Delphi ES20131 Oxygen Sensor - Rear

Delphi ES20131 Rear Oxygen Sensor

The Delphi ES20131 is a heated rear oxygen sensor built for specific Nissan applications, including 1998-2000 Nissan Frontier and 2000 Nissan Xterra models without California Emission System. It uses OE-based engineering from Delphi’s long history supplying original equipment to major automakers, helping maintain accurate exhaust feedback in the emissions system.

Key Features

• Heated oxygen sensor for faster operating temperature
• Rear position application
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size
• Overall length: 1265.0
• Includes oxygen sensor and instruction sheet
• Delphi part number ES20131

Detailed Description

Delphi ES20131 is an emission control oxygen sensor engineered for rear sensor placement on select Nissan Frontier and Nissan Xterra models. As a heated sensor, it helps the exhaust monitoring system reach operating temperature more quickly, supporting stable signal output once the engine is running. The square connector, 4-wire layout, and 18 x 1.5 mm thread size make this a direct-fit style replacement for the listed applications. This part cross-references Bosch 15769 and DENSO Auto Parts 234-4323 for the same application.

What It Helps Address

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust oxygen readings in the emissions system
• Rough or inconsistent fuel control caused by a failing sensor signal
• Emissions test failures tied to rear sensor faults
• Replacement needs on 1998-2000 Nissan Frontier and 2000 Nissan Xterra, rear

Installation Notes and Tips

Fits 1998-2000 Nissan Frontier, rear, without California Emission System. Fits 2000 Nissan Xterra, rear, without California Emission System. Confirm connector shape, wire count, thread size, and rear sensor location before installation. Use the vehicle’s service procedure for removal and installation, and verify the exhaust system is cool before beginning work.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and knowledge developed through more than 100 years of original equipment experience and supplier relationships with major automakers. That background is reflected in the design and application matching of the ES20131 oxygen sensor.