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

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

9 Knock Sensors found

View related parts
Kia Optima Sensor Assembly-Knock
Part Number: 392502G100
$74.38 MSRP: $105.50
You Save: $31.12 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Replaces: 392502G000
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2008-2020 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Sensor Assembly-Knock,RH
Part Number: 3925037100
$60.44 MSRP: $85.73
You Save: $25.29 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor-Knock; Knock Sensor
- Manufacturer Note: RH
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
View related parts
Kia Optima Sensor-Knock
Part Number: 392502G700
$47.71 MSRP: $67.67
You Save: $19.96 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Replaces: 392502G200
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2020 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Sensor Assembly-Knock,LH
Part Number: 3925037150
$55.88 MSRP: $79.27
You Save: $23.39 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Knock; Knock Sensor
- Manufacturer Note: LH
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
View related parts
Kia Optima Sensor Assembly-Knock
Part Number: 392502B020
$77.04 MSRP: $109.28
You Save: $32.24 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
View related parts
Kia Optima Sensor Assembly-Knock
Part Number: 392503E120
$58.89 MSRP: $83.53
You Save: $24.64 (30%)
Ships in 1-3 Business Days
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.
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-Knock
Part Number: 3925025200
$59.10 MSRP: $80.73
You Save: $21.63 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Knock
- Replaced by: 3925025300
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2008 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta FF | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Kia Optima Sensor Assembly-Knock
Part Number: 392503E110
$58.89 MSRP: $83.53
You Save: $24.64 (30%)
Ships in 1-3 Business Days
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.
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
$75.88 MSRP: $107.63
You Save: $31.75 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor-Knock; Knock Sensor
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.4L | 4 Door Sedan

Kia Optima Knock Sensor

The Knock Sensor in Kia Optima cars is one of the major parts that help in the identification of engine knock and to relay the required signals to the power train control module for correction of ignition timing. Of electro-mechanical origins, the Knock Sensor is normally piezoelectric which transforms pressure pulses associated with knock into electrical form. It makes fine tuning of ignition timing possible and greatly benefits the power and durability of the engine, when running low octane fuels. Sophisticated systems installed in today's Kia Optima models may also incorporate data of ignition timings per cylinder and boost pressure in order to control, among other things, the knock and to optimize the performance of the engines in the car under various circumstances.

If you're in search of top-notch, reasonably priced OEM Kia Optima Knock Sensor, then you've found the perfect spot. Our website boasts an extensive inventory of Kia Optima Knock Sensor, all priced at the market's premier price. Rest assured, every genuine part we offer comes with a warranty straight from the manufacturer.

Kia Optima Knock Sensor Parts Questions & Experts 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.