2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L
2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L is a set of four precision oxygen sensors designed for accurate air-fuel ratio monitoring. Priced at $40.56, it ensures reliable engine performance and emissions control for Cadillac CTS and Saturn Vue models.
● In stock
Buy at Lab Work Auto →Price and availability may change. Click to see current details on Lab Work Auto.
Key features
- Precision technical ceramic sensing element
- Factory-fitted connector for easy installation
- Extensively tested for reliability
- Direct fit for 2003-2004 Cadillac CTS 3.2L
- Includes 2 upper and 2 under O2 sensors
- OEM-matching design and performance
- Supports ECU diagnostics and MIL reset
Pros
- +Complete set saves time and cost
- +Plug-and-play installation
- +Improves fuel efficiency and emissions
- +Reliable signal output
- +Backed by replacement or refund policy
Cons
- −Limited to specific vehicle models
- −No installation tools included
- −Requires basic mechanical skill
About 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L
What is 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L?
This product is a complete set of four oxygen sensors—two upstream (pre-catalytic) and two downstream (post-catalytic)—engineered specifically for 2003–2004 Cadillac CTS 3.2L and compatible 2002–2003 Saturn Vue 3.0L vehicles. These sensors monitor oxygen levels in exhaust gases to help the engine control unit (ECU) maintain optimal air-fuel mixture, improving fuel efficiency, reducing emissions, and preventing check engine lights due to sensor failure.
Key features
- Precision Sensing Element — Made with premier technical ceramics for accurate, stable oxygen detection.
- Factory-Fitted Connector — Ensures plug-and-play installation without wiring modifications.
- Extensively Tested — Each unit undergoes rigorous quality checks during manufacturing.
- Direct Fit — Matches OEM specifications for 2003–2004 Cadillac CTS 3.2L and 2002–2003 Saturn Vue 3.0L.
- Durable Construction — Built to withstand high-temperature exhaust environments.
- Includes All Necessary Sensors — Complete set of two upper and two lower O2 sensors.
- Diagnostic Support — Helps prevent or resolve oxygen-related DTCs and MIL illumination.
Who is 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L for?
This sensor set is ideal for Cadillac CTS and Saturn Vue owners experiencing check engine lights, poor fuel economy, or failed emissions tests due to faulty oxygen sensors. It's suited for DIY mechanics with basic tools and knowledge of exhaust system components. Professional technicians will also appreciate the reliable performance and OEM-matching design.
How does 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L compare?
Compared to generic or single-sensor replacements, this complete kit offers better value and compatibility assurance. Unlike universal sensors requiring splicing, these come with factory connectors for direct installation. They match the performance of OEM units at a lower cost, outperforming basic aftermarket sensors in durability and signal accuracy, especially in high-heat exhaust environments.
Best use cases
- →Replacing failed O2 sensors in Cadillac CTS
- →Fixing check engine light due to O2 codes
- →Improving fuel economy in Vue 3.0L
- →Passing emissions testing
- →Routine maintenance on 3.2L V6 engines
Is 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L right for you?
This oxygen sensor set is best for Cadillac CTS and Saturn Vue owners with 3.2L or 3.0L engines facing sensor-related check engine lights or poor performance. Ideal for DIYers with basic tools and moderate mechanical knowledge. Alternatives include single-sensor purchases or universal types requiring wiring, but this kit offers better compatibility and ease of installation.
How it compares: Compared to universal O2 sensors, this set offers plug-and-play installation and superior reliability. It outperforms basic aftermarket units in signal accuracy and durability, matching OEM performance at a lower price than dealership parts.
More from Lab Work Auto
#63P-81950-00-00 TRIM RELAY For YAMAHA OUTBOARD F150 & 250 Part
$17.80
(4 pcs) For Ford F-150 Bed Interface Plates Standard Tie Down FL3Z9928408AB
$16.82
-6 An X 5/16-24 O Ring Hydroboost Spittier/Return Port Fitting Car Accessories
$8.20
-6AN AN6 Fuel Adapter Fitting to 3/8 Quick Connect LS W/ Clip Female Black GM
$7.91Frequently Asked Questions
What vehicles fit the 2 Upper + 2 Under Oxygen O2 02 Sensor?
▾
This sensor set fits 2003–2004 Cadillac CTS 3.2L and 2002–2003 Saturn Vue 3.0L models. It is designed as a direct replacement with factory connectors and OEM-matching specifications for reliable performance.
Does this include both upstream and downstream sensors?
▾
Yes, the kit includes two upstream (pre-cat) and two downstream (post-cat) oxygen sensors, providing a complete replacement set for both banks of the exhaust system on compatible vehicles.
How do I know if my oxygen sensor is failing?
▾
Common signs include a check engine light, poor fuel economy, rough idling, and failed emissions tests. Diagnostic trouble codes like P0135 or P0141 often indicate O2 sensor issues requiring replacement.
Is professional installation required?
▾
No, the factory-fitted connector allows DIY installation with basic tools. However, working near hot exhaust components requires caution. A 22mm oxygen sensor socket is recommended for easier removal.
Can I return the sensors if they don’t work?
▾
Yes, Lab Work Auto offers a replacement or refund if the sensor fails to function properly. Customers are asked to provide a voltmeter video if performance issues occur upon testing.
How much does 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L cost?
▾
2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L is $40.56 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L in stock at Lab Work Auto?
▾
Yes, 2 Upper + 2 Under Oxygen O2 02 Sensor For 2003-2004 Cadillac CTS 3.2L is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-010622