How to remove and install knock sensors in Kia Optima?

The knock sensor in four-cylinder and 2001-2006 V6 models is on the engine block's front side. To remove, disconnect the negative battery terminal and the sensor's electrical connector, then unscrew the mounting bolt. For 2006.5 and later V6 models, the sensors are between the cylinder heads, requiring intake manifold removal. Disconnect the negative battery terminal, remove the intake manifolds, disconnect the sensor's electrical connectors, remove the wiring harness retainers from the engine block, unscrew the mounting bolts, and remove the sensors. Installation is the reverse of removal.

Genuine Kia Optima Knock Sensor

Engine Knock Sensor

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9 Knock Sensors found

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Kia Optima Sensor Assembly-Knock
Part Number: 392502G100
$78.49 MSRP: $105.50
You Save: $27.01 (26%)

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Product Specifications
- Other Name: Knock Sensor
- Replaces: 392502G000
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2008-2020 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Sensor Assembly-Knock,RH
Part Number: 3925037100
$63.79 MSRP: $85.73
You Save: $21.94 (26%)

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Product Specifications
- Other Name: Sensor-Knock; Knock Sensor
- Manufacturer Note: RH
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Sensor-Knock
Part Number: 392502G700
$50.34 MSRP: $67.67
You Save: $17.33 (26%)

Add to Cart
Product Specifications
- Other Name: Knock Sensor
- Replaces: 392502G200
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2011-2020 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Sensor Assembly-Knock,LH
Part Number: 3925037150
$58.97 MSRP: $79.27
You Save: $20.30 (26%)

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Product Specifications
- Other Name: Sensor Assembly-Knock; Knock Sensor
- Manufacturer Note: LH
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Sensor Assembly-Knock
Part Number: 392502B020
$81.31 MSRP: $109.28
You Save: $27.97 (26%)

Add to Cart
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2016-2020 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Sensor Assembly-Knock
Part Number: 392503E120
$62.15 MSRP: $83.53
You Save: $21.38 (26%)

Add to Cart
Product Specifications
- Other Name: Sensor-Knock,LH; Knock Sensor
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Sensor-Knock
Part Number: 3925025200
$60.07 MSRP: $80.73
You Save: $20.66 (26%)

Add to Cart
Product Specifications
- Other Name: Sensor Assembly-Knock
- Replaced by: 3925025300
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
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Fits the following Vehicles:
- 2006-2008 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta FF | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Sensor Assembly-Knock
Part Number: 392503E110
$62.15 MSRP: $83.53
You Save: $21.38 (26%)

Add to Cart
Product Specifications
- Other Name: Sensor-Knock,RH; Knock Sensor
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
View More
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Kia Optima Sensor Assembly-Knock,RH
Part Number: 3951038021
$80.08 MSRP: $107.63
You Save: $27.55 (26%)

Add to Cart
Product Specifications
- Other Name: Sensor-Knock; Knock Sensor
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
View More
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.4L | 4 Door Sedan

Kia Optima Knock Sensor Parts Questions & Answers

Sensor Assembly-Knock
392502G100
Q: How to remove and install knock sensors in Kia Optima?
A: The knock sensor in four-cylinder and 2001-2006 V6 models is on the engine block's front side. To remove, disconnect the negative battery terminal and the sensor's electrical connector, then unscrew the mounting bolt. For 2006.5 and later V6 models, the sensors are between the cylinder heads, requiring intake manifold removal. Disconnect the negative battery terminal, remove the intake manifolds, disconnect the sensor's electrical connectors, remove the wiring harness retainers from the engine block, unscrew the mounting bolts, and remove the sensors. Installation is the reverse of removal.

Related Kia Optima Parts

About Kia Optima Knock Sensor

Quality of automotive experience needs good performance car parts. So for keeping your Kia vehicle has comfortable experience, the genuine Kia Optima Knock Sensors are essential. As a driver, when your vehicle does not work properly you have to know what went wrong. And if you want replace your Kia Optima Knock Sensor, the online catalog we provide will get you through the ordering process safely and securely. And all genuine Kia Optima Knock Sensors from us are shipped directly from authorized Kia Dealer.