Structure and inner electrical connection

2013 Mini Cooper Countryman, Standard TransSECTION Structure and inner electrical connection
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The signal is converted by a Piezo-ceramic disc. Pressure forces within the ceramic lead to a load shift that causes a voltage. This voltage is picked up by contact discs.

Fig 1: Knock Sensor - Circuit Diagram
G09909937Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Knock sensor
PIN REFERENCE

Pin Explanation
SIG1 Differential signal 1
SIG2 Differential signal 2
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

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