Manifold Absolute Pressure Sensor: Removal

Remove the collector cover.
1. Carefully pull up the rear of collector cover at two positions (A).
2. Carefully pull up the front of collector cover at two positions (B) while moving it forward.
  
  Fig 1: Locating Rear And Front Collector Cover Positions
  Courtesy of SUBARU OF AMERICA, INC.
Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Repair Contents.>
Disconnect the connector (A) from the manifold absolute pressure sensor, and remove the manifold absolute pressure sensor from intake manifold.

Fig 2: Locating Manifold Absolute Pressure Sensor Connector Bolts
Courtesy of SUBARU OF AMERICA, INC.