2021 Jeep Grand Cherokee TrackhawkFACTORY OEM SERVICE PROCEDURE

Sensor, Knock: Description: 5.7L/6.4L

GC0080083Courtesy of CHRYSLER GROUP, LLC

The 5.7L and 6.4L engines use two knock sensors (1) and are bolted to each side of the cylinder block (outside) under each exhaust manifold (3).

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.