Intake Side

Camshaft position sensor RH
1. Disconnect the ground cable from battery.
2. Disconnect the connector (A) from the camshaft position sensor RH, and remove the camshaft position sensor RH from the rear side of the cylinder head.
  
  Fig 1: Locating Camshaft Position Sensor RH Bolt
  Courtesy of SUBARU OF AMERICA, INC.
Camshaft position sensor LH
1. Disconnect the ground cable from battery.
2. Remove the intake manifold. <Ref. to REMOVAL , Intake Manifold.>
3. Remove the camshaft position sensor LH.
  
  Fig 2: Locating Camshaft Position Sensor LH Bolt
  Courtesy of SUBARU OF AMERICA, INC.