How to check and replace the knock sensor on Hyundai Elantra?

The checking procedure is available only for the models prior to 2006 since the further models imply special equipment and checking procedures. The knock sensor of 2006 and older models is found on the front side of the engine cylinder block, by the oil pan while for 2007 and new model, the knock sensor is placed at the upper rear side of the engine. To diagnose the sensor, first you have to ensure the electrical connection to the knock sensor is disconnected and then apply an ohmmeter to choose the attendance of the knock sensor resistance. For the models ranging from 1996 to 2000, connect the multimeter to terminals 2 and 3 of the sensor side of the connector; for the models from 2001 onward, connect the multimeter to the two terminals of the knock sensor connector. If the measured resistance is lower than the specified resistance, failure is presumed to be related to the knock sensor and the part needs to be changed. This article specifies the procedures to be followed to remove the sensor; these include; disconnecting their electrical connection, uninstalling the intake manifold, and dismantling the engine cylinder block, the knock sensor is held in place by a single bolt which you have to unscrew to release the sensor. Installation on the other hand is done in the reverse order to the way of removal.

Genuine Hyundai Elantra 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).

10 Knock Sensors found

View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-23500
$106.48 MSRP: $149.60
You Save: $43.12 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2000-2006 Hyundai Elantra | High Grade, Middle Grade | 4 Door Sedan, 5 Door Sedan
View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-26600
$106.48 MSRP: $149.60
You Save: $43.12 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2000-2006 Hyundai Elantra | High Grade, Middle Grade | 4 Door Sedan, 5 Door Sedan
View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-23010
$107.64 MSRP: $151.23
You Save: $43.59 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 1995-2000 Hyundai Elantra | High Grade, Middle Grade | 4 Door, 5 Door Wagon 5
View related parts
Hyundai Elantra Sensor Assembly-Knock
Part Number: 39250-2E000
$41.86 MSRP: $58.31
You Save: $16.45 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2011-2020 Hyundai Elantra | DOHC - GDI, DOHC - MPI | Coupe - 2Door 5P, Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor Assembly-Knock
Part Number: 39250-03AA0
$49.33 MSRP: $68.71
You Save: $19.38 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2016-2020 Hyundai Elantra | DOHC - TCI/GDI | Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor Assembly-Knock
Part Number: 39250-2B020
$101.86 MSRP: $143.11
You Save: $41.25 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2016-2020 Hyundai Elantra | DOHC - TCI/GDI | Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-23900
$106.48 MSRP: $149.60
You Save: $43.12 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2006-2010 Hyundai Elantra | High Grade, Middle Grade | DOHC - MPI | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor Assembly-Knock
Part Number: 39250-03HA0
$49.33 MSRP: $68.71
You Save: $19.38 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2021-2023 Hyundai Elantra | DOHC - GDI | Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-2J302
$71.13 MSRP: $99.94
You Save: $28.81 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2021-2023 Hyundai Elantra | DOHC - MPI | Sedan - 4Door 5P
View related parts
Hyundai Elantra Sensor-Knock
Part Number: 39250-2M400
$38.79 MSRP: $54.03
You Save: $15.24 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
Fits the following Vehicles:
- 2021-2023 Hyundai Elantra | DOHC - TCI/GDI | Sedan - 4Door 5P

Hyundai Elantra Knock Sensor

Hyundai Elantra Knock Sensor helps keep the engine safe by sensing when it is about to suffer damage from harmful spark knock. It allows the control computer to make timing adjustments before damage occurs. Mounted on the engine block, this piezoelectric Knock Sensor converts vibration from the pressure spike into an electrical signal, which the PCM immediately retards ignition advance by small increments until the rattle clears away. It then gradually resumes optimal timing for power, economy, and low emissions. Early Hyundai Elantra models had a single narrow band Knock Sensor that protected all cylinders together, whereas newer generations have a refined version that provides faster, cylinder-specific feedback for more refined control. Both styles use the same basic goal, but the wider frequency range and faster response of the later sensor mean the computer can be run closer to the knock limit, and performance is maintained even with lower octane fuel or extreme temperatures. When the Knock Sensor fails, there is no way to correct the timing, and the car is not very drivable. The check engine lamp is usually on. Reliable sensors help Hyundai owners enjoy smooth running, dependable Elantra acceleration, and longer engine life. A healthy Knock Sensor also allows Hyundai Elantra engines to meet emissions targets.

If you are looking for affordable high-quality OEM Hyundai Elantra Knock Sensor, then you have come to the prime place. Our website provides a large amount of genuine Hyundai Elantra Knock Sensor at unbeatable prices. All our parts come backed with the manufacturer's warranty.

Hyundai Elantra Knock Sensor Parts Questions & Experts Answers

Sensor-Knock
39250-23010
Q: How to check and replace the knock sensor on Hyundai Elantra?
A:
The checking procedure is available only for the models prior to 2006 since the further models imply special equipment and checking procedures. The knock sensor of 2006 and older models is found on the front side of the engine cylinder block, by the oil pan while for 2007 and new model, the knock sensor is placed at the upper rear side of the engine. To diagnose the sensor, first you have to ensure the electrical connection to the knock sensor is disconnected and then apply an ohmmeter to choose the attendance of the knock sensor resistance. For the models ranging from 1996 to 2000, connect the multimeter to terminals 2 and 3 of the sensor side of the connector; for the models from 2001 onward, connect the multimeter to the two terminals of the knock sensor connector. If the measured resistance is lower than the specified resistance, failure is presumed to be related to the knock sensor and the part needs to be changed. This article specifies the procedures to be followed to remove the sensor; these include; disconnecting their electrical connection, uninstalling the intake manifold, and dismantling the engine cylinder block, the knock sensor is held in place by a single bolt which you have to unscrew to release the sensor. Installation on the other hand is done in the reverse order to the way of removal.