Delphi ES10497 Oxygen Sensor

Delphi ES10497 Oxygen Sensor Overview

The Delphi ES10497 is a heated upstream oxygen sensor built for precise exhaust monitoring and reliable engine management feedback. It is a direct-fit style replacement for select Nissan Maxima, Nissan Quest, and Mercury Villager applications, with OE-based engineering informed by Delphi’s long history supplying original equipment to major automakers.

Compatible With 1990-1994 Nissan Maxima, 1993-1994 Nissan Quest, and 1993 Mercury Villager, this oxygen sensor supports accurate air-fuel control in the upstream location. The Delphi ES10497 is a practical choice when replacing a worn sensor that can affect drivability and emissions performance.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Upstream position for pre-catalyst exhaust monitoring
• 3-wire design for the listed vehicle applications
• Flat connector shape for OE-style electrical connection
• 12 x 1.25 mm thread size for proper exhaust bung fitment
• Overall length: 810.0
• Includes oxygen sensor and instruction sheet

Detailed Description

Delphi ES10497 is engineered for upstream exhaust sensing on select Nissan Maxima, Nissan Quest, and Mercury Villager models. As a heated oxygen sensor, it reaches operating temperature more quickly than an unheated design, helping the engine control system read exhaust oxygen content sooner after startup. Delphi’s OE background is reflected in the sensor’s construction and application-specific fitment, making it a strong replacement option for vehicles that rely on accurate upstream feedback for fuel trim control.

This part cross-references Bosch (e.g., 13387, 13591) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate air-fuel mixture feedback
• Reduced fuel economy from a failing upstream sensor
• Emissions test failures tied to sensor response issues
• Slow sensor warm-up after cold starts

Installation Notes and Tips

Verify the upstream sensor location before installation and confirm the 12 x 1.25 mm thread size matches the exhaust bung. Inspect the connector style and wire routing against the original sensor to ensure proper fit on the Nissan Maxima, Nissan Quest, or Mercury Villager application. Follow the included instruction sheet and clear any stored diagnostic trouble codes after installation if required by the vehicle.

Quality Assurance

Delphi builds this replacement sensor using OE experience and application knowledge developed through decades of supplying original equipment to major automakers. That OE heritage supports consistent fitment and dependable signal performance for the listed vehicles.