Denso 234-4358 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4358

Denso 234-4358 is a heated, specific-fit oxygen sensor built for direct replacement in downstream applications. It is engineered for 2006-2011 Acura CSX, 2006-2011 Honda Civic, and 2007-2008 Honda Fit, with OE-style fitment for accurate sensor replacement and dependable exhaust monitoring.

The OE Style line focuses on exact replacement dimensions and first-time fit. This Denso oxygen sensor uses a threaded mounting design, a female connector, 4-wire configuration, and a 33.78-inch wiring harness length to match the original layout on the vehicle.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit design for direct replacement
• Threaded mounting type with 0.708-inch thread diameter
• 4-wire, female connector configuration
• 33.78-inch wiring harness length
• OE Style construction for accurate fit and function

OE Style Design Details

Denso’s OE Style product line is built around original-equipment replacement standards, with attention to sensor response, connector layout, and physical fit. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable operation over time. For drivers searching for a downstream oxygen sensor for 2006-2011 Honda Civic or a replacement oxygen sensor for 2007-2008 Honda Fit, Denso 234-4358 provides a direct-fit solution that matches the intended application.

This part cross-references Bosch 15027 and NTK 24026 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect air-fuel feedback from a worn exhaust sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response from contamination or age
• Failed emissions inspection tied to oxygen sensor faults

Installation Notes and Tips

Confirm the downstream position before installation and verify connector style, wire count, and thread size against the original sensor. Because this is a specific-fit threaded sensor, proper routing of the 33.78-inch harness is important to avoid strain or contact with hot exhaust components. Always compare the old unit to Denso 234-4358 before final installation on Acura CSX, Honda Civic, or Honda Fit applications.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement performance. The design is intended to deliver the correct fit and function for the listed downstream applications, with construction focused on durability and accurate exhaust sensing.