Jeep 5033316AB Sensor-Knock

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The knock sensor is located at the front of the engine block, under the exhaust manifold.

The knock sensors for the 3.6L V6, 3.7L V6, and 4.7L V8 engines are located on top of the block, in the valley between the cylinder heads, underneath the intake manifold. They must be replaced as a single assembly and are not available separately. To replace the knock sensors, start by disconnecting the cable from the negative battery terminal. Then, disconnect the knock sensor electrical connector, which is located at the rear of the engine, behind the intake manifold. If you can't find the connector, wait until you have removed the intake manifold and locate the two knock sensors and trace their leads back to the common connector. Remove the intake manifold and then remove the knock sensor assembly by removing the mounting bolts. Make sure to clean the holes for the mounting bolts before installing the new knock sensor assembly. For 3.7L V6 engines, note that the left knock sensor is identified by an identification tag and has a larger mounting bolt. Do not install the left knock sensor in the right sensor mounting position and vice versa, as it will confuse the PCM and cause a Diagnostic Trouble Code. Installation is the reverse of removal, making sure to tighten the knock sensor mounting bolts to the correct torque. For Hemi engines, there are two knock sensors located on the left and right sides of the block below the exhaust manifold. To replace them, raise the front of the vehicle and secure it on jackstands. Disconnect the electrical connector from the knock sensor and remove the mounting bolt. Installation is the reverse of removal, making sure to tighten the mounting bolts to the correct torque.

The knock sensor is located on the side of the engine block, in front of the starter, under the intake manifold.

To disconnect the knock sensors, start by disconnecting the cable(s) from the negative battery terminal(s). For the 3.6L V6 engine, there are two knock sensors located below the lower intake manifold area. The sensor closest to the front of the engine is Sensor 1, and the other is Sensor Remove the intake manifolds and then disconnect the electrical connector(s) before removing the sensor(s) mounting bolt(s). The sensors can be found in the valley between the cylinder banks. For the 3.7L V6 and 4.7L V8 engines, remove the intake manifold and then disconnect the knock sensor electrical connector located at the rear of the engine, behind the intake manifold. Remove the knock sensor mounting bolt(s) and the knock sensor(s). Make sure to clean the holes for the mounting bolts before installing them again. For HEMI engines, there are two knock sensors located on the left and right sides of the block, below the exhaust manifold. Raise the front of the vehicle and secure it on jackstands. Disconnect the electrical connector from the knock sensor and remove the knock sensor mounting bolt. Finally, install the knock sensor(s) by reversing the removal process and tightening the mounting bolts.