NGK Oxygen Sensor

Fits Most Dodge/Jeep 8.0L/5.7L/5.2L/4.0L/3.9L (01-03)

23139

Overview:

The NGK Direct Fit Oxygen Sensor is engineered to meet or exceed OEM specifications, providing reliable and precise air-fuel ratio monitoring for a wide range of Dodge and Jeep vehicles from 1993 to 2010. As a critical component of the vehicle’s on-board diagnostic system, this sensor ensures optimal engine performance, improved fuel efficiency, and reduced emissions. Designed for direct replacement, it fits most Dodge Ram, Dodge Dakota, Jeep Grand Cherokee, and Jeep Wrangler models, making it an ideal choice for drivers seeking dependable sensor performance without compromise.

Trusted worldwide, NGK leverages its expertise as the largest OEM oxygen sensor supplier to deliver a product that supports accurate closed-loop feedback to the engine control unit (ECU), helping maintain proper combustion and alerting diagnostic systems to potential issues.

Key Features:

NGK’s oxygen sensor incorporates advanced technology and durable construction to provide long-lasting performance and resistance to common sensor failures. Key features include:

• Advanced ceramic sensor element with a 3-stage contaminant-resistant plasma jet and deposit trap overcoat to protect against element poisoning
• Direct fit design for easy installation with no modifications required
• Precision manufacturing ensures accurate air-fuel ratio readings for optimal engine management
• Compatible with OBDII systems to support onboard diagnostics and emissions control
• Robust construction to withstand harsh engine environments and temperature fluctuations
• OE application technology developed in partnership with original equipment manufacturers
• Improved sensor design for enhanced durability and reduced failure rates

Construction & Design:

At its core, NGK’s oxygen sensor features a high-quality ceramic sensing element, expertly controlled from raw material to finished product. The sensor’s advanced plasma jet and deposit trap overcoat protect the ceramic element from contamination and poisoning, which are common causes of sensor failure. This meticulous engineering ensures consistent sensor output and longevity, even under demanding operating conditions.

The sensor housing and wiring are built to OEM standards, providing a secure fit and reliable electrical connections. This attention to detail guarantees that the sensor maintains optimal performance throughout its service life.

Installation & Fitment:

This NGK oxygen sensor is designed as a direct replacement for a broad range of Dodge and Jeep models, including:

• Dodge Ram 1500, 2500, and 3500 (1994–2002)
• Dodge Dakota (1997–2004)
• Jeep Grand Cherokee (1993–1998, 1999–2004, 2005–2010)
• Jeep Wrangler (1997–2006)

Installation is straightforward and requires no special tools or modifications. The sensor fits into the existing oxygen sensor port, allowing for a seamless swap that restores proper sensor function and engine management.

What's Included:

• One NGK Direct Fit Oxygen Sensor (Part #23139)
• Pre-installed wiring harness connector for easy plug-and-play installation
• Installation instructions

Ideal For:

This oxygen sensor is ideal for vehicle owners and automotive technicians seeking a reliable, OEM-quality replacement part for Dodge Ram, Dodge Dakota, Jeep Grand Cherokee, and Jeep Wrangler models manufactured between 1993 and 2010. It is especially suited for those addressing check engine light issues related to oxygen sensor failure, improving fuel economy, or restoring emissions compliance.

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.