Denso 234-4734 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4734

Denso 234-4734 is a specific-fit heated oxygen sensor built to OE-style dimensions for direct replacement on select Volvo applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on the listed vehicles.

Compatible with 2005-2010 Volvo S40 upstream center locations and 2005-2010 Volvo V50 upstream center locations, this sensor also covers 1999-2000 Volvo S70 and 1999-2000 Volvo V70 downstream positions. This part cross-references Bosch 13516 for the same application.

Key Features

• Heated oxygen sensor with a 4-wire design
• Specific-fit OE Style replacement for direct installation
• Threaded mounting type with 0.708 in. thread diameter
• 25.59 in. wiring harness length for vehicle-specific routing
• Male connector for factory-style electrical connection
• Denso aluminum oxide trap layer helps protect the sensing element from silicone and lead contamination

Product Details

Denso OE Style oxygen sensors are manufactured and tested to OE standards, with precision-built dimensions that match the original part location and connector layout. The Denso 234-4734 is designed for accurate exhaust oxygen monitoring, which supports proper fuel control and emissions system operation on Volvo S40, Volvo V50, Volvo S70, and Volvo V70 applications listed below. The OE-style construction helps reduce fitment issues during replacement and supports consistent sensor response over time.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel control from a failing sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Emissions test failure tied to sensor degradation
• Slow sensor response or contamination-related signal problems

Installation Notes

• Verify upstream or downstream position before ordering; fitment varies by vehicle and location.
• Confirm the threaded mounting and connector style match the original sensor.
• Inspect the harness routing and connector condition before installation.
• Use the vehicle’s exact year, model, and position to confirm compatibility with Denso 234-4734.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each design for replacement accuracy and fit. The sensor’s contamination-resistant trap layer is part of Denso’s OE-focused engineering approach for dependable performance in emissions control service.