Delphi ES20328 Oxygen Sensor - Front, Front Left, Front Right or Rear

Delphi ES20328 Oxygen Sensor Overview

The Delphi ES20328 is a heated oxygen sensor built for precise exhaust monitoring on a wide range of Ford, Lincoln, Mazda, and Mercury applications. It uses a 4-wire design with a round connector and 18 x 1.5 mm thread size, making it a direct-fit replacement for many front and rear sensor locations.

Backed by Delphi’s OE heritage and decades of supplier experience, this oxygen sensor is engineered with production-level knowledge carried into the aftermarket. It is a strong match for drivers servicing Ford Ranger, Explorer, F-150, and related vehicles that require the correct 280 mm overall length.

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire configuration with round connector
• 18 x 1.5 mm thread size for common exhaust bung applications
• 280.0 overall length for listed vehicle positions
• Package includes oxygen sensor and instruction sheet
• Fits front, front left, front right, and rear positions depending on application

Fitment and Application Details

Compatible With 1999-2012 Ford, Lincoln, Mazda, and Mercury applications listed below, including long-tail searches such as Delphi ES20328 oxygen sensor for Ford Ranger front, Delphi ES20328 oxygen sensor for Ford F-150 rear, and Delphi ES20328 oxygen sensor for Mazda B3000 front. This part cross-references Bosch 13117 for the same application.

• Fits 2009-2012 Ford E-350 Super Duty, front right, with 280mm overall length
• Fits 2001-2011 Ford Ranger, front, with 280mm overall length
• Fits 2002-2010 Ford Explorer, front, with 280mm overall length
• Fits 2007-2010 Ford Explorer Sport Trac, front, with 280mm overall length
• Fits 2002-2010 Mercury Mountaineer, front, with 280mm overall length
• Fits 2001-2009 Mazda B2300, front, with 280mm overall length
• Fits 2004-2008 Ford F-150, rear, with 280mm overall length
• Fits 2001-2008 Ford F-150, front, with 280mm overall length
• Fits 2006-2008 Lincoln Mark LT, rear, with 280mm overall length
• Fits 2006-2008 Lincoln Mark LT, front, with 280mm overall length
• Fits 2004-2007 Ford Freestar, front, with 280mm overall length
• Fits 1999-2007 Mazda B3000, front, with 280mm overall length
• Fits 2005-2006 Ford Expedition, front, with 280mm overall length
• Fits 2001-2002 Ford Expedition, front, with 280mm overall length
• Fits 2006 Ford Ranger, front, with 280mm overall length; to 05/01/2006
• Fits 2005-2006 Lincoln Navigator, front, with 280mm overall length
• Fits 2001 Lincoln Navigator, front, with 280mm overall length
• Fits 2004-2005 Ford Explorer Sport Trac, rear, with 280mm overall length
• Fits 2004 Ford F-150 Heritage, front, with 280mm overall length
• Fits 1999-2003 Ford Windstar, front, with 280mm overall length
• Fits 2001-2003 Mazda B4000, front, with 280mm overall length
• Fits 1999-2001 Ford Explorer, front left, with 280mm overall length
• Fits 2000-2001 Ford F-150, front, with 280mm overall length; optional
• Fits 1999-2001 Mercury Mountaineer, front left, with 280mm overall length

What This 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, hesitation, or reduced drivability caused by faulty exhaust feedback
• Failed emissions testing tied to sensor response issues
• Slow sensor warm-up on heated oxygen sensor circuits

Installation Notes and Tips

Verify the required position before ordering, since this Delphi ES20328 is used in front, front left, front right, and rear locations depending on the vehicle. Confirm the 280 mm overall length, 4-wire connector layout, and 18 x 1.5 mm thread size against the original sensor before installation.

For best results, inspect the harness routing and connector condition before replacement, and follow the vehicle-specific application tab for the exact position. The included instruction sheet provides basic installation guidance.

Quality Assurance

Delphi builds aftermarket parts using OE experience gained from supplying major automakers, and that production knowledge is reflected in the ES20328 oxygen sensor design. The result is a replacement sensor developed with OE-style fitment and application-specific detail in mind.