Denso 234-4354 Oxygen Sensor - Downstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4354 Oxygen Sensor - Downstream

Brand Denso 234-4354
Position Downstream
Connector Gender Female
Mounting Type Threaded
Sensor Type Heated
Thread Diameter 0.708
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 20.08
Product line OE Style
Fits Acura · 2 vehicles

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

Heated sensor. Helps support efficient engine performance and fuel economy.

Threaded mounting. Female connector and 4-wire design for a direct install.

Cross-references ACDelco 213-3027, Bosch 15408 and Bosch 15948 for the same application. See all 12.

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Denso 234-4354 Oxygen Sensor for Acura RSX

Denso 234-4354 is an OE-style heated oxygen sensor built for precise replacement and first-time fit. It is engineered for the downstream position on 2005-2006 Acura RSX models, with the exact connector and threaded mounting needed for direct service replacement.

Key Features

  • Specific-fit heated oxygen sensor for downstream applications
  • OE-style design for direct replacement on 2005-2006 Acura RSX
  • 4-wire configuration with female connector
  • 20.08-inch wiring harness length for proper routing
  • Threaded mounting with 0.708-inch thread diameter
  • Built to Denso OE standards for accurate sensor response
  • Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

This Denso oxygen sensor is designed for drivers and technicians replacing a downstream sensor on the Acura RSX. The 234-4354 follows OE-style dimensions and electrical configuration, helping maintain proper exhaust feedback for engine management. Denso’s OE-style product line focuses on exact replacement fitment and consistent sensor performance, making it a practical choice when restoring emissions system operation on the 2005-2006 Acura RSX.

This part cross-references Bosch 15408 and NTK 24254 for the same application.

Common Issues It Can Help Address

  • Check engine light related to downstream oxygen sensor faults
  • Incorrect air-fuel feedback from a worn sensor
  • Reduced fuel economy caused by inaccurate exhaust readings
  • Emissions test failure tied to sensor performance
  • Rough or inconsistent engine operation from degraded sensor output

Installation Notes and Tips

Fits 2005-2006 Acura RSX, downstream. Confirm the connector style, wire count, and threaded mounting before installation. Use the existing harness routing to avoid strain on the lead, and verify the sensor location matches the downstream position specified for the vehicle.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and function. The design includes a protective aluminum oxide trap layer to help shield the sensing element from contamination and support long service life.

Related reading

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2006AcuraRSXDownstreamOE Style
2005AcuraRSXDownstreamOE Style
Directly replaces or cross-references 12 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-3027Bosch — 15408Bosch — 15948Delphi — ES20215Honda — 36532PNDA11Honda — 36532PNDA21Honda — 36532PRBA11NTK — 24254Standard Ignition — SG1748Standard Ignition — SG1757Walker Products — 250-24446Walker Products — 350-34230