NGK Oxygen Sensor

1994–2010 Dodge Ram / 1999–2004 Jeep Grand Cherokee

Part #: 23140

Overview

The NGK Direct Fit Oxygen Sensor is engineered to deliver precise air-fuel ratio monitoring for select Dodge Ram and Jeep Grand Cherokee models spanning from 1994 to 2010. This sensor plays a critical role in maintaining optimal engine performance, fuel efficiency, and emissions control by providing accurate closed-loop feedback to the vehicle’s engine control unit (ECU). Designed for direct replacement, it ensures seamless integration without the need for modifications, making it an ideal upgrade or replacement for maintaining your vehicle’s diagnostic system integrity.

Trusted by professionals and enthusiasts alike, this NGK oxygen sensor offers reliable operation and long-lasting durability, helping your engine run cleaner and more efficiently while reducing harmful emissions.

Key Features

Built with advanced technology and OEM-quality standards, this NGK oxygen sensor provides the following benefits:

• 3-stage contaminant-resistant ceramic element for enhanced sensor longevity
• Precise closed-loop feedback to maintain the ideal air-fuel ratio
• Improved durability and resistance to sensor failure under harsh conditions
• Direct fit design for easy installation with no modifications required
• Manufactured by NGK, the world’s largest and most trusted sensor producer
• Helps reduce harmful emissions for cleaner exhaust output
• Compatible with multiple model years of Dodge Ram and Jeep Grand Cherokee
• OEM-quality construction ensures consistent and reliable performance

Construction & Design

This oxygen sensor features a robust ceramic sensing element designed to resist contamination from fuel additives, oil, and other engine byproducts. The 3-stage ceramic element enhances durability and accuracy, ensuring consistent sensor readings over time. The sensor housing and wiring are engineered to withstand extreme temperatures and vibration common in engine environments, providing long service life and dependable operation.

NGK’s precision manufacturing processes guarantee that each sensor meets or exceeds OEM specifications, delivering a perfect fit and reliable function for your vehicle’s emissions and fuel management systems.

Installation & Fitment

The NGK Direct Fit Oxygen Sensor is designed for straightforward installation on 1994–2001 and 2002–2010 Dodge Ram trucks, as well as 1999–2004 Jeep Grand Cherokee models. It installs directly into the factory sensor port, requiring no special tools or modifications. This plug-and-play design minimizes downtime and ensures your vehicle’s engine control system receives accurate oxygen level data immediately after installation.

Proper installation helps maintain your vehicle’s fuel economy, reduces emissions, and prevents diagnostic trouble codes related to oxygen sensor failure.

What's Included

• One NGK Direct Fit Oxygen Sensor (Part #23140)
• Pre-attached wiring harness for direct connection
• Installation instructions

Ideal For

This oxygen sensor is ideal for Dodge Ram and Jeep Grand Cherokee owners seeking a reliable, OEM-quality replacement part to restore or maintain their vehicle’s engine efficiency and emissions compliance. It is well-suited for daily drivers, fleet vehicles, and enthusiasts who demand consistent performance and durability from their engine management components.

NGK is one of the most trusted names in ignition, supplying spark plugs, coils, and related ignition/sensor components used across both OEM and aftermarket applications. For performance enthusiasts, NGK’s plug technology and broad coverage make it a reliable baseline upgrade for consistent spark, cleaner burn, and dependable operation under heat and boost.