Denso 234-3005 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-3005

Denso 234-3005 is an OE-style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for upstream applications on select Chevrolet, GMC, Jeep, and Oldsmobile vehicles, including Chevrolet Corvette, Chevrolet S10, and GMC Jimmy fitments.

The Denso OE Style line focuses on direct-fit replacement parts that match original sensor requirements. This oxygen sensor uses a threaded mounting design, a male connector, 3-wire configuration, and a 13.39-inch wiring harness length for the specified applications.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for listed vehicle applications
• 3-wire configuration with male connector
• Threaded mounting type with 0.708-inch thread diameter
• 13.39-inch wiring harness length
• OE-style replacement built to match original fit and function
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso 234-3005 is designed for drivers replacing a worn upstream oxygen sensor on vehicles such as 1993-1995 Chevrolet Corvette, 1994-1995 Chevrolet Blazer, 1994-1995 Chevrolet S10, 1994-1995 GMC Jimmy, and 1987-1990 Jeep Cherokee. It also covers additional Chevrolet, GMC, Oldsmobile, and Jeep applications listed in the fitment data. This part cross-references Bosch 12008 and NTK 21003 for the same application.

As an OE-style sensor, this unit is manufactured and tested to strict original-equipment standards. The sensor’s protective trap layer is intended to help maintain signal quality by reducing contamination-related wear, supporting stable engine management and fuel control in the specified vehicles.

Common Reasons to Replace

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel readings
• Reduced fuel economy from an aging upstream sensor
• Slow sensor response or contamination damage
• Failed emissions inspection tied to sensor output

Installation Notes

Verify the vehicle’s year, make, model, and upstream sensor location before ordering. This part is a specific-fit threaded sensor, so connector style, wire count, and harness length should match the original unit. For best results, inspect the exhaust bung threads and wiring routing during installation on Chevrolet Corvette, GMC Sonoma, and Jeep Wrangler applications.

Quality Assurance

Denso manufactures this oxygen sensor to OE standards and tests it for direct replacement use. The OE-style design is intended to deliver the correct fit and sensor performance for the listed applications, including Denso 234-3005 fitments across 1986-1995 vehicles.