Denso 234-4850 Oxygen Sensor - Downstream or Downstream Right

OE-Style Oxygen Sensor for Volkswagen Applications

The Denso 234-4850 is a specific-fit heated oxygen sensor built to OE-style standards for direct replacement in select Volkswagen applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on covered vehicles such as the Volkswagen Beetle, Jetta, and Touareg.

Denso’s OE Style line focuses on exact replacement fitment and sensor performance. This oxygen sensor uses a precision-built design with a threaded mounting style, 4-wire configuration, male connector, and 20.08-inch wiring harness length for the specified downstream locations.

Key Features

• Part number: 234-4850
• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit design for direct replacement
• 4-wire, male connector configuration
• Threaded mounting type with 0.708-inch thread diameter
• 20.08-inch wiring harness length
• OE-style construction for accurate replacement fitment
• Built with Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Product Details

The Denso 234-4850 oxygen sensor is designed for vehicles that require a downstream heated sensor with OE-style dimensions and connector layout. It is a direct replacement for select Volkswagen models, including the 2004-2006 Volkswagen Touareg, downstream right; 2004-2005 Volkswagen Jetta, downstream; and 2006-2010 Volkswagen Beetle, downstream. This part number also appears in cross-reference listings for ACDelco 213-3044 and Bosch 16034 for the same application.

As part of Denso’s OE Style product line, this sensor is manufactured and tested to strict original-equipment standards. The design supports accurate exhaust gas monitoring and consistent signal delivery, which is important for vehicles using downstream sensor feedback in catalyst monitoring.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect air-fuel feedback from a worn or contaminated sensor
• Emissions test failures tied to oxygen sensor performance
• Reduced fuel economy caused by inaccurate exhaust readings
• Driveability issues linked to poor sensor response

Installation Notes and Fitment

• Fits 2006-2010 Volkswagen Beetle, downstream, loc. in catalyst; OE style
• Fits 2004-2006 Volkswagen Touareg, downstream right; OE style
• Fits 2005 Volkswagen Beetle, downstream, w/ 20" downstream sensor; OE style
• Fits 2004-2005 Volkswagen Jetta, downstream, loc. in catalyst; OE style
• Confirm connector style, wire length, and threaded mounting before installation
• Use the vehicle’s original sensor location and routing to maintain proper harness clearance

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests it for replacement accuracy and fit. The aluminum oxide trap layer is included in the sensor design to help protect the sensing element from contamination, supporting long-term performance in demanding exhaust environments.