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Knock Sensors

  1. Knock Sensor AFI KN1000

    $111.95
    9997-KN1000
    Engine
    $111.95
  2. Knock Sensor AFI KN1001

    $125.95
    9997-KN1001
    Engine
    $125.95
  3. Knock Sensor BOSCH KN1003

    $107.95
    9997-KN1003
    Engine
    $107.95
  4. Knock Sensor AFI KN1004

    $53.95
    9997-KN1004
    Engine, Dual fitment
    $53.95
  5. Knock Sensor AFI KN1005

    $71.95
    9997-KN1005
    Engine, , Single fitment
    $71.95
  6. Knock Sensor AFI KN1081

    $124.95
    9997-KN1081
    Engine, Engine Code: EJ22, SOHC
    VIN: JF1BG6
    $124.95
  7. Knock Sensor AFI KN1009

    $117.95
    9997-KN1009
    , Engine
    $117.95
  8. Knock Sensor BOSCH KN1012

    $155.95
    9997-KN1012
    Engine, Front
    $155.95
  9. Knock Sensor BOSCH KN1015

    $46.95
    9997-KN1015
    Engine, Rear
    $46.95
  10. Knock Sensor AFI KN1022

    $241.95
    9997-KN1022
    Engine
    $241.95
  11. Knock Sensor AFI KN1088

    $113.95
    9997-KN1088
    Engine, Engine Code: EJ251 SOHC
    VIN: JF1GDE
    $113.95
  12. Knock Sensor AFI KN1026

    $75.95
    9997-KN1026
    Engine,
    $75.95
  13. Knock Sensor AFI KN1030

    $191.95
    9997-KN1030
    Engine,
    $191.95
  14. Knock Sensor AFI KN1034

    $41.95
    9997-KN1034
    Engine
    $41.95
  15. Knock Sensor AFI KN1119

    $145.95
    9997-KN1119
    Engine, , From: 4/2010 on
    $145.95
  16. Knock Sensor AFI KN1093

    $110.95
    9997-KN1093
    Engine, To: 6/2003
    $110.95
  17. Knock Sensor AFI KN1044

    $258.95
    9997-KN1044
    Engine
    $258.95
  18. Knock Sensor AFI KN1120

    $278.95
    9997-KN1120
    Engine
    $278.95
  19. $164.95
  20. Knock Sensor AFI KN1121

    $107.95
    9997-KN1121
    Engine,
    $107.95
  21. Knock Sensor AFI KN1245

    $110.95
    9997-KN1245
    Engine, Engine Code: EJ207 DOHC Turbo
    VIN:JF1GDB
    From: 10/2002
    $110.95
  22. Knock Sensor AFI KN1123

    $133.95
    9997-KN1123
    Engine
    $133.95
  23. Knock Sensor AFI KN1097

    $130.95
    9997-KN1097
    Engine, , Engine Code: N46B20B, N46B20C, N43B20A
    $130.95
  24. Knock Sensor BOSCH KN1060

    $127.95
    9997-KN1060
    Engine, Front,
    $127.95
  25. Knock Sensor AFI KN1247

    $110.95
    9997-KN1247
    Engine, Engine Code: EJ207 DOHC Turbo
    VIN:JF1GDB
    To:10/2002
    $110.95
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Pay for your order with 4 easy payments over 8 weeks. Simply spend between $100 - $1500 to Checkout with Afterpay.

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About Knock Sensors

Engine knock occurs when the fuel/air mixture injected into your engine doesn't combust properly, creating a metallic ping or 'knocking' sound that's familiar to many seasoned drivers. While a common issue in older engines and vehicles using low octane fuels, engine knock can lead to worse things down the track, meaning a good knock sensor is vital in just about any engine.

How Knock Sensors Work

Engine knock essentially occurs when pockets of air and fuel within your engine's combustion chambers spontaneously combust of their own accord, rather than doing so when your engine is timed to fire it's spark plugs. While engine knock may not seem like a particularly pressing issue, it can be a gateway to more serious engine problems down the line. Failure to act upon a knocking engine can lead to serious engine damage, as one of the effects of engine knock is a massive spike in engine cylinder heat. In turn, severe knocking can actually blow holes in your pistons and engine cylinders, leading to catastrophic engine failure.

The knock sensor is designed to counteract this. Monitoring the spikes in cylinder pressure caused by engine knock, the knock sensor can pick up on when your engine is detonating, telling the ECU to adjust the ignition timing to compensate for it. This is absolutely vital in stopping any cases of engine knock from becoming more severe than they need to, and also in allowing you the time to get onto the cause of your knocking engine sooner rather than later.

Our Range of Knock Sensors

To make sure you get onto engine knock quickly, check out our premium and value ranges of knock sensors from respected companies AFI, Bosch, Fuelmiser and HELLA. All of our knock sensors are manufactured to OE standards, ensuring that your vehicle gets the best protection that's approved by vehicle manufacturers worldwide.