Vacuum Pump Check Valve – Mercedes 2.5L / 3.0L / 3.5L (2006–2011) | OEM 2722300065 LA1231078Vacuum Pump Check Valve Mercedes Benz 2. 5L 3. 0L 3. 5L (20062011) OEM 2722300065 LA1231078 Restore Brake Assist Vacuum Retention on Your Mercedes Direct Replacement Check Valve. The vacuum pump check valve on Mercedes 2. 5L, 3. 0L, and 3. 5L petrol engines (20062011) maintains vacuum in the brake servo circuit. When it fails, vacuum bleeds back causing a soft brake pedal. This direct replacement valve restores correct vacuum retention. OEM References

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