Denso 234-3094 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-3094

Denso 234-3094 is an OE-style heated oxygen sensor built for direct replacement on select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. It is designed for a specific fit, with a threaded mounting design and a 3-wire configuration for upstream locations.

Built to OE standards, this Denso oxygen sensor uses a precision-made ceramic element and an aluminum oxide trap layer to help protect against silicone and lead contamination. That helps support stable engine management, accurate air-fuel feedback, and consistent fuel control on vehicles such as the Chevrolet Astro, GMC Safari, and Chevrolet Corvette.

Key Features

• OE Style replacement oxygen sensor for direct-fit service
• Heated sensor design for faster operating response
• Specific fit application for proper connector and thread match
• 3-wire, male connector configuration
• Threaded mounting type with 0.708 in. thread diameter
• 12.99 in. wiring harness length
• Aluminum oxide trap layer helps protect the sensing element

Product Details

Denso 234-3094 is engineered for upstream emission control service on a wide range of GM vehicles, including 1992-1993 Chevrolet C1500, 1992-1993 GMC K1500, 1992-1993 Chevrolet S10, 1992-1993 GMC Sonoma, and 1990-1992 Chevrolet Corvette. It also fits select 1993 Buick Regal, 1993 Oldsmobile Cutlass Supreme, and 1993 Pontiac Grand Prix applications. This part cross-references Bosch 13077 and NTK 21003 for the same application.

Common Issues This Sensor Can Address

• Faulty oxygen sensor signal causing poor fuel control
• Check engine light related to upstream sensor performance
• Rough idle or hesitation from inaccurate exhaust feedback
• Reduced fuel economy from delayed or inconsistent sensor response
• Emissions test failure tied to a worn sensor

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and upstream location before installation. This part is a specific-fit sensor, so it should be matched to the exact vehicle application listed. For best results, inspect the harness routing and exhaust threads before installing the new sensor on Chevrolet C1500, GMC K1500, or Chevrolet Corvette applications.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for accurate replacement fit and dependable operation. The OE-style design is intended to deliver the correct part and fit for the listed applications, including Chevrolet Astro, GMC Safari, and Chevrolet S10 models.