Denso 234-4229 Oxygen Sensor - Downstream Front

Denso OE Style Oxygen Sensor for Jeep TJ and Wrangler

The Denso 234-4229 is an OE Style heated oxygen sensor built for direct replacement in select Jeep applications. It is engineered for the downstream front position on 2001-2003 Jeep TJ and 2001-2003 Jeep Wrangler models, with a specific-fit design for accurate installation and dependable signal performance.

Key Features

• OE Style replacement oxygen sensor from Denso
• Heated sensor design with 4-wire configuration
• Specific fit for the downstream front position
• Threaded mounting type with female connector
• Wiring harness length: 9.65
• Thread diameter: 0.708
• Built to OE standards for exact replacement fit
• Uses Denso’s aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination

Product Details

Denso 234-4229 is designed for drivers who need a direct-fit oxygen sensor replacement for Jeep TJ and Jeep Wrangler models from 2001 through 2003. As part of Denso’s OE Style line, this sensor follows factory-style dimensions and connector layout to support a first-time fit in the downstream front location. The heated design helps the sensor reach operating temperature efficiently, while the specific-fit construction simplifies matching the original equipment setup. This part cross-references Bosch 13718 and NTK 23142 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Reduced fuel economy caused by slow or inaccurate sensor response
• Rough engine operation tied to faulty exhaust feedback
• Replacement needs for a damaged or contaminated downstream front sensor

Installation Notes and Tips

Fits 2001-2003 Jeep TJ, downstream front. Fits 2001-2003 Jeep Wrangler, downstream front. Confirm the connector style, threaded mounting point, and harness length before installation. Because this is a specific-fit sensor, compare the original sensor location and wiring layout to the replacement part number 234-4229 before installation. Use proper exhaust sensor removal practices to avoid damaging the threads or connector.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and function. The OE Style line is built as a direct replacement solution, with attention to exact dimensions and contamination resistance for long-term service.