Delphi ES20221 Oxygen Sensor - Front Left, Front Right or Rear

OE-Style Oxygen Sensor for Select Hyundai and Kia

Delphi ES20221 is a heated oxygen sensor built for select Hyundai and Kia applications that require precise exhaust feedback. With OE heritage behind the design, this sensor supports accurate air-fuel monitoring for front and rear positions where specified.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design with a square connector shape
• 18 x 1.5 mm thread size for the listed applications
• Overall length: 440.0
• Package contents: oxygen sensor and instruction sheet
• Position coverage includes front left, front right, and rear, depending on vehicle application

Detailed Description

The Delphi ES20221 oxygen sensor is engineered for emissions control systems that rely on accurate exhaust oxygen readings. Delphi draws on more than 100 years of OE experience and supplier knowledge used by major automakers, and that background is reflected in the sensor design and fitment accuracy. This part number, ES20221, is listed for 2002-2006 Hyundai and Kia models including Hyundai Santa Fe, Hyundai XG350, Kia Amanti, Kia Sedona, and Kia Sorento in the positions shown in the fitment data.

This part cross-references DENSO Auto Parts 234-4194 and NTK 25158 for the same application.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream or downstream sensor
• Reduced emissions system efficiency
• Rough idle or drivability issues tied to faulty exhaust feedback
• Slow sensor response after warm-up

Installation Notes and Tips

Verify the exact position before ordering, since this sensor is listed for front left, front right, and rear locations depending on the vehicle. Confirm thread size, connector shape, wire count, and overall length against the original sensor before installation. For the listed applications, this ES20221 oxygen sensor fits 2003-2006 Hyundai Santa Fe, front right; 2003-2006 Hyundai Santa Fe, front left; 2004-2006 Kia Amanti, front right; 2004-2006 Kia Amanti, front left; 2003-2006 Kia Sorento, rear; 2002-2005 Hyundai XG350, front right; 2002-2005 Hyundai XG350, front left; 2002-2005 Kia Sedona, front right; and 2002-2005 Kia Sedona, front left.

Quality Assurance

Delphi builds this oxygen sensor using OE-based engineering knowledge developed through long-term supplier experience with major automakers. That OE background supports consistent fitment and sensor construction for the specified Hyundai and Kia applications.