HomeEmission Control > SensorsWalker 350-34989 Oxygen Sensor - Downstream
Part #: 350-34989

Walker 350-34989 Oxygen Sensor - Downstream

Walker Products Aftermarket, Downstream
23 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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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: Audi, A8 Quattro
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-34989 Oxygen Sensor

The Walker 350-34989 oxygen sensor is designed specifically for select Audi and Volkswagen models, including the A8 Quattro, Caddy, Jetta, and Virtus. 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 Audi and Volkswagen vehicles
  • Threaded mounting type with 18.0 mm thread diameter
  • 25.39 inches wiring harness length with 4 wires of 20 gauge
  • Radiused polygon male connector for secure connection
  • Overall length of 28.54 inches for proper installation

Detailed Product Description

This oxygen sensor from Walker Products Aftermarket is engineered to meet the exact specifications required by your vehicle’s emission system. The heated sensor element allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 4-wire design includes a dedicated heater circuit, ensuring consistent sensor performance under various driving conditions. The radiused polygon male connector provides a reliable electrical connection, minimizing the risk of signal loss or corrosion. With a threaded mounting type and an 18.0 mm thread diameter, installation is straightforward and secure.

Walker Products Aftermarket Line

Walker Products Aftermarket offers a comprehensive range of emission control components designed to meet or exceed OEM standards. This product line focuses on delivering reliable, vehicle-specific parts that support emission compliance and engine management systems. The 350-34989 oxygen sensor is part of this line, providing a precise fit and function for Audi and Volkswagen models, ensuring compatibility and durability.

Common Applications and Issues Addressed

  • Helps maintain proper air-fuel mixture for efficient combustion
  • Reduces harmful emissions by accurately monitoring exhaust gases
  • Prevents engine performance issues related to faulty oxygen sensors
  • Addresses check engine light triggers related to sensor failure
  • Supports optimal fuel economy by providing accurate sensor data

Installation Notes and Tips

  • Ensure vehicle compatibility with Audi A8 Quattro, Volkswagen Caddy, Jetta, or Virtus before installation
  • Use proper tools to avoid damaging the 18.0 mm threaded mounting
  • Check wiring harness length (25.39 inches) and connector type for fitment
  • Handle the sensor carefully to avoid contamination of the sensing element
  • Follow vehicle manufacturer torque specifications during installation

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards, ensuring reliable performance and durability. While specific warranty details for part number 350-34989 may vary, Walker typically offers coverage against defects in materials and workmanship. Always refer to the product documentation or manufacturer for exact warranty terms.

BrandWalker
Part Number350-34989
PositionWalker Products Aftermarket, Downstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length28.54
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length25.39

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2021VolkswagenVirtus1.6LL4UpstreamOE Replacement
2020VolkswagenJetta1.6LL4UpstreamOE Replacement
2020VolkswagenVirtus1.6LL4UpstreamOE Replacement
2017VolkswagenCaddy1.2LL4UpstreamOE Replacement
2016AudiA8 Quattro6.3LW12GASDownstreamCyl 8,10,12; Cil 8,10,12; Downstream; Walker Products Aftermarket
2016AudiA8 Quattro6.3LW12GASDownstreamCyl 7,9,11; Cil 7,9,11; Downstream; Walker Products Aftermarket
2016AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Cil 2,4,6; Downstream; Walker Products Aftermarket
2016AudiA8 Quattro6.3LW12GASDownstreamCylinders 8, 10, 12 Downstream; Walker Products Aftermarket
2016AudiA8 Quattro6.3LW12GASDownstreamCyl 7,9,11; Downstream; Walker Products Aftermarket
2016AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Downstream; Walker Products Aftermarket
2016VolkswagenCaddy1.2LL4UpstreamOE Replacement
2015AudiA8 Quattro6.3LW12GASDownstreamCyl 8,10,12; Cil 8,10,12; Downstream; Walker Products Aftermarket
2015AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Cil 2,4,6; Downstream; Walker Products Aftermarket
2015AudiA8 Quattro6.3LW12GASDownstreamCyl 7,9,11; Cil 7,9,11; Downstream; Walker Products Aftermarket
2015AudiA8 Quattro6.3LW12GASDownstreamCylinders 8, 10, 12 Downstream; Walker Products Aftermarket
2015AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Downstream; Walker Products Aftermarket
2015AudiA8 Quattro6.3LW12GASDownstreamCyl 7,9,11; Downstream; Walker Products Aftermarket
2014AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Cil 2,4,6; Downstream; Walker Products Aftermarket
2014AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Downstream; Walker Products Aftermarket
2013AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Cil 2,4,6; Downstream; Walker Products Aftermarket
2013AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Downstream; Walker Products Aftermarket
2012AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Cil 2,4,6; Downstream; Walker Products Aftermarket
2012AudiA8 Quattro6.3LW12GASDownstreamCyl 2,4,6; Downstream; 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.