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Leaking plastic tube fits into intake manifold and behind belt tensioner 45 degree bend 96 regal 3.8 what is it how to fix?

The leaking plastic tube is most likely the intake air temperature (IAT) sensor.

The IAT sensor measures the temperature of the air entering the engine and sends this information to the engine control unit (ECU).

- To fix this issue, you will need to:

- Disconnect the negative battery terminal.

- Remove the air filter cover and air filter.

- Use a wrench to loosen the clamp on the connector at the bottom of the IAT sensor.

- Pull the connector off.

- Use a 5/8 inch wrench to loosen the sensor at the base.

- Slide the sensor out, being careful not to drop it into the engine manifold.

- Inspect the sensor for damage and replace it if needed.

- Insert the new sensor into the intake manifold and tighten it securely.

- Reinstall the connector.

- Tighten the clamp on the connector. Reattach the air filter and air filter cover.

- Reconnect the negative battery terminal.