Toyota 17150-31011 Left Exhaust Manifold Sub-Assembly

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The electrical connectors from the upstream oxygen sensors should be disconnected.

1. Raise the vehicle and place it securely on jackstands. 2. Disconnect the electrical connectors from the downstream oxygen sensors. 3. Spray the nuts on the studs of the exhaust flange and the nuts on the upper flanges of the front exhaust pipe assembly with penetrant. 4. Remove the nuts from the upper flange at the lower end of the left exhaust manifold. 5. Remove the nuts and bolts from the flange where the left catalyst assembly is connected to the right half of the front exhaust pipe assembly.

Remove the heat shields from the exhaust manifolds.