Denso 234-4189 Oxygen Sensor - Downstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4189 Oxygen Sensor - Downstream

Brand Denso 234-4189
Position Downstream
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 37.80
Product line OE Style
Fits Toyota · 5 vehicles

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

Heated sensor. Delivers faster operation for dependable emissions control.

Exclusive aluminum oxide trap layer helps protect the ceramic element.

Cross-references ACDelco 213-1440, ACDelco 213-3032 and BorgWarner OS1536 for the same application. See all 36.

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OE-Style Oxygen Sensor for Tacoma

This Denso OE Style oxygen sensor is built for direct replacement on select Toyota Tacoma applications. It uses a heated, 4-wire design with a 37.80-inch wiring harness for a specific-fit installation and accurate exhaust monitoring.

Designed for 2000-2004 Toyota Tacoma downstream applications, Denso part number 234-4189 is engineered to match OE fit and function. It is a practical choice for drivers looking for a replacement oxygen sensor for a Toyota Tacoma downstream sensor location.

Key Features

  • Heated oxygen sensor for faster operating response
  • Specific-fit design for direct replacement
  • 4-wire configuration
  • 37.80-inch wiring harness length
  • OE Style construction for factory-style fitment
  • Denso part number 234-4189

OE Style Construction

Denso’s OE Style line is built to match original equipment requirements for fit and function. This oxygen sensor is precision-built for exact replacement, helping simplify installation on the correct Toyota Tacoma downstream application. Denso also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent sensor performance and long service life.

This part cross-references Bosch 13618 and NTK 24559 for the same application.

What It Helps Address

  • Check engine light related to downstream oxygen sensor faults
  • Incorrect exhaust oxygen readings
  • Reduced fuel economy caused by a worn sensor
  • Rough engine performance tied to sensor degradation
  • Slow sensor response after extended service life

Installation Notes

Fits 2001-2004 Toyota Tacoma, downstream. Fits 2000 Toyota Tacoma, downstream. Confirm the connector style, wire count, and sensor location before installation. Use the existing vehicle routing and mounting points to match the original sensor layout.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and dependable operation. Part number 234-4189 is built as a direct-fit OE Style sensor for the listed Toyota Tacoma applications.

Related reading

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2004ToyotaTacomaDownstreamOE Style
2003ToyotaTacomaDownstreamOE Style
2002ToyotaTacomaDownstreamOE Style
2001ToyotaTacomaDownstreamOE Style
2000ToyotaTacomaDownstreamCalifornia exempt parts can be used on pollution controlled vehicles in California.; OE Style
Directly replaces or cross-references 36 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-1440ACDelco — 213-3032BorgWarner — OS1536BorgWarner — OS1538BorgWarner — OS1542BorgWarner — OS1543BorgWarner — OS1586BorgWarner — OS1596BorgWarner — OS1598BorgWarner — OS1600Bosch — 13618Bosch — 13986Bosch — 13989Bosch — 15210Bosch — 15211Bosch — 15414Bosch — 15415Bosch — 15416Delphi — ES20192Delphi — ES20193NTK — 24559NTK — 24568Standard Ignition — SG788Toyota — 8946509250Toyota — 8946509260Toyota — 8946509270Toyota — 8946509280Toyota — 8946509330Toyota — 8946509340Toyota — 8946509350Toyota — 8946509360Toyota — 8946509370Walker Products — 250-24159Walker Products — 250-24278Walker Products — 350-34008Walker Products — 350-34443