Denso 234-3003 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-3003

Denso 234-3003 is an OE-style heated oxygen sensor built for specific-fit replacement on select Chrysler, Dodge, and Plymouth applications. It is engineered for direct replacement service on upstream positions and is designed to restore accurate exhaust feedback for engine management.

The Denso OE Style line focuses on exact replacement fitment and OE-level construction. This sensor uses a threaded mounting design, a male connector, three wires, and a 12.83-inch wiring harness length for applications that require a precise factory-style layout.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for direct replacement applications
• Threaded mounting type with 0.708-inch thread diameter
• 3-wire configuration with male connector
• 12.83-inch wiring harness length
• OE Style construction for factory-style fit and function
• Built to Denso OE standards for replacement accuracy

Detailed Description

This Denso oxygen sensor is part of the OE Style product line, which is focused on replacement parts that match original equipment dimensions and connection points. Denso builds and tests these sensors to OE standards, and the design includes an aluminum oxide trap layer that helps protect the ceramic element from silicone and lead contamination. That protection supports stable sensor operation, consistent engine feedback, and long service life in demanding exhaust environments. This part number, 234-3003, is a direct-fit option for vehicles such as the 1987-1988 Chrysler Daytona, 1987-1988 Dodge Caravan, and 1987-1988 Plymouth Voyager in upstream locations.

This part cross-references Bosch 13190 and NTK 23005 for the same application.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel mixture feedback from a worn upstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Rough idle or drivability issues tied to sensor response problems
• Slow sensor switching from contamination or age-related wear

Installation Notes and Tips

Verify the vehicle’s year, make, model, and upstream sensor position before ordering. Confirm connector style, wire count, thread diameter, and harness length against the original sensor to ensure proper routing and connection. For fitment examples, this part fits 1987-1988 Chrysler Daytona, upstream; fits 1987-1988 Dodge Caravan, upstream; and fits 1987-1988 Plymouth Voyager, upstream. Additional listed applications include 1987-1988 Chrysler LeBaron, New Yorker, and Town & Country, plus 1987-1988 Dodge Aries, Dakota, Shadow, and Grand Caravan.

Quality Assurance

Denso manufactures this sensor to strict OE standards and tests it for replacement accuracy and first-time fit. The OE-style design is intended to match factory requirements for the listed applications, including 1987-1988 Chrysler, Dodge, and Plymouth upstream sensor locations. Part number 234-3003 is built for direct replacement service where exact fit and reliable exhaust feedback are required.