Denso 234-4527 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4527

Denso 234-4527 is an OE Style heated oxygen sensor built for direct replacement on select Chevrolet Sonic, Chevrolet Cruze, Chevrolet Cruze Limited, and Saab 9-5 applications. It is engineered for specific fitment, stable signal output, and accurate exhaust monitoring in upstream and downstream positions where listed.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit, threaded mounting design
• 4-wire configuration with female connector
• Wiring harness length: 20.47
• Thread diameter: 0.708
• OE Style replacement built to match factory fit and function

OE Style Design Details

Denso’s OE Style line is built around exact replacement requirements, with attention to connector style, harness length, and mounting dimensions. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent engine management performance and long service life. This part number, 234-4527, is a direct-fit option for drivers replacing a worn upstream or downstream oxygen sensor on the listed vehicles.

This part cross-references ACDelco 213-4699 and Bosch 16349 for the same application.

Vehicle Fitment

• Fits 2017-2018 Chevrolet Sonic, Upstream
• Fits 2016 Chevrolet Cruze Limited, Upstream
• Fits 2012-2016 Chevrolet Sonic, Upstream
• Fits 2011-2015 Chevrolet Cruze, Upstream
• Fits 2010-2011 Saab 9-5, Downstream

Common Uses

• Replacing a failed upstream oxygen sensor on a Chevrolet Sonic or Chevrolet Cruze
• Addressing check engine light concerns related to oxygen sensor performance
• Restoring air-fuel ratio feedback for engine control
• Correcting poor fuel economy caused by inaccurate exhaust readings
• Replacing a sensor with damaged wiring, connector wear, or contamination

Installation Notes

Verify the connector style, wire count, mounting type, and position before installation. This sensor uses a threaded mount and a female connector, so matching the original harness and exhaust bung is important for proper fit. Confirm upstream or downstream placement against the vehicle application before ordering.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and consistent performance. The OE Style design is intended to provide the correct fit and function for the listed Chevrolet Sonic, Chevrolet Cruze, Chevrolet Cruze Limited, and Saab 9-5 applications.