To remove the intake manifold, first disconnect the cable from the negative battery terminal. Next, remove the intake air duct from the air filter housing and disconnect the accelerator and cruise control cables from the throttle valve, positioning the cables aside after removing the harness clips. For 2006 and later models, also remove the main electrical connector from the engine side of the PCM and the main harness support bolt. Disconnect the vacuum hoses from the upper intake manifold, marking each hose with tape for correct reassembly. Disconnect the IAC valve, TPS, and any other electrical connectors that may interfere with manifold removal, as well as the EGR valve vacuum hose and the EVAP canister purge solenoid vacuum hose. For 2010 and earlier models, remove the ignition wires from the coil pack and spark plugs, then remove the intake manifold mounting bolts and lift the manifold from the engine compartment. For 2011 models, remove the EGR vacuum regulator solenoid, disconnect the power brake booster vacuum hose at the intake manifold if necessary, disconnect the spark plug wires, and remove the ignition coil. Disconnect the knock sensor electrical connector, remove the intake manifold mounting bolts, and lift the manifold to access and remove the PCV fitting bolts. To install, clean away all traces of old gasket material and remove oil and dirt with a cloth and solvent. Install new O-ring gaskets around each of the six intake runners, ensuring no sealant is required. Install the manifold to the cylinder heads, aligning the bolt holes, and tighten the bolts finger-tight without moving the manifold back and forth to prevent O-ring seal misalignment. Tighten the bolts to the specified torque, starting with the center bolts and working towards the ends. The remainder of the installation follows the reverse order of removal, after which run the engine and check for oil, coolant, and vacuum leaks.