HomeEmission Control > SensorsWalker 350-34574 Oxygen Sensor - Downstream
Part #: 350-34574

Walker 350-34574 Oxygen Sensor - Downstream

Walker Products Aftermarket, Downstream
10 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$72.25Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products Aftermarket, Downstream
Fitment: Hyundai and Kia, Sonata, Optima, and Rondo
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-34574 Oxygen Sensor

The Walker 350-34574 oxygen sensor is designed specifically for select Hyundai and Kia models, including the Magentis, Optima, Rondo, and Sonata. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

  • Heated sensor type for faster response times
  • Specific fit for Hyundai and Kia vehicles
  • 16.26-inch wiring harness length for precise installation
  • 20-gauge wire measurement with 4 wires for reliable signal transmission
  • Radiused polygon male connector for secure connection
  • Threaded mounting type with 18.0 mm thread diameter
  • Overall length of 19.8 inches for proper fitment

Detailed Product Description

This Walker oxygen sensor, part number 350-34574, is engineered to meet the exact specifications of Hyundai and Kia vehicles such as the Magentis, Optima, Rondo, and Sonata. Featuring a heated sensor element, it provides quicker warm-up times compared to non-heated sensors, improving fuel efficiency and reducing emissions sooner after engine start. The sensor includes a 16.26-inch wiring harness with 20-gauge wires and a 4-wire configuration, ensuring accurate and stable signal transmission to the vehicle’s engine control unit. The radiused polygon male connector and threaded mounting type with an 18.0 mm thread diameter allow for a secure and precise installation, maintaining the integrity of the emission control system.

Walker Products Aftermarket Line

The Walker Products Aftermarket line focuses on delivering reliable emission control components that meet or exceed OEM standards. This oxygen sensor is part of that line, providing a direct replacement solution tailored for specific vehicle applications. The product line emphasizes compatibility and durability, ensuring that parts like the 350-34574 oxygen sensor integrate seamlessly with the vehicle’s existing systems.

Common Applications and Issues Addressed

  • Restores accurate oxygen level readings for proper air-fuel mixture
  • Helps resolve engine performance issues such as rough idling or hesitation
  • Reduces emissions to comply with environmental regulations
  • Prevents check engine light triggers related to oxygen sensor faults
  • Improves fuel economy by optimizing combustion efficiency

Installation Notes and Tips

When installing the Walker 350-34574 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct tools to avoid damaging the threaded mounting. Verify the connector shape and gender match the vehicle’s wiring harness for a secure fit. It is recommended to inspect the wiring harness length and routing to prevent strain or damage during installation.

Quality Assurance and Warranty

Walker oxygen sensors undergo rigorous testing to meet emission control standards and provide reliable performance. The 350-34574 sensor is manufactured to precise specifications for Hyundai and Kia vehicles. Warranty details are provided by Walker Products Aftermarket and typically cover defects in materials and workmanship under normal use.

BrandWalker
Part Number350-34574
PositionWalker Products Aftermarket, Downstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length19.8
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length16.26

This part fits 10 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2008HyundaiSonata2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2008KiaMagentis2.4LL4DownstreamOE Replacement
2008KiaOptima2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2008KiaRondo2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2007HyundaiSonata2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2007KiaMagentis2.4LL4DownstreamOE Replacement
2007KiaOptima2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2007KiaRondo2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2006HyundaiSonata2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2006KiaOptima2.4LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.