Delphi ES20132 Oxygen Sensor - Rear

Rear Heated Oxygen Sensor for Nissan and Mercury

The Delphi ES20132 is a rear heated oxygen sensor built for specific Nissan Quest and Mercury Villager applications. It uses OE-based engineering from Delphi’s long history supplying original equipment to major automakers, with the fit and signal characteristics needed for emissions monitoring.

• Heated oxygen sensor for rear position applications
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size
• Overall length: 830.0
• Package contents: oxygen sensor and instruction sheet
• Fits 1998 Nissan Quest, rear
• Fits 1999-2000 Nissan Quest, rear, without California Emission System
• Fits 1999-2000 Mercury Villager, rear, without California Emission System

OE-Based Design and Fitment

Delphi ES20132 is an oxygen sensor for the rear exhaust location on 1998 Nissan Quest, 1999-2000 Nissan Quest without California Emission System, and 1999-2000 Mercury Villager without California Emission System. The heated sensor design helps the engine control system monitor exhaust oxygen content after the catalytic converter, supporting accurate emissions feedback on the listed vehicles. This part cross-references DENSO Auto Parts (e.g., 234-4701, 234-4779) for the same application.

Common Issues This Sensor Can Address

• Check engine light related to rear oxygen sensor performance
• Fault codes tied to slow sensor response or heater circuit faults
• Incorrect exhaust feedback affecting emissions monitoring
• Failed inspection results caused by a worn rear O2 sensor
• Driveability concerns linked to inaccurate exhaust oxygen readings

Installation Notes and Tips

Verify rear sensor placement before installation and confirm the vehicle is not equipped with California Emission System when required by fitment. Match the 4-wire square connector and 18 x 1.5 mm thread size to the original sensor configuration. Inspect the exhaust bung and wiring routing before tightening the sensor to the specified location.

Quality Assurance

Delphi builds this replacement sensor with OE heritage and knowledge drawn from more than a century of original equipment experience. That background supports consistent construction and application-specific fitment for the listed Nissan Quest and Mercury Villager vehicles.