2003 Cadillac CTS Oxygen Sensors

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Keep Your 2003 Cadillac CTS in Top Shape with Quality Oxygen Sensors

Whether you’re repairing or upgrading your Oxygen Sensor, using high-quality parts is key to keeping your 2003 Cadillac CTS looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Oxygen Sensor Connectors and Oxygen Sensors. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Competitive Prices and Extensive Inventory

The average price for a 2003 Cadillac CTS Oxygen Sensor at Advance Auto Parts is around $103.28, with a range that starts at $66.99 and goes up to $142.99. With 7 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like "Bosch Oxygen Sensor: 4 Wire, 12.2"" Long, Heated, Exact Fit, 16379", "Bosch Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Exact Fit, 16378", and GM Genuine Parts Oxygen Sensor: 4 Wires, Heated, Exact Fit, 213-1516 start at just $66.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Oxygen Sensor, don’t forget to check out other key components like Fuel Pumps and Gas Caps. At Advance Auto Parts, we’re here to help you keep your 2003 Cadillac CTS in peak condition, inside and out.

Essential 2003 Cadillac CTS Oxygen Sensors

GM Genuine Parts – GM Genuine Parts Heated Oxygen Sensor, 213-3867 (Part No.213-3867)

GM Genuine Parts Heated Oxygen Sensor, 213-3867

from

$105.99
GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the airfuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
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Bosch – "Bosch Oxygen Sensor: 4 Wire, 25.87"" Long, Heated, Universal, 15741" (Part No.15741)

"Bosch Oxygen Sensor: 4 Wire, 25.87"" Long, Heated, Universal, 15741"

from

$69.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
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Bosch – "Bosch Wideband Oxygen Sensor: 5 Wire, 14.84"" Long, Heated, Exact Fit, 17300" (Part No.17300)

"Bosch Wideband Oxygen Sensor: 5 Wire, 14.84"" Long, Heated, Exact Fit, 17300"

from

$139.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
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NTK – "NTK Switching Oxygen Sensor: 4 Wire, 12.25"" Long, Heated, Direct Fit, 21088" (Part No.21088)

"NTK Switching Oxygen Sensor: 4 Wire, 12.25"" Long, Heated, Direct Fit, 21088"

from

$61.99
NGK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.
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Bosch – "Bosch Oxygen Sensor: 4 Wire, 24.02"" Long, Heated, Universal, 15730" (Part No.15730)

"Bosch Oxygen Sensor: 4 Wire, 24.02"" Long, Heated, Universal, 15730"

from

$89.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
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GM Genuine Parts – GM Genuine Parts Oxygen Sensor: 4 Wires, 347 mm Long, Heated, Exact Fit, 213-3137 (Part No.213-3137)

GM Genuine Parts Oxygen Sensor: 4 Wires, 347 mm Long, Heated, Exact Fit, 213-3137

from

$129.99
GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
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NTK – "NTK Titania Oxygen Sensor: 3 Wire, 10.75"" Long, Heated, Direct Fit, 27016" (Part No.27016)

"NTK Titania Oxygen Sensor: 3 Wire, 10.75"" Long, Heated, Direct Fit, 27016"

from

$65.99
NGK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air-Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how rich or lean an engine is running and make continuous and precise adjustments of the air-fuel mixture to stay closest to stoichiometric, providing the best possible combustion and fewest emissions. A ceramics company at our core, uses state-of-the art technology enabling complete control of the ceramics used in our wideband oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.
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DENSO – "DENSO Oxygen Sensor: Upstream, 4 Wire, 15.04"" Long, Heated, Exact Fit, 234-4763" (Part No.234-4763)

"DENSO Oxygen Sensor: Upstream, 4 Wire, 15.04"" Long, Heated, Exact Fit, 234-4763"

from

$83.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
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GM Genuine Parts – GM Genuine Parts Heated Oxygen Sensor, 213-3538 (Part No.213-3538)

GM Genuine Parts Heated Oxygen Sensor, 213-3538

from

$139.99
GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the airfuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
See More

NTK – "NTK Switching Oxygen Sensor: 4 Wire, 11.75"" Long, Heated, Direct Fit, 21081" (Part No.21081)

"NTK Switching Oxygen Sensor: 4 Wire, 11.75"" Long, Heated, Direct Fit, 21081"

from

$47.99
NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. NTK is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.
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DENSO – "DENSO Oxygen Sensor: Downstream, 4 Wire, 20.59"" Long, Heated, Exact Fit, 234-4816" (Part No.234-4816)

"DENSO Oxygen Sensor: Downstream, 4 Wire, 20.59"" Long, Heated, Exact Fit, 234-4816"

from

$96.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
See More

DENSO – "DENSO Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Exact Fit, 234-4668" (Part No.234-4668)

"DENSO Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Exact Fit, 234-4668"

from

$73.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
See More

Bosch – "Bosch Oxygen Sensor: 4 Wire, 9.76"" Long, Heated, Exact Fit, 16746" (Part No.16746)

"Bosch Oxygen Sensor: 4 Wire, 9.76"" Long, Heated, Exact Fit, 16746"

from

$61.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
See More

DENSO – "DENSO Oxygen Sensor: 4 Wire, 16.93"" Long, Heated, Exact Fit, 234-4112" (Part No.234-4112)

"DENSO Oxygen Sensor: 4 Wire, 16.93"" Long, Heated, Exact Fit, 234-4112"

from

$71.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
See More

Carquest Premium – Carquest Multi-Use Connector, PTA3078 (Part No.PTA3078)

Carquest Multi-Use Connector, PTA3078

from

$92.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
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Carquest Premium – Carquest Multi-Use Connector, PTA1317 (Part No.PTA1317)

Carquest Multi-Use Connector, PTA1317

from

$79.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
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Carquest Premium – Carquest Multi-Use Connector, PTA1517 (Part No.PTA1517)

Carquest Multi-Use Connector, PTA1517

from

$53.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
See More

Carquest Premium – Carquest Oxygen Sensor Connector, PTA4002 (Part No.PTA4002)

Carquest Oxygen Sensor Connector, PTA4002

from

$47.49
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
See More

GM Genuine Parts – GM Genuine Parts 4-Way Female Gray Multi-Purpose Pigtail, PT1069 (Part No.PT1069)

GM Genuine Parts 4-Way Female Gray Multi-Purpose Pigtail, PT1069

from

$64.99
ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
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Carquest Premium – Carquest Multi-Use Connector, PTA1397 (Part No.PTA1397)

Carquest Multi-Use Connector, PTA1397

from

$41.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
See More

Carquest Premium – Carquest Multi-Use Connector, PTA1687 (Part No.PTA1687)

Carquest Multi-Use Connector, PTA1687

from

$47.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
See More

Most Popular Oxygen Sensor Connector for 2003 Cadillac CTSs

Enhance your 2003 Cadillac CTS with this popular Oxygen Sensor Connector we have in stock, for $92.99.

Carquest Premium – Carquest Multi-Use Connector, PTA3078 (Part No.PTA3078)

Carquest Multi-Use Connector, PTA3078

from

$92.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.
See More

Best-Selling 2003 Cadillac CTS Oxygen Sensors

Upgrade your CTS with one of our 6 best-selling Oxygen Sensors, earning an average 3.5 stars rating across 144 reviews.

Bosch – "Bosch Oxygen Sensor: 4 Wire, 24.92"" Long, Heated, Universal, 15733" (Part No.15733)

"Bosch Oxygen Sensor: 4 Wire, 24.92"" Long, Heated, Universal, 15733"

from

$92.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
See More

Bosch – "Bosch Oxygen Sensor: 4 Wire, 12.2"" Long, Heated, Exact Fit, 16379" (Part No.16379)

"Bosch Oxygen Sensor: 4 Wire, 12.2"" Long, Heated, Exact Fit, 16379"

from

$66.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
See More

Bosch – "Bosch Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Exact Fit, 16378" (Part No.16378)

"Bosch Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Exact Fit, 16378"

from

$89.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.
See More

GM Genuine Parts – GM Genuine Parts Oxygen Sensor: 4 Wires, Heated, Exact Fit, 213-1516 (Part No.213-1516)

GM Genuine Parts Oxygen Sensor: 4 Wires, Heated, Exact Fit, 213-1516

from

$129.99
GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
See More

NTK – "NTK Switching Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Direct Fit, 25727" (Part No.25727)

"NTK Switching Oxygen Sensor: 4 Wire, 15.75"" Long, Heated, Direct Fit, 25727"

from

$106.99
NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. NTK is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.
See More

DENSO – "DENSO Oxygen Sensor: 4 Wire, 15.79"" Long, Heated, Exact Fit, 234-4821" (Part No.234-4821)

"DENSO Oxygen Sensor: 4 Wire, 15.79"" Long, Heated, Exact Fit, 234-4821"

from

$142.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
See More

FAQs for 2003 Cadillac CTS Oxygen Sensors

What are the best-selling Oxygen Sensors for 2003 Cadillac CTSs?

Out of 7 Oxygen Sensors that fit 2003 Cadillac CTSs, the following parts are the top sellers:

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

The prices of Oxygen Sensors for the 2003 Cadillac CTS range from $66.99 up to $142.99 for the most premium parts.

What is the average price of an Oxygen Sensor for a 2003 Cadillac CTS?

The average price for Oxygen Sensors for the 2003 Cadillac CTS is $103.28. Keep in mind the variety of part types within our Oxygen Sensor category, where you are likely to find a wide range of prices across a variety of parts and components.

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

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

What are the cheapest Oxygen Sensors for my 2003 Cadillac CTS?

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

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

What are the top-rated Oxygen Sensors that fit the 2003 Cadillac CTS?

The one 2003 Cadillac CTS Oxygen Sensor we have in stock is the "Bosch Oxygen Sensor: 4 Wire, 12.2"" Long, Heated, Exact Fit, 16379". It costs $66.99.

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

As of 8/2/26, these are some of the most in-demand types of Oxygen Sensors for a 2003 Cadillac CTS:

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

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

What is your return policy for Cadillac CTS Oxygen Sensors?

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