Denso 234-4955 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Honda Insight

Denso 234-4955 is an OE Style heated oxygen sensor built for direct replacement on the downstream position of 2002-2006 Honda Insight models. It is engineered for a specific fit and uses a 4-wire female connector with a threaded mounting design for a precise match to the original application.

Key Features

• OE Style replacement for the downstream oxygen sensor location
• Heated sensor design for faster operating response
• Specific fit for 2002-2006 Honda Insight, downstream
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 10.24 in. wiring harness length

OE Style Design and Construction

Denso’s OE Style line is built to match original equipment dimensions and electrical requirements for a first-time fit. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management performance and fuel efficiency over time. If you are replacing a worn downstream sensor on a Honda Insight, Denso 234-4955 provides the correct form, connector style, and mounting layout for the application.

This part cross-references Honda 36532PHMA21 and NTK 24429 for the same application.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor performance
• Slow or inaccurate exhaust oxygen readings
• Fuel trim issues caused by a degraded sensor signal
• Emissions test failures tied to sensor response problems
• Reduced fuel efficiency from an aging oxygen sensor

Installation Notes and Tips

Fits 2002-2006 Honda Insight, downstream, located after the primary catalyst. Confirm connector style, wire count, and threaded mounting before installation. Use the vehicle’s original routing path for the harness and verify the sensor is installed in the correct downstream position to avoid diagnostic faults. Denso 234-4955 is a specific-fit replacement, so it should match the OE-style application without modification.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for dimensional accuracy and consistent performance. The OE Style design is intended to deliver the correct part and fit for the listed Honda Insight applications.