HomeEmission Control > SensorsWalker 350-34451 Oxygen Sensor - Downstream Front or Downstream Rear
Part #: 350-34451

Walker 350-34451 Oxygen Sensor - Downstream Front or Downstream Rear

Walker Products Aftermarket, Downstream Rear
⚙️ 19 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$58.77Free 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 Rear
🚗Fitment: Acura and Honda, MDX and Accord
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-34451 Oxygen Sensor

The Walker 350-34451 oxygen sensor is designed specifically for Acura and Honda vehicles, including the Accord and MDX models. 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 Acura Accord and Honda MDX
  • 23.15 inches wiring harness length for precise installation
  • 22 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 26.69 inches for proper fitment

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components engineered to meet or exceed OEM specifications. The line emphasizes compatibility and durability, ensuring that parts like the 350-34451 oxygen sensor maintain vehicle emissions compliance and engine efficiency for Acura and Honda models.

Product Description and Attributes

The Walker 350-34451 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor includes a 23.15-inch wiring harness with 22 gauge wires and four wires total, which supports accurate data transmission to the vehicle’s engine control unit. Its radiused polygon male connector ensures a secure and precise fit, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation. The overall length of 26.69 inches accommodates the specific routing requirements of Acura Accord and Honda MDX exhaust systems.

Common Applications and Issues Addressed

  • Helps maintain proper air-fuel mixture for efficient combustion
  • Reduces engine misfires and rough idling
  • Prevents increased emissions and failed emissions tests
  • Improves fuel economy by providing accurate oxygen level readings
  • Resolves check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Walker 350-34451 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 18.0 mm threaded sensor to prevent damage. Verify the radiused polygon male connector aligns properly with the vehicle harness to ensure a secure connection. Follow torque specifications recommended by the vehicle manufacturer to avoid sensor or exhaust system damage.

Quality Assurance and Warranty

Walker Products Aftermarket parts, including the 350-34451 oxygen sensor, are manufactured to meet stringent quality standards. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability and performance in Acura and Honda vehicles.

BrandWalker
Part Number350-34451
PositionWalker Products Aftermarket, Downstream Rear
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length26.69
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement22
Wire Quantity4
Wiring Harness Length23.15

This part fits 19 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2020AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearB1S2; Downstream; Rear; Walker Products Aftermarket
2020AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearDownstream rear oxygen sensor indicating Bank 1 Sensor 2 position; Walker Products Aftermarket
2019AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearB1S2; Downstream; Rear; Walker Products Aftermarket
2019AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearDownstream rear oxygen sensor indicating Bank 1 Sensor 2 position; Walker Products Aftermarket
2018AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearB1S2; Downstream; Rear; Walker Products Aftermarket
2018AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearDownstream rear oxygen sensor indicating Bank 1 Sensor 2 position; Walker Products Aftermarket
2017AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearB1S2; Downstream; Rear; Walker Products Aftermarket
2017AcuraMDXSport Hybrid3.0LV6ELECTRIC/GASDownstream RearDownstream rear oxygen sensor indicating Bank 1 Sensor 2 position; Walker Products Aftermarket
2012HondaAccord3.5LV6GASDownstream FrontDownstream front oxygen sensor required.; Walker Products Aftermarket
2011HondaAccord3.5LV6GASDownstream FrontDownstream front oxygen sensor required.; Walker Products Aftermarket
2010HondaAccord3.5LV6GASDownstream FrontDownstream front oxygen sensor required.; Walker Products Aftermarket
2009HondaAccord3.5LV6GASDownstream RearDownstream Rear Oxygen Sensor for Non-Calif-ESV models.; Walker Products Aftermarket
2009HondaAccord3.5LV6GASDownstream FrontNon Calif-ESV No Calif-ESV Downstream Front; Walker Products Aftermarket
2009HondaAccord3.5LV6GASDownstream RearNon Calif-ESV; Downstream; Rear; Walker Products Aftermarket
2009HondaAccord3.5LV6GASDownstream FrontNon Calif-ESV; Downstream; Front; Walker Products Aftermarket
2008HondaAccord3.5LV6GASDownstream RearDownstream Rear Oxygen Sensor for Non-Calif-ESV models.; Walker Products Aftermarket
2008HondaAccord3.5LV6GASDownstream FrontNon Calif-ESV No Calif-ESV Downstream Front; Walker Products Aftermarket
2008HondaAccord3.5LV6GASDownstream RearNon Calif-ESV; Downstream; Rear; Walker Products Aftermarket
2008HondaAccord3.5LV6GASDownstream FrontNon Calif-ESV; Downstream; Front; 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.