Denso 234-9066 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-9066 Air / Fuel Ratio Sensor - Upstream

Brand Denso 234-9066
Position Upstream
Connector Gender Female
Grade Type Regular
Sensor Type Heated
Thread Diameter 0.711
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 23.62
Product line OE Style
Fits Acura · 5 vehicles

OE style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Helps the sensor reach operating temperature quickly.

4-wire design. Uses a female connector for a straightforward connection.

Cross-references ACDelco 213-2856, BorgWarner OS2203 and Bosch 15482 for the same application. See all 9.

$249.74Free shipping
In stock · usually ships same day before 1pm CST
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Order total $249.74
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air / Fuel Ratio Sensor options

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9066 is an OE Style heated air/fuel ratio sensor built for direct replacement on select Acura TSX applications. It is engineered for specific fitment and precise signal control, making it a strong choice for 2004-2008 Acura TSX upstream sensor service.

Key Features

  • OE Style replacement from Denso for direct-fit service
  • Heated sensor design for faster operating temperature
  • Specific fit application for select Acura TSX models
  • 4-wire configuration with female connector
  • 23.62 in. wiring harness length for proper routing
  • 0.711 thread diameter for the listed application

Product Details

Denso 234-9066 air/fuel ratio sensor is manufactured and tested to OE standards for accurate replacement performance and first-time fit. This sensor is intended for the upstream position on 2004-2008 Acura TSX models and is built as a direct replacement for the original equipment part. The OE Style line focuses on exact replacement dimensions and connector design, helping maintain proper sensor response in the exhaust stream. This part cross-references Bosch 15482 for the same application.

Common Issues This Sensor May Address

  • Check engine light related to air/fuel ratio sensor performance
  • Rough idle caused by inaccurate upstream sensor readings
  • Fuel trim concerns from a slow or failing heated sensor
  • Emissions test failure tied to sensor response issues
  • Reduced drivability from incorrect air/fuel mixture feedback

Installation Notes

Verify the vehicle is a 2004-2008 Acura TSX with the upstream sensor location before ordering. Match the connector style, wire count, and thread diameter to the original sensor, and inspect the harness routing before installation. For best results, confirm the exhaust threads are clean and the sensor is installed to the correct position specified for the vehicle.

Quality Assurance

Denso manufactures this sensor to strict OE standards and tests each component for replacement accuracy and fit. The OE Style product line is focused on direct replacement parts that match original equipment requirements for the listed Acura TSX applications.

Related reading

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2008AcuraTSXUpstreamOE Style
2007AcuraTSXUpstreamOE Style
2006AcuraTSXUpstreamOE Style
2005AcuraTSXUpstreamOE Style
2004AcuraTSXUpstreamOE Style
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-2856BorgWarner — OS2203Bosch — 15482Delphi — ES10940Honda — 36531RBB003NTK — 24668Standard Ignition — SG1370Walker Products — 250-54022Walker Products — 350-64001