Denso 234-4100 Oxygen Sensor - Upstream Front or Upstream Rear

Denso OE Style Oxygen Sensor for Acura NSX

Denso 234-4100 is an OE Style heated oxygen sensor built for precise replacement and consistent exhaust feedback. It is a specific-fit sensor for 1997-1999 Acura NSX applications, including upstream front and upstream rear positions.

Key Features

• Heated oxygen sensor with a specific-fit design for direct replacement
• 34.65-inch wiring harness length for application-specific routing
• 4-wire configuration with male connector and threaded mounting
• 0.708-inch thread diameter for the listed fitment
• OE Style construction focused on first-time fit and accurate sensor response
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

OE Style Design and Fitment

The Denso OE Style line is built to match original equipment requirements for fit and function. For Acura NSX owners, part number 234-4100 is listed for 1997-1999 Acura NSX upstream front and 1997-1999 Acura NSX upstream rear positions. This makes it a direct replacement choice when servicing the oxygen sensor on a 1997-1999 Acura NSX.

Denso manufactures and tests these sensors to OE standards, with precision-built components intended to match the original sensor location and connector style. The protective trap layer is designed to help preserve the sensing element, supporting stable engine management and long service life.

This part cross-references Bosch 15478 and NTK 24586 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn sensor
• Reduced fuel economy caused by slow or inaccurate exhaust feedback
• Rough idle or drivability concerns tied to sensor degradation
• Failed emissions testing due to a faulty upstream oxygen sensor

Installation Notes and Tips

Confirm the sensor position before installation, since this part is listed for both upstream front and upstream rear locations on the Acura NSX. Verify connector style, thread diameter, and harness routing against the original sensor before tightening the threaded mount. For best results, inspect the exhaust bung and wiring path for damage or contamination before installing the new sensor.

Quality Assurance

Denso builds this oxygen sensor to strict OE standards and tests it for exact replacement fitment. The OE Style design, specific application coverage, and contamination-resistant sensing element support dependable performance on 1997-1999 Acura NSX models.