Denso 234-4021 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4021

Denso 234-4021 is an OE Style heated oxygen sensor built for specific-fit replacement on select Chrysler, Dodge, and Plymouth minivans. It is engineered for downstream applications and uses a threaded mounting design with a female connector for direct replacement on the listed vehicles.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for direct replacement on listed applications
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 12.01 in. wiring harness length
• OE Style construction for factory-style fit and function
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso’s OE Style line is built and tested to OE standards, with each sensor precision manufactured for exact replacement and first-time fit. The 234-4021 oxygen sensor is designed for downstream use on 1996-2000 Chrysler Town & Country, 2000 Chrysler Grand Voyager, 2000 Chrysler Voyager, 1996-2000 Dodge Caravan, 1996-2000 Dodge Grand Caravan, 1996-2000 Plymouth Grand Voyager, and 1996-2000 Plymouth Voyager. This part cross-references Bosch 13149 and NTK 23002 for the same application.

For buyers searching for a downstream oxygen sensor for 1996-2000 Dodge Caravan or a replacement oxygen sensor for Chrysler Town & Country, Denso 234-4021 provides the OE-style dimensions and connector layout needed for a direct service replacement. It is also listed for 1997-1999 Dodge Caravan, 1997-1999 Dodge Grand Caravan, 1997-1999 Plymouth Voyager, and 1997-1999 Plymouth Grand Voyager, plus 1999 Dodge Grand Caravan and 1999 Plymouth Grand Voyager.

What It Helps Address

• Check engine light caused by a failing downstream oxygen sensor
• Incorrect exhaust feedback to the engine control system
• Reduced fuel efficiency from inaccurate sensor readings
• Rougher engine operation related to aged sensor response
• Contamination-related sensor wear from silicone or lead exposure

Installation Notes

Verify the vehicle year, make, model, and downstream position before ordering. This is a specific-fit, threaded sensor with a female connector and 4-wire layout, so connector style and harness length should be matched to the original part. For best results, compare the original sensor location and connector routing on the vehicle before installation. Denso 234-4021 is commonly searched as an OE style oxygen sensor for Chrysler Grand Voyager, Dodge Grand Caravan, and Plymouth Voyager applications.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and performance. The OE Style design focuses on exact replacement dimensions, factory-style connection points, and durability features intended to support long service life in the listed applications.