Denso 234-4503 Oxygen Sensor - Downstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4503 Oxygen Sensor - Downstream

Brand Denso 234-4503
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 25.98
Product line OE Style
Fits Toyota · 3 vehicles

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

Heated sensor. Helps maintain accurate emissions control and engine performance.

Threaded mounting. Female connector and 4-wire design for a specific fit.

Cross-references ACDelco 213-3874, BorgWarner OS2308 and Bosch 15620 for the same application. See all 9.

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Denso OE Style Oxygen Sensor for Toyota RAV4

The Denso 234-4503 is a heated, specific-fit oxygen sensor built for direct replacement in select Toyota RAV4 applications. It is engineered for the downstream position and uses a 4-wire, female connector design with a threaded mount for a precise OE-style fit.

Key Features

  • OE Style replacement oxygen sensor from Denso
  • Specific fit for direct installation on listed Toyota RAV4 applications
  • Heated sensor design for faster operating response
  • 4-wire configuration with female connector
  • Threaded mounting type with 0.708 in. thread diameter
  • Wiring harness length: 25.98 in.

Product Details

Denso 234-4503 is manufactured and tested to OE standards for accurate replacement performance. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and consistent emissions feedback. This OE-style design is a direct replacement choice for 2003 Toyota RAV4 downstream oxygen sensor service and 2004-2005 Toyota RAV4 downstream oxygen sensor replacement.

This part cross-references Bosch 15620 and NTK 24236 for the same application.

Common Issues This Sensor Can Address

  • Check engine light related to oxygen sensor performance
  • Incorrect air-fuel ratio feedback from a worn downstream sensor
  • Reduced fuel economy caused by inaccurate exhaust monitoring
  • Emissions test failures tied to sensor response issues
  • Rougher engine operation from degraded exhaust sensor output

Installation Notes

Fits 2003 Toyota RAV4, downstream. Fits 2004-2005 Toyota RAV4, downstream. Confirm connector style, thread size, and sensor position before installation. Use proper oxygen sensor service tools and inspect the harness routing to avoid strain on the lead wire during installation.

Quality Assurance

Denso builds this OE Style oxygen sensor to strict original-equipment standards for fit and function. The precision-built design supports first-time fitment on the listed Toyota RAV4 applications and is backed by Denso’s OE-focused manufacturing approach.

Related reading

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2005ToyotaRAV4DownstreamOE Style
2004ToyotaRAV4DownstreamOE Style
2003ToyotaRAV4DownstreamO.E. Quality Direct Fit Replacement Sensor; Oxygen Sensor - OE Style
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-3874BorgWarner — OS2308Bosch — 15620Delphi — ES20180NTK — 24236Standard Ignition — SG1475Toyota — 8946542130Walker Products — 250-24838Walker Products — 350-34315