Delphi ES20037 Oxygen Sensor

Delphi ES20037 Oxygen Sensor Overview

Delphi ES20037 is a heated oxygen sensor built for direct-fit replacement in select Chevrolet, Suzuki, Mazda, and Ford applications. With OE heritage from Delphi and a 4-wire design, it supports accurate exhaust feedback for vehicles such as the Chevrolet Aveo, Mazda 626, and Mazda MX-6.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire configuration with square connector shape
• 18 x 1.5 mm thread size for the listed applications
• 480.0 overall length for fitment-specific routing
• Includes oxygen sensor and instruction sheet
• Delphi ES20037 cross-references Bosch 15148 and DENSO Auto Parts 234-4067 for the same application

Detailed Description

Delphi ES20037 is engineered for vehicles that require a heated O2 sensor with the specified connector, thread, and lead length. Delphi draws on more than a century of OE experience, and that background is reflected in the sensor’s construction and application coverage. This part is listed for front, front right, rear, left, and right positions depending on the vehicle, including 2006-2008 Chevrolet Aveo front, 2007-2008 Chevrolet Aveo5 front, 2000 Mazda 626 front right, 1996-1997 Mazda 626 rear, and 1993-1997 Mazda MX-6 rear or right positions.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream or downstream sensor
• Rough idle or drivability issues tied to exhaust feedback errors
• Reduced fuel control accuracy caused by slow sensor response
• Emission test failures linked to a faulty heated oxygen sensor

Installation Notes and Tips

Verify the position on your vehicle before ordering, since ES20037 is used in multiple locations across different applications. Confirm the 480 mm overall length, 4-wire layout, square connector, and 18 x 1.5 mm thread size against the original sensor. For fitment-specific placement, use the application details for your Chevrolet Aveo, Mazda 626, Mazda 929, Mazda MX-6, Ford Probe, Suzuki Verona, or Aveo5.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and sensor performance across the listed applications.