Denso 234-4938 Oxygen Sensor - Upstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4938 Oxygen Sensor - Upstream

Brand Denso 234-4938
Position Upstream
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 20.16
Product line OE Style
Fits Hyundai and Kia · 8 vehicles

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

Heated sensor. Helps deliver faster response and consistent operation.

Exclusive aluminum oxide trap layer helps protect the ceramic element.

Cross-references Bosch 16149, Hyundai 3921023800 and Kia 3921023800 for the same application. See all 6.

$83.89Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $83.89
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 Oxygen Sensor options

OE-Style Oxygen Sensor for Hyundai and Kia

The Denso 234-4938 is an OE-style heated oxygen sensor built for specific-fit replacement on select Hyundai and Kia applications. It is engineered to match factory-style fitment and signal performance for upstream exhaust monitoring on the listed vehicles.

Key Features

  • Heated oxygen sensor for faster operating readiness
  • Specific-fit design for direct replacement on the listed applications
  • 4-wire configuration for factory-style electrical connection
  • 20.16 in. wiring harness length
  • OE-style construction for accurate fit and dependable sensor response

Product Details

Denso’s OE Style sensor line is built and tested to OE standards, with precision manufacturing for exact replacement fit. The 234-4938 uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and consistent exhaust feedback. This part number 234-4938 is a direct replacement choice for drivers servicing upstream oxygen sensor faults on Hyundai Elantra, Kia Soul, and Hyundai Tiburon applications.

This part cross-references Bosch 16149 for the same application.

What It Helps Address

  • Check engine light related to oxygen sensor performance
  • Rough idle or drivability issues tied to incorrect air-fuel feedback
  • Reduced fuel economy from inaccurate exhaust readings
  • Slow sensor response during closed-loop operation
  • Upstream sensor failure on emissions control systems

Installation Notes

Fits 2009-2012 Hyundai Elantra, Upstream. Fits 2010-2011 Kia Soul, Upstream. Fits 2007-2008 Hyundai Tiburon, Upstream. Verify connector style, harness routing, and exhaust location before installation. Use the vehicle’s service information to confirm the upstream sensor position and clear diagnostic trouble codes after replacement.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and performance. The OE-style design and contamination-resistant element protection are intended to deliver accurate replacement on the specified Hyundai and Kia applications.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2012HyundaiElantraUpstreamOE Style
2011HyundaiElantraUpstreamOE Style
2011KiaSoulUpstreamOE Style
2010HyundaiElantraUpstreamOE Style
2010KiaSoulUpstreamOE Style
2009HyundaiElantraUpstreamOE Style
2008HyundaiTiburonUpstreamOE Style
2007HyundaiTiburonUpstreamOE Style
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 16149Hyundai — 3921023800Kia — 3921023800NTK — 25683Walker Products — 250-24768Walker Products — 350-34344