Delphi ES20172 Oxygen Sensor - Front, Rear, Rear Left or Rear Right

Delphi Heated Oxygen Sensor ES20172

Delphi ES20172 is a heated oxygen sensor built for precise exhaust feedback in select Nissan, INFINITI, and Suzuki applications. It uses OE-based engineering from a supplier with decades of original-equipment experience, helping maintain accurate air-fuel control and emissions monitoring.

• Heated oxygen sensor for faster operating temperature and stable signal output
• 4-wire design with square connector shape
• Thread size: 18 x 1.5 mm
• Overall length: 470.0
• Package contents: oxygen sensor and instruction sheet
• Position-specific coverage for front, rear, rear left, and rear right applications

OE-Based Design and Fitment

This Delphi oxygen sensor is engineered for direct replacement use in emissions control systems where accurate exhaust readings are critical. It fits 2003-2006 Nissan Sentra, rear; 2004-2015 Nissan TITAN, rear left and rear right; 2004-2010 INFINITI QX56, rear left and rear right; 2005-2019 Nissan Frontier, rear; 2005-2012 Nissan Pathfinder, rear left; 2005-2012 Nissan Xterra, rear left; 2005-2015 Nissan Armada, rear left and rear right; 2008-2012 Nissan Pathfinder, rear right; 2009-2012 Suzuki Equator, rear and rear right; and 2012-2021 Nissan NV1500, NV2500, and NV3500, rear left. It also fits 2004 Nissan Pathfinder Armada, rear left and rear right, and 2003 Nissan Sentra, front, without California Emission System; to 04/2003. Delphi ES20172 is a practical OE-style replacement for Nissan Frontier and Nissan TITAN exhaust sensor service.

This part cross-references Bosch 16511 and DENSO Auto Parts 234-4297 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel control accuracy from a worn sensor
• Emissions system fault codes tied to rear or front sensor output
• Slow sensor response after extended service life

Installation Notes and Tips

Confirm the exact position on your vehicle before ordering, since this part is listed for front, rear, rear left, and rear right locations depending on application. Match the 4-wire square connector and 18 x 1.5 mm thread size to the original sensor, and verify the overall length during replacement. Use the application tab or vehicle service information to confirm the correct side and emissions configuration, especially on the 2003 Nissan Sentra front application without California Emission System.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and knowledge developed through long-term original-equipment supply to major automakers. That background is reflected in the design and application coverage of ES20172.