2003 Cadillac CTS Ignition Sensors

Please Select your Vehicle to See Exact Fit Parts

Keep Your 2003 Cadillac CTS in Top Shape with a Quality Ignition Sensor

When it comes to maintaining or upgrading your 2003 Cadillac CTS, 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 CTS. 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 2003 Cadillac CTS 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 2003 Cadillac CTS running smoothly and looking great.

Essential 2003 Cadillac CTS Ignition Sensors

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3687 (Part No.SBA3687)

Carquest Ignition Knock (Detonation) Sensor, SBA3687

from

$34.99
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.
See More

Delphi – Delphi Knock Sensor, AS10261 (Part No.AS10261)

Delphi Knock Sensor, AS10261

from

$21.99
Delphi’s ever growing portfolio of high quality vehicle sensors are backed by stringent OE development and product validation methods. We offer a wide range of sensors, including ABS, camshaft, crankshaft, knock, EGT, MAP, temperature, throttle position, and vehicle speed sensors for a variety of vehicle applications. All of our sensors are tested and calibrated to OE standards, ensuring accurate readings, which helps to reduce comebacks.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3698 (Part No.SBA3698)

Carquest Ignition Knock (Detonation) Sensor, SBA3698

from

$29.99
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.
See More

GM Genuine Parts – GM Genuine Parts Ignition Knock (Detonation) Sensor, 12623095 (Part No.12623095)

GM Genuine Parts Ignition Knock (Detonation) Sensor, 12623095

from

$35.99
ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
See More

Delphi – Delphi Knock Sensor, AS10262 (Part No.AS10262)

Delphi Knock Sensor, AS10262

from

$41.49
Delphi’s ever growing portfolio of high quality vehicle sensors are backed by stringent OE development and product validation methods. We offer a wide range of sensors, including ABS, camshaft, crankshaft, knock, EGT, MAP, temperature, throttle position, and vehicle speed sensors for a variety of vehicle applications. All of our sensors are tested and calibrated to OE standards, ensuring accurate readings, which helps to reduce comebacks.
See More

Encore Automotive – Encore Automotive Knock Sensor, Genuine OE, SKS-D20002 (Part No.SKS-D20002)

Encore Automotive Knock Sensor, Genuine OE, SKS-D20002

from

$49.99
Encore Automotive Genuine OE knock sensor detects excessive/unusual pulses caused by the engine ignition and makes proper adjustments to reduce the risk of damaging pistons. Encore Automotive is dedicated to bringing the latest original equipment technologies to the Aftermarket to provide the highest overall value.
See More

Delphi – Delphi Knock Sensor, AS10017 (Part No.AS10017)

Delphi Knock Sensor, AS10017

from

$93.99
Delphi’s ever growing portfolio of high quality vehicle sensors are backed by stringent OE development and product validation methods. We offer a wide range of sensors, including ABS, camshaft, crankshaft, knock, EGT, MAP, temperature, throttle position, and vehicle speed sensors for a variety of vehicle applications. All of our sensors are tested and calibrated to OE standards, ensuring accurate readings, which helps to reduce comebacks.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBC3654 (Part No.SBC3654)

Carquest Ignition Knock (Detonation) Sensor, SBC3654

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.
See More

NTK – NTK Ignition Knock (Detonation) Sensor, ID0050 (Part No.ID0050)

NTK Ignition Knock (Detonation) Sensor, ID0050

from

$41.99
The Ignition Knock (Detonation) Sensor monitors vibrations caused by engine knock or detonation to alter the ignition timing and prevent detonation. A piezoelectric crystal generates a varying voltage based upon engine vibration intensity to delay ignition timing to help prevent severe and costly engine damage. Reasons for replacement include check engine light illumination, engine hesitation, poor fuel economy or failed emissions test.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3656 (Part No.SBA3656)

Carquest Ignition Knock (Detonation) Sensor, SBA3656

from

$25.99
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.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor with Bolt, EKC1007 (Part No.EKC1007)

Carquest Ignition Knock (Detonation) Sensor with Bolt, EKC1007

from

$29.99
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.
See More

GM Genuine Parts – GM Genuine Parts Ignition Knock (Detonation) Sensor, 213-1576 (Part No.213-1576)

GM Genuine Parts Ignition Knock (Detonation) Sensor, 213-1576

from

$31.99
Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3819 (Part No.SBA3819)

Carquest Ignition Knock (Detonation) Sensor, SBA3819

from

$75.99
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.
See More

Encore Automotive – Encore Automotive Knock Sensor, Genuine OE, SKS-D20003 (Part No.SKS-D20003)

Encore Automotive Knock Sensor, Genuine OE, SKS-D20003

from

$33.99
Encore Automotive Genuine OE knock sensor detects excessive/unusual pulses caused by the engine ignition and makes proper adjustments to reduce the risk of damaging pistons. Encore Automotive is dedicated to bringing the latest original equipment technologies to the Aftermarket to provide the highest overall value.
See More

NTK – NTK Ignition Knock (Detonation) Sensor, ID0300 (Part No.ID0300)

NTK Ignition Knock (Detonation) Sensor, ID0300

from

$24.99
The Ignition Knock (Detonation) Sensor monitors vibrations caused by engine knock or detonation to alter the ignition timing and prevent detonation. A piezoelectric crystal generates a varying voltage based upon engine vibration intensity to delay ignition timing to help prevent severe and costly engine damage. Reasons for replacement include check engine light illumination, engine hesitation, poor fuel economy or failed emissions test.
See More

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3734 (Part No.SBA3734)

Carquest Ignition Knock (Detonation) Sensor, SBA3734

from

$43.99
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.
See More

Carquest Premium – Carquest Knock (Detonation) Sensor, SBA8009 (Part No.SBA8009)

Carquest Knock (Detonation) Sensor, SBA8009

from

$37.99
Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. These sensors use the highest quality piezoceramic elements manufactured to tight tolerances for increased durability and accuracy. These Knock Sensors are designed to meet and exceed OEM specifications.
See More

GM Genuine Parts – GM Genuine Parts Ignition Knock (Detonation) Sensor, 213-3521 (Part No.213-3521)

GM Genuine Parts Ignition Knock (Detonation) Sensor, 213-3521

from

$99.99
ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
See More

Bosch – Bosch Knock Sensor, 0261231174 (Part No.0261231174)

Bosch Knock Sensor, 0261231174

from

$28.99
Bosch OE quality knock sensors for optimum engine protection and fuel consumption reduction up to 9%
See More

Most Popular Knock Sensor for 2003 Cadillac CTSs

Enhance your 2003 Cadillac CTS with this popular Knock Sensor we have in stock, for $75.99.

Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3819 (Part No.SBA3819)

Carquest Ignition Knock (Detonation) Sensor, SBA3819

from

$75.99
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.
See More

FAQs for 2003 Cadillac CTS Ignition Sensors

What’s the price range for 2003 Cadillac CTS Ignition Sensors?

We currently have just one Ignition Sensors for the 2003 Cadillac CTS in stock: Carquest Ignition Knock (Detonation) Sensor, SBA3819 and it costs $75.99.

Does Advance Auto Parts sell Ignition Sensors for other Cadillac CTS model years?

Yes, we carry Ignition Sensors for 15 model years of Cadillac CTSs between 2004 and 2019. The following model years are the most popular for Ignition Sensor purchases: 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, and 2011.

Does Advance Auto Parts sell Ignition Sensors for any other 2003 Cadillac models?

Yes. We stock Ignition Sensors for 4 other popular 2003 Cadillac models. Some of the most popular are 2003 Escalade Ignition Sensors, 2003 Escalade ESV Ignition Sensors, 2003 Escalade EXT Ignition Sensors, 2003 DeVille Ignition Sensors, and 2003 Seville Ignition Sensors.

What types of Ignition Sensors do you sell for my 2003 Cadillac CTS?

We currently have just 1 Ignition Sensor in stock for a 2003 Cadillac CTS, and as of 8/2/26, it is a Knock Sensor.

Can I get help with 2003 Cadillac CTS Ignition Sensor orders?

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

What is your return policy for Cadillac CTS Ignition Sensors?

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