Delphi ES20014 Oxygen Sensor - Center, Front, Rear or Rear Right

Delphi ES20014 Oxygen Sensor Overview

The Delphi ES20014 is a heated oxygen sensor built for precise exhaust monitoring and OE-style replacement performance. With Delphi’s century of original-equipment experience behind it, this sensor brings application-specific engineering to a wide range of Ford, Mazda, Mercury, and Jaguar vehicles.

Compatible With 1990-2010 Ford Mustang, Ford Taurus, Mazda CX-9, Mazda B-series trucks, Mercury Sable, and other listed applications, the ES20014 is a direct-fit oxygen sensor for front, rear, center, and rear-right positions where the 400 mm lead length is specified.

Key Features

• Heated oxygen sensor for faster operating temperature and stable exhaust feedback
• 4-wire design for common OE-style signal and heater circuit layouts
• Round connector shape for listed vehicle applications
• 18 x 1.5 mm thread size for proper exhaust bung fitment
• 400.0 overall length for applications that require the specified lead length
• Includes oxygen sensor and instruction sheet
• Delphi ES20014 cross-references select OE and aftermarket numbers for the same application

Detailed Description

Delphi builds the ES20014 using OE heritage and application knowledge developed through long-term supplier experience with major automakers. This oxygen sensor is engineered for vehicles that require a heated, 4-wire sensor with a round connector and 18 x 1.5 mm thread. It is listed for multiple positions, including center, front, rear, and rear right, so the exact placement should be matched to the vehicle application tab before ordering.

Fitment coverage includes long-tail searches such as rear oxygen sensor for 2007-2010 Mazda CX-9, front oxygen sensor for 1995-1999 Ford Taurus, and rear oxygen sensor for 2006-2008 Mercury Mariner. The Delphi ES20014 also applies to select Mazda B2300, B3000, B4000, Ford Escape, and Jaguar S-Type listings with the 400 mm overall length requirement.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to oxygen sensor circuit faults
• Incorrect air-fuel ratio readings from a worn upstream or downstream sensor
• Slow sensor response caused by age, contamination, or heater circuit wear
• Emissions test failures tied to inaccurate exhaust oxygen feedback
• Rough idle, hesitation, or fuel trim issues linked to faulty sensor data

Installation Notes and Tips

Confirm the exact position on your vehicle before installation, since this part is listed for multiple locations. Verify connector style, thread size, and lead length against the original sensor, and inspect the exhaust bung threads before tightening. For best results, clear diagnostic trouble codes after installation and complete a drive cycle so the engine control module can relearn sensor data.

Quality Assurance

Delphi’s OE background is built into this aftermarket replacement, with engineering informed by decades of original-equipment supply experience. The ES20014 is designed to meet the fitment and electrical requirements called out in the application data for the listed Ford, Mazda, Mercury, and Jaguar vehicles.