Denso 234-3123 Oxygen Sensor - Downstream

OE Style Oxygen Sensor

This Denso oxygen sensor is a specific-fit, heated replacement built to OE standards for accurate exhaust monitoring. It is engineered for downstream applications and uses a threaded mounting design for a direct replacement approach on supported Nissan and INFINITI vehicles.

Key Features

• Heated oxygen sensor with a specific-fit design
• OE Style line built for exact replacement and first-time fit
• Exclusive aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination
• 3-wire design with male connector and threaded mounting
• 18.90 wiring harness length for application-specific routing

Detailed Description

Denso 234-3123 is an OE Style oxygen sensor made to match the original part’s fit and function on downstream applications. It is designed for 1993-1995 Nissan Altima, 1995-1996 Nissan Maxima, 1995-1997 Nissan 200SX, 1995 Nissan Sentra, 1996 Nissan Altima, 1996 Nissan Maxima, 1996 Nissan Sentra, 1994-1996 INFINITI G20, and 1996 INFINITI I30, with notes for California and build-date-specific coverage where listed. This part cross-references Bosch 13783 and NTK 24024 for the same application.

The sensor uses Denso’s aluminum oxide trap layer to help shield the sensing element from contamination that can affect engine performance and fuel economy. As part number 234-3123, it is a threaded, heated sensor with a male connector and specific-fit construction for straightforward replacement on the listed Nissan and INFINITI applications.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn downstream sensor
• Reduced fuel efficiency caused by inaccurate exhaust feedback
• Slow or inconsistent sensor response from contamination or age
• Fitment issues when replacing the original OE-style sensor

Installation Notes and Tips

Verify the vehicle’s year, engine configuration, build date, and California emissions notes before ordering. This sensor is a threaded, specific-fit replacement, so confirm connector style, wire count, and downstream location match the original unit. Use the part number 234-3123 to confirm application details during installation planning.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for exact replacement fitment and consistent performance. The OE Style line is built to deliver the right part and the right fit for the listed applications.