Denso 234-3074 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-3074

Denso 234-3074 is an OE Style heated oxygen sensor built for specific-fit replacement in select Honda, Isuzu, Chevrolet, and Pontiac applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on the listed upstream positions.

Key Features

• Heated oxygen sensor with specific fitment for direct replacement
• 3-wire design with male connector and 12.80-inch wiring harness length
• Threaded mounting type with 0.708-inch thread diameter
• OE Style construction for the listed upstream applications
• Built to Denso’s OE-level manufacturing and testing standards
• Uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Product Details

This Denso oxygen sensor is designed to deliver the correct signal to the engine control system so fuel delivery and emissions control can stay within expected operating range. The OE Style design supports direct replacement on vehicles such as the 1994-1995 Honda Passport, 1994-1995 Isuzu Pickup and Rodeo, 1993-1994 Isuzu Amigo, and select 1985 Chevrolet Caprice, El Camino, Impala, Monte Carlo, and Pontiac Parisienne upstream locations. The part number 234-3074 is also referenced in cross-application listings for the same type of repair.

Denso’s OE Style line focuses on exact replacement dimensions and sensor performance, making this part a practical choice when replacing a worn upstream oxygen sensor on a Honda Passport or Isuzu Rodeo. This part cross-references Bosch (e.g., 13010, 15701) for the same application.

Common Problems This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel control from a failing upstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Slow sensor response that affects engine management
• Emissions test failure tied to a degraded oxygen sensor

Installation Notes

Verify the connector style, wire count, thread diameter, and upstream location before installation. This is a specific-fit, threaded sensor, so matching the vehicle application and exhaust position is important for proper installation. Confirm the listed year, make, and model before ordering Denso 234-3074.

Quality Assurance

Denso manufactures and tests this sensor to OE standards for consistent fit and performance. The sensor’s protective trap layer is designed to help resist contamination that can shorten service life and affect engine operation.