Car encyclopedia

Vacuum Pump Replacement

The vacuum pump generates the necessary vacuum that is needed to power the brake booster and to control the heating and ventilation air flow. Vacuum pumps are used on diesel engines (since they do not produce vacuum) and on some gasoline engines that produce little vacuum, such as turbos.

How to Replace the Vacuum Pump

Note: There are two common types of vacuum pumps. These are general summaries of how to replace each type.

A. Electric Vacuum Pump

  1. Disconnect the negative battery terminal
  2. Remove any components that obstruct access to the electric vacuum pump
  3. Disconnect any air hoses and electrical connectors
  4. Remove the fasteners that secure the vacuum pump
  5. Remove the vacuum pump and install the new one
  6. Secure the new vacuum pump with its fasteners
  7. Reconnect all electrical connectors and air hoses
  8. Install any other removed components
  9. Reconnect the negative battery terminal and clear any codes
  10. Perform a Drive Cycle Test Drive to verify the repair

B. Belt Driven Vacuum Pump

  1. Disconnect the negative battery terminal
  2. Remove any drive belts that block access to the vacuum pump
  3. Disconnect any air hoses and electrical connectors
  4. Loosen the vacuum pump fasteners and remove the vacuum pump
  5. Install the new vacuum pump and secure its fasteners
  6. Reconnect any air hoses and electrical connectors
  7. Install any removed drive belts and reconnect the negative battery terminal
  8. Clear any codes and perform a Drive Cycle Test Drive to verify the repair
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