2021 Subaru Impreza Ignition Sensors

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Keep Your 2021 Subaru Impreza in Top Shape with a Quality Ignition Sensor

When it comes to maintaining or upgrading your 2021 Subaru Impreza, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Ignition Sensor for your Impreza. We currently carry a top Ignition Sensor in stock that is built to last. Whether you’re replacing a damaged Ignition Sensor or looking to upgrade, our selection for the 2021 Subaru Impreza ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Ignition Coils and Boots and Spark Plugs to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 2021 Subaru Impreza running smoothly and looking great.

Essential 2021 Subaru Impreza Ignition Sensors

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, EKA1047 (Part No.EKA1047)

Carquest Ignition Knock (Detonation) Sensor, EKA1047

from

$157.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Carquest Premium – Carquest Knock Sensor, SBC3964 (Part No.SBC3964)

Carquest Knock Sensor, SBC3964

from

$92.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBC3742 (Part No.SBC3742)

Carquest Ignition Knock (Detonation) Sensor, SBC3742

from

$103.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA4303 (Part No.SBA4303)

Carquest Ignition Knock (Detonation) Sensor, SBA4303

from

$95.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3677 (Part No.SBA3677)

Carquest Ignition Knock (Detonation) Sensor, SBA3677

from

$49.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Carquest Premium – Carquest Knock Sensor, SBC3818 (Part No.SBC3818)

Carquest Knock Sensor, SBC3818

from

$76.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA4304 (Part No.SBA4304)

Carquest Ignition Knock (Detonation) Sensor, SBA4304

from

$92.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Carquest Premium – Carquest Knock Sensor, SBC3762 (Part No.SBC3762)

Carquest Knock Sensor, SBC3762

from

$83.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Knock Sensor, EKC1038 (Part No.EKC1038)

Carquest Knock Sensor, EKC1038

from

$157.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Dorman – Dorman Engine Knock Sensor And Harness Kit, 962-701 (Part No.962-701)

Dorman Engine Knock Sensor And Harness Kit, 962-701

from

$63.99
Check engine light on and vehicle running rough. Could be a failed knock sensor. This ignition knock sensor kit combines both necessary sensors and the wiring harness that joins them for a complete repair in one package.
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Carquest Premium – Carquest Knock Sensor, SBC3761 (Part No.SBC3761)

Carquest Knock Sensor, SBC3761

from

$59.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Most Popular Knock Sensor for 2021 Subaru Imprezas

Enhance your 2021 Subaru Impreza with this popular Knock Sensor we have in stock, for $63.99.

Dorman – Dorman Engine Knock Sensor And Harness Kit, 962-701 (Part No.962-701)

Dorman Engine Knock Sensor And Harness Kit, 962-701

from

$63.99
Check engine light on and vehicle running rough. Could be a failed knock sensor. This ignition knock sensor kit combines both necessary sensors and the wiring harness that joins them for a complete repair in one package.
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FAQs for 2021 Subaru Impreza Ignition Sensors

What’s the price range for 2021 Subaru Impreza Ignition Sensors?

We currently have just one Ignition Sensors for the 2021 Subaru Impreza in stock: Dorman Engine Knock Sensor And Harness Kit, 962-701 and it costs $63.99.

Does Advance Auto Parts sell Ignition Sensors for other Subaru Impreza model years?

Yes, we carry Ignition Sensors for 27 model years of Subaru Imprezas between 1995 and 2023. The following model years are the most popular for Ignition Sensor purchases: 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, and 2008.

Does Advance Auto Parts sell Ignition Sensors for any other 2021 Subaru models?

Yes. We stock Ignition Sensors for 5 other popular 2021 Subaru models. Some of the most popular are 2021 Forester Ignition Sensors, 2021 WRX Ignition Sensors, 2021 Crosstrek Ignition Sensors, 2021 WRX STI Ignition Sensors, and 2021 Legacy Ignition Sensors.

What types of Ignition Sensors do you sell for my 2021 Subaru Impreza?

We currently have just 1 Ignition Sensor in stock for a 2021 Subaru Impreza, and as of 8/2/26, it is a Knock Sensor.

Can I get help with 2021 Subaru Impreza Ignition Sensor orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Subaru Ignition Sensors and more.

What is your return policy for Subaru Impreza Ignition Sensors?

Advance Auto Parts keeps returns simple. For new Subaru Impreza Ignition Sensors and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.