frequent replacement.

Compatible Vehicles

This Vacuum Pump O Ring (OE: 31401249) is tailored for the following Volvo models and their respective year ranges:

1. Vacuum pump O rings are pump and engine-specific—even for the same model, fitment may differ by engine variant (e.g., 2.0L turbo vs. 3.0L inline-6). Confirm the vacuum pump’s part number and your vehicle’s engine code via the VIN (Vehicle Identification Number) before replacement.
2. When installing, clean the sealing grooves of the vacuum pump and engine block to remove oil, debris, or old rubber residue. A dirty surface can prevent proper sealing and cause premature O ring failure.
3. Do not reuse old O rings—even if they appear undamaged, their elasticity and sealing ability degrade over time. Always replace with a new OE-grade part (like 31401249) for reliable performance.

• 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.