How is a Knock Sensor Installed and Replaced in an Engine on 2008 Jeep Grand Cherokee?

Because the two knock sensors are fastened to the cylinder block underneath the intake manifold and share one harness, they must be replaced as a set. You can see the tag marked "LEFT" near the left sensor which also has a bigger and more easily visible bolt head than the right sensor does. Maintaining the proper location of the left/right sensors matters, as the Powertrain Control Module identifies their placements. Take the intake manifold off in the beginning of the process. After that, pull the knock sensor dual pigtail harness away from the engine wiring harness found at the rear of the engine. Two sensor mounting bolts must be removed and no adhesive or sealant should ever be applied to the small foam pieces on the threads that hold the bolts in assembly. Quit with unplugging the sensors from the car's engine.

OEM 2008 Jeep Grand Cherokee Knock Sensor

Engine Knock Sensor

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2008 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
- Item Weight: 0.50 Pounds
- Item Dimensions: 1.4 x 3.4 x 9.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 4606093AF
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
More Info
Fits the following 2008 Jeep Grand Cherokee Submodels:
- 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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2008 Jeep Grand Cherokee Knock Sensor Part Number: 5033316AB
$128.23 MSRP: $194.00
You Save: $65.77 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor - Knock; Ignition Knock (Detonation) Sensor; MAP Sensor; Sensor Knock
- Replaces: 5033316AA, 56028563AA
- Item Weight: 0.50 Pounds
- Item Dimensions: 1.1 x 1.3 x 2.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 5033316AB
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
More Info
Fits the following 2008 Jeep Grand Cherokee Submodels:
- High Altitude, Laredo, Limited, Limited X, Overland, Overland Summit, SRT, SRT8, Summit, Trailhawk | 5.7L V8, 6.1L V8, 8 Cyl 5.7 L GAS, 8 Cyl 6.1 L GAS, 8 Cyl 6.4 L GAS

2008 Jeep Grand Cherokee Knock Sensor Parts and Q&A

Q: How is a Knock Sensor Installed and Replaced in an Engine on 2008 Jeep Grand Cherokee?
A: Because the two knock sensors are fastened to the cylinder block underneath the intake manifold and share one harness, they must be replaced as a set. You can see the tag marked "LEFT" near the left sensor which also has a bigger and more easily visible bolt head than the right sensor does. Maintaining the proper location of the left/right sensors matters, as the Powertrain Control Module identifies their placements. Take the intake manifold off in the beginning of the process. After that, pull the knock sensor dual pigtail harness away from the engine wiring harness found at the rear of the engine. Two sensor mounting bolts must be removed and no adhesive or sealant should ever be applied to the small foam pieces on the threads that hold the bolts in assembly. Quit with unplugging the sensors from the car's engine.