Genuine Mazda Knock Sensor

Engine Knock Sensor

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26 Knock Sensors found

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Mazda Knock Sensor
Part Number: LF01-18-921
$39.75 MSRP: $53.01
You Save: $13.26 (26%)
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Product Specifications
- Other Name: Sensor, Knock
- Replaces: 1F20-18-921A, 1F20-18-921
Fits the following Mazda Models:
- 3 | 2010-2013, 2004-2006 | i, S, SP23 | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
- 5 | 2012-2015, 2006-2007 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
- 6 | 2003-2013 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
- B2300 | 2001-2009 | Base, SE, SX | 4 Cyl 2.3 L GAS
- CX-7 | 2010-2012 | Sport, SV, Touring | 4 Cyl 2.5 L GAS
- MX-5 Miata | 2006-2015 | 25th Anniversary Edition, Base, Club, Club Spec, Grand Touring, Special Edition, Sport, SV, Touring | 4 Cyl 2.0 L GAS
- Tribute | 2008-2011, 2005-2006 | Hybrid, i, S | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mazda Knock Sensor
Part Number: PE01-18-921
$57.80 MSRP: $77.08
You Save: $19.28 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 3 | 2012-2018 | Grand Touring, i, i Grand Touring, I Sport, i SV, I Touring, Mazdaspeed, S, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
- 6 | 2014-2017 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-3 | 2016-2018 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
- CX-5 | 2013-2018 | Grand Select, Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- MX-5 Miata | 2016-2018 | Club, Grand Touring, RF Club, RF Grand Touring, Sport | 4 Cyl 2.0 L GAS
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Mazda Knock Sensor
Part Number: P31E-18-921
$86.84 MSRP: $115.80
You Save: $28.96 (26%)
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Product Specifications
- Other Name: Sensor, Knock
- Replaces: P32E-18-921
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- 6 | 2018-2021 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-3 | 2019-2021 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
- CX-30 | 2020-2023 | 2.5 S, 2.5 S Carbon Edition, 2.5 Turbo, Base, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
- CX-5 | 2019-2024 | 2.5 S, 2.5 S Carbon Edition, 2.5 Turbo, 2.5 Turbo Signature, Carbon Edition, Carbon Edition Turbo, Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-50 | 2023-2024 | 2.5 S, 2.5 Turbo | 4 Cyl 2.5 L GAS
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
- MX-5 Miata | 2019-2023 | 100th Anniversary Special Edition, Club, Grand Touring, RF 100th Anniversary Special Edition, RF Club, RF Grand Touring, Sport | 4 Cyl 2.0 L GAS
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Mazda Knock Sensor
Part Number: LF02-18-921
$88.44 MSRP: $117.94
You Save: $29.50 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 3 | 2007-2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
- 5 | 2008-2010 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS
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Mazda Knock Sensor
Part Number: N3H1-18-921A
$101.49 MSRP: $135.35
You Save: $33.86 (26%)
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Product Specifications
- Other Name: Sensor, Knock
- Replaces: N3H1-18-921
Fits the following Mazda Models:
- RX-8 | 2004-2011 | 40th Anniversary Edition, Base, Grand Touring, R3, Shinka, Sport, Touring | 2 Cyl 1.3 L GAS
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Mazda Knock Sensor
Part Number: L807-18-921
$105.99 MSRP: $141.34
You Save: $35.35 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 3 | 2007-2013 | Mazdaspeed, S | 4 Cyl 2.3 L GAS
- 6 | 2006-2007 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
- CX-7 | 2007-2012 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS
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Mazda Knock Sensor
Part Number: GY01-18-921C
$174.33 MSRP: $232.48
You Save: $58.15 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- MPV | 2000-2001 | DX, ES, LX | 6 Cyl 2.5 L GAS
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Mazda Knock Sensor
Part Number: GY02-18-921A
$180.35 MSRP: $240.51
You Save: $60.16 (26%)
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Product Specifications
- Other Name: Sensor, Knock (Mpvm)
- Replaces: GY02-18-921
Fits the following Mazda Models:
- MPV | 2002-2006 | ES, LX, LX-SV | 6 Cyl 3.0 L GAS
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Mazda Knock Sensor
Part Number: 1F21-18-921
$29.89 MSRP: $39.86
You Save: $9.97 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- B3000 | 2004-2007 | Base, DS, SE | 6 Cyl 3.0 L GAS
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Mazda Knock Sensor
Part Number: FS7N-18-921A
$171.91 MSRP: $229.27
You Save: $57.36 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- Protege | 2001-2003 | DX, ES, LX, Mazdaspeed, MP3 | 4 Cyl 2.0 L GAS
- Protege5 | 2002-2003 | Base | 4 Cyl 2.0 L GAS
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Mazda Knock Sensor
Part Number: KJ01-18-921A
$185.33 MSRP: $247.15
You Save: $61.82 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- Millenia | 1995-2002 | Base, Millennium Edition, S | 6 Cyl 2.3 L GAS
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Mazda Knock Sensor
Part Number: FP39-18-921
$192.49 MSRP: $256.71
You Save: $64.22 (26%)
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Product Specifications
- Replaces: FSD7-18-921C
Fits the following Mazda Models:
- 626 | 1998-2002 | DX, ES, LX | 4 Cyl 2.0 L GAS
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Mazda Knock Sensor
Part Number: KL01-18-921B
$207.55 MSRP: $276.80
You Save: $69.25 (26%)
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Product Specifications
- Other Name: Sensor
Fits the following Mazda Models:
- 626 | 1993-2002 | DX, ES, LX | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- MX-3 | 1992-1995 | Base, GS, SE | 4 Cyl 1.6 L GAS, 6 Cyl 1.8 L GAS
- MX-6 | 1993-1997 | Base, LS, M Edition | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- Millenia | 1995-1996 | Base, L | 6 Cyl 2.5 L GAS
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Mazda Knock Sensor
Part Number: JEB3-18-921A
$221.31 MSRP: $295.15
You Save: $73.84 (26%)
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Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- Miata | 1999-2005 | 10th Anniversary, Base, LS, Mazdaspeed, SE, Shinsen | 4 Cyl 1.8 L GAS
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Mazda Knock Sensor
Part Number: N3A1-18-921A
$301.28 MSRP: $401.77
You Save: $100.49 (26%)
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Product Specifications
- Other Name: Sensor
- Replaces: N3A1-18-921
Fits the following Mazda Models:
- RX-7 | 1993-1995 | Base, R1, R2, Touring | 2 Cyl 1.3 L GAS
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Mazda Knock Sensor
Part Number: 1F22-18-921
Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- B4000 | 2004-2009 | Base, DS, SE | 6 Cyl 4.0 L GAS
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Mazda Knock Sensor
Part Number: AJ03-18-921A
Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- Tribute | 2001-2006 | DX, ES, LX, S | 6 Cyl 3.0 L GAS
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Mazda Knock Sensor
Part Number: AJ57-18-921A
Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 6 | 2003-2008 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda Knock Sensor
Part Number: CY01-18-921
Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 6 | 2009-2013 | S | 6 Cyl 3.7 L GAS
- CX-9 | 2007-2015 | Grand Touring, Sport, Touring | 6 Cyl 3.5 L GAS, 6 Cyl 3.7 L GAS
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Mazda Knock Sensor
Part Number: JE49-18-921A
Product Specifications
- Other Name: Sensor, Knock
Fits the following Mazda Models:
- 929 | 1992-1993 | Base | 6 Cyl 3.0 L GAS

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Mazda Knock Sensor

When fuel is not ignited correctly, the regular cycle of the engine will be interrupted, which might damage some parts inside it. For this reason, a knock sensor is installed, a piezo-electric component designed to allow the engine to run with ignition timing as far ahead as possible. The Mazda knock sensor picks up a rapid change in pressure on the cylinder walls and sends this message to the engine control unit for adjustment of ignition time. It is essential to check regularly and replace knock sensors if necessary.

Whenever you need replacements, opt for genuine Mazda Knock Sensors. Because they meet the manufacturer's criteria, it guarantees that replacements fit perfectly. Thus, these make better choices for people who care about driving. Why should you shop at MazdaPartsNow.com? We sell genuine Mazda Knock Sensors. In our online catalog, there is a wide range of different parts. These are delivered directly from authorized Mazda dealers only so that customers can be sure of their security throughout any transaction while using our website. Furthermore, you can also quickly search for OEM parts you want because of our user-friendly site navigation. Choose us for a genuine Mazda Knock Sensor that keeps your car running like new.