Denso 234-4235 Oxygen Sensor - Downstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4235 Oxygen Sensor - Downstream

Brand Denso 234-4235
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 36.61
Product line OE Style
Fits Saturn · 4 vehicles

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

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

Threaded mounting. Specific-fit design with a female connector and 4-wire harness.

Cross-references ACDelco 213-2976, Bosch 15044 and Delphi ES20366 for the same application. See all 8.

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Denso OE Style Oxygen Sensor 234-4235

Denso 234-4235 is a specific-fit heated oxygen sensor built for OE-style replacement on select Saturn applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on downstream locations.

Key Features

  • Heated oxygen sensor for faster operating readiness
  • Specific-fit design for direct replacement on listed applications
  • 4-wire configuration with female connector
  • Threaded mounting with 0.708 in. thread diameter
  • 36.61 in. wiring harness length for proper routing
  • OE Style construction for factory-like fit and function

OE Style Construction

Denso’s OE Style line focuses on direct replacement parts that match original equipment fit and performance expectations. The 234-4235 oxygen sensor uses precision-built components and an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent sensor response and long service life. This part cross-references Bosch 15044 and NTK 21041 for the same application.

Fitment

  • Fits 2004-2005 Saturn Vue, downstream.
  • Fits 2003-2004 Saturn Ion, downstream.

What This Sensor Helps Address

  • Check engine light concerns related to downstream oxygen sensor faults
  • Incorrect exhaust oxygen readings affecting fuel control
  • Rough idle or drivability issues tied to sensor signal degradation
  • Reduced fuel economy caused by inaccurate exhaust feedback
  • Emissions test failures linked to a worn or slow-responding sensor

Installation Notes

Verify downstream sensor location, connector style, thread size, and harness length before installation. Use the vehicle’s original routing path to avoid heat damage or strain on the lead wire. Confirm the connector is fully seated and clear any diagnostic trouble codes after replacement. Fits 2004-2005 Saturn Vue, downstream, and fits 2003-2004 Saturn Ion, downstream.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and performance. The design is intended to deliver accurate replacement fitment for the listed Saturn Vue and Saturn Ion applications, with attention to sensor durability and reliable exhaust monitoring.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2005SaturnVueDownstreamOE Style
2004SaturnIonDownstreamOE Style
2004SaturnVueDownstreamOE Style
2003SaturnIonDownstreamOE Style
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-2976Bosch — 15044Delphi — ES20366GMC — 12576711NTK — 21041Standard Ignition — SG1731Walker Products — 250-24443Walker Products — 350-34289