How Is a Knock Sensor Installed and Replaced in an Engine on Jeep Grand Cherokee?

The two sensors are fastened into the cylinder block beneath the intake manifold, using one joint cable and connector, meaning they need to be changed together. The LEFT tag on the side of the sensor helps to identify it, along with the larger bolt on its head. Because the Powertrain Control Module checks these positions, you should not switch the location of the sensors when installing it. Remove the intake manifold first and then go to the rear of the engine to unplug the knock sensor dual pigtail harness from the wiring harness. Then, unbolt both sensors and remember that the foam on the bolt thread is only there to hold them in place during plant assembly; avoid using any sealants, adhesives or thread compounds on these bolts. When you're finished, take out the sensors from the engine.

OEM Jeep Grand Cherokee Knock Sensor

Engine Knock Sensor

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10 Knock Sensors found

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Jeep Grand Cherokee Knock Sensor Part Number: 68166540AA
$137.15 MSRP: $205.00
You Save: $67.85 (34%)
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Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; Sensor Knock
- Replaces: 68166540AB
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2013-2017 Jeep Grand Cherokee | 75th Anniversary, Laredo, Limited, Overland, Summit, Trailhawk | 6 Cyl 3.6 L FLEX
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Jeep Grand Cherokee Knock Sensor Part Number: 4606093AF
$119.31 MSRP: $182.00
You Save: $62.69 (35%)
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Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; Throttle Sensor; Sensor Knock
- Replaces: 4606093AC, 4606093AE
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2007-2010 Jeep Grand Cherokee | Laredo, Limited | 3.7L V6, 4.7L V8, 6 Cyl 3.7 L GAS, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS
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Jeep Grand Cherokee Knock Sensor Part Number: 5033316AB
$128.23 MSRP: $194.00
You Save: $65.77 (34%)
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Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; MAP Sensor; Sensor Knock
- Replaces: 5033316AA, 56028563AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2005-2021 Jeep Grand Cherokee | High Altitude, Laredo, Limited, Limited X, Overland, Overland Summit, SRT, SRT8, Summit, Trailhawk | 5.7L V8, 6.1L V8, 6.4L V8, 8 Cyl 5.7 L GAS, 8 Cyl 6.1 L GAS, 8 Cyl 6.4 L GAS
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Jeep Grand Cherokee Knock Sensor Part Number: 56041677AB
$103.47 MSRP: $157.00
You Save: $53.53 (35%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; Map Sensor; Sensor Knock
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2005-2007 Jeep Grand Cherokee | 65th Anniversary Edition, Laredo, Limited | 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS
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Jeep Grand Cherokee Knock Sensor Part Number: 5149188AA
$58.62 MSRP: $79.70
You Save: $21.08 (27%)
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Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; Sensor Knock
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2011-2012 Jeep Grand Cherokee | Laredo, Limited, Overland, Overland Summit | 6 Cyl 3.6 L FLEX
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Jeep Grand Cherokee Knock Sensor Part Number: 68577697AA
$13.39 MSRP: $19.90
You Save: $6.51 (33%)
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Product Specifications
- Other Name: Sensor - Knock
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2023-2025 Jeep Grand Cherokee | 30th Anniversary 4xe, 4xe, Anniversary Edition 4xe | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Jeep Grand Cherokee Knock Sensor Part Number: 68570138AA
$22.70 MSRP: $33.60
You Save: $10.90 (33%)
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Product Specifications
- Other Name: Sensor - Knock
- Replaces: 68223050AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2018-2023 Jeep Grand Cherokee | 4xe, Overland, Summit, Summit Reserve, Trackhawk, Trailhawk | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6.2L V8, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L GAS
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Jeep Grand Cherokee Knock Sensor Part Number: 68313570AB
$19.98 MSRP: $29.35
You Save: $9.37 (32%)
ADD TO CART
Product Specifications
- Other Name: Sensor - Knock
- Replaces: 68313570AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2018-2025 Jeep Grand Cherokee | 80th Anniversary, Altitude, Altitude X, High Altitude, Laredo, Laredo E, Laredo X, Limited, Limited X, Overland, Summit, Summit Reserve, Trailhawk, Upland | 3.6L V6, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Jeep Grand Cherokee Knock Sensor Bracket Part Number: 56041849AA
Product Specifications
- Other Name: Sensor - Knock Sensor; Ignition Knock (Detonation) Sensor Bracket; Bracket Knock Sensor
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2005-2007 Jeep Grand Cherokee | 65th Anniversary Edition, Laredo, Limited | 6 Cyl 3.7 L GAS, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS
View related parts
Jeep Grand Cherokee Knock Sensor Part Number: 56041679AC
Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; Map Sensor; Sensor Knock
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
Fits the following Vehicles:
- 2005-2006 Jeep Grand Cherokee | 65th Anniversary Edition, Laredo | 6 Cyl 3.7 L GAS

Jeep Grand Cherokee Knock Sensor

Choose OEM Knock Sensor that meet Jeep factory standards. Jeep designs and tests every component for precision and durability. Each Knock Sensor follows strict manufacturing steps to lock in quality and fit. If your Jeep Grand Cherokee matters to you, OEM parts make the smart choice. You'll get the exact look, feel, and performance you expect. Shop genuine Grand Cherokee parts at the highly competitive prices online. Enjoy a manufacturer's warranty, a hassle-free return policy, and rapid delivery. No more guesswork with off brands. Get genuine parts with exact fit and true factory performance. Shop with confidence today at JeepPartsDeal.com.

Jeep Grand Cherokee's Knock Sensor has the responsibility of monitoring knock and ignition timing that is off in an engine. It transmits signals to the powertrain control module (PCM) so as to adapt the ignition period to control severe detonation. Usually, Jeep Grand Cherokee models incorporate piezoelectric knock sensors that make it possible to monitor pressure spikes that signify knocking on-going for a while continuously. Modern knock sensors have been used to fine-tune control strategies and that have included the flexibility of being able to program ignition timing per cylinder and control turbo boost pressure. This enables the engines to perform as expected even when using lower octane fuels and at the same time, reduce the chances of damage to the engines. The incorporation of these systems is a policy of keeping the efficiency and durability of the engines in different models of the Grand Cherokee.

Jeep Grand Cherokee Knock Sensor Parts and Q&A

Knock Sensor
4606093AF
Q: How Is a Knock Sensor Installed and Replaced in an Engine on Jeep Grand Cherokee?
A:
The two sensors are fastened into the cylinder block beneath the Intake Manifold, using one joint cable and connector, meaning they need to be changed together. The LEFT tag on the side of the sensor helps to identify it, along with the larger bolt on its head. Because the Powertrain Control Module checks these positions, you should not switch the location of the sensors when installing it. Remove the intake manifold first and then go to the rear of the engine to unplug the knock sensor dual pigtail harness from the wiring harness. Then, unbolt both sensors and remember that the foam on the bolt thread is only there to hold them in place during plant assembly; avoid using any sealants, adhesives or thread compounds on these bolts. When you're finished, take out the sensors from the engine.