Where is the knock sensor located and How to remove and install on 2010 Mazda 3?

The block has a knock sensor on its front side behind the intake manifold. Begin with taking out the battery cover and cable of negative. Firstly, take out intake manifold, disconnect the electrical connector of knock sensor and take away the sensor. To install one, reverse the procedure and screw the bolt.

Genuine 2010 Mazda 3 Knock Sensor

Engine Knock Sensor

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3 Knock Sensors found

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2010 Mazda 3 Knock Sensor Part Number: LF01-18-921
$43.75 MSRP: $58.35
You Save: $14.60 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Knock
- Replaces: 1F20-18-921A, 1F20-18-921
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: LF01-18-921
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
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Fits the following 2010 Mazda 3 Submodels:
- i, S, SP23 | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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2010 Mazda 3 Knock Sensor Part Number: LF02-18-921
$95.44 MSRP: $127.28
You Save: $31.84 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Knock
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: LF02-18-921
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 2010 Mazda 3 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
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2010 Mazda 3 Knock Sensor Part Number: L807-18-921
$114.39 MSRP: $152.54
You Save: $38.15 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Knock
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L807-18-921
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 2010 Mazda 3 Submodels:
- Mazdaspeed, S | 4 Cyl 2.3 L GAS

2010 Mazda 3 Knock Sensor Parts and Q&A

Q: Where is the knock sensor located and How to remove and install on 2010 Mazda 3?
A: The block has a knock sensor on its front side behind the intake manifold. Begin with taking out the battery cover and cable of negative. Firstly, take out intake manifold, disconnect the electrical connector of knock sensor and take away the sensor. To install one, reverse the procedure and screw the bolt.