Delphi ES20038 Oxygen Sensor - Front Right, Left or Right

Delphi ES20038 Oxygen Sensor Overview

The Delphi ES20038 is a heated oxygen sensor built for specific Ford and Mazda applications that require a 300 mm overall length and a 4-wire square connector. It draws on Delphi’s OE heritage and decades of supplier experience, giving you an aftermarket replacement shaped by original-equipment knowledge.

Compatible With 1992-2006 Ford Probe, Mazda 626, Mazda 929, Mazda MX-6, and Mazda MPV applications listed below, including front right, left, right, and position-specific installs. If you are searching for a Delphi ES20038 oxygen sensor for a Mazda MPV front right or a Ford Probe oxygen sensor replacement, this part matches the confirmed fitment data.

Key Features

• Heated oxygen sensor for faster signal response after startup
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size
• 300.0 mm overall length
• Includes oxygen sensor and instruction sheet
• Position-specific fitment for front, front right, left, and right locations

Detailed Description

The Delphi ES20038 oxygen sensor is engineered for emission control service where accurate exhaust feedback matters. Its heated design helps the sensor reach operating temperature more quickly, supporting consistent operation in the vehicle’s fuel and emissions management system. The 4-wire configuration, square connector, and 18 x 1.5 mm thread size make it a direct-match replacement for the confirmed applications, including Mazda 626, Mazda MX-6, Mazda 929, Mazda MPV, and Ford Probe models.

This part cross-references Bosch 15708 for the same application. The Delphi ES20038 also aligns with multiple OE-style interchange numbers used across the listed Ford Probe and Mazda applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel economy caused by faulty exhaust feedback
• Rough idle or drivability issues tied to sensor signal errors
• Emission test failures caused by a worn or slow-responding sensor

Installation Notes and Tips

Verify the exact position on your vehicle before ordering, since this part is listed for front, front right, left, and right locations depending on application. Confirm the 300 mm overall length, 4-wire layout, square connector, and 18 x 1.5 mm thread size against the original sensor before installation. For best results, compare the vehicle’s emission configuration, including California-emissions notes where listed, and follow the included instruction sheet during replacement.

Quality Assurance

Delphi builds this replacement with OE heritage and knowledge drawn from 100 years of original-equipment experience and supplier relationships with major automakers. That background is reflected in the ES20038’s fitment-focused design and emission-system application coverage.

• Fits 2002-2006 Mazda MPV, front right
• Fits 1994-1995 Ford Probe, N/A
• Fits 1993-1995 Ford Probe, N/A
• Fits 1994-1995 Mazda 626, left
• Fits 1993-1995 Mazda 626, N/A
• Fits 1992-1995 Mazda 929, right
• Fits 1994-1995 Mazda MX-6, left
• Fits 1993-1995 Mazda MX-6, N/A
• Fits 1993 Ford Probe, N/A
• Fits 1993 Mazda 626, N/A
• Fits 1993 Mazda MX-6, left