How to replace the knock sensor on 2006 Mazda 6?

On four-cylinder models, the knock sensor is found on the front side of the block behind the intake manifold. Unscrew the negative battery terminal, peel off the intake manifold and the knock sensor. In V6 cars, detach the battery, lift the vehicle and repeat the process. In 3.7L models, take out intake manifolds and 2 knock sensors and put back in that order.

Genuine 2006 Mazda 6 Knock Sensor

Engine Knock Sensor

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3 Knock Sensors found

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2006 Mazda 6 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 2006 Mazda 6 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
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2006 Mazda 6 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 2006 Mazda 6 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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2006 Mazda 6 Knock Sensor Part Number: AJ57-18-921A
Product Specifications
- Other Name: Sensor, Knock
- Item Weight: 0.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: AJ57-18-921A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 2006 Mazda 6 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS

2006 Mazda 6 Knock Sensor Parts and Q&A

Q: How to replace the knock sensor on 2006 Mazda 6?
A: On four-cylinder models, the knock sensor is found on the front side of the block behind the intake manifold. Unscrew the negative battery terminal, peel off the intake manifold and the knock sensor. In V6 cars, detach the battery, lift the vehicle and repeat the process. In 3.7L models, take out intake manifolds and 2 knock sensors and put back in that order.