HomeEmission Control > SensorsWalker 250-24393 Oxygen Sensor - Upstream Left or Upstream Right
Part #: 250-24393

Walker 250-24393 Oxygen Sensor - Upstream Left or Upstream Right

Walker Products OE, Upstream Left
⚙️ 14 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$84.58Free 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 OE, Upstream Left
🚗Fitment: Audi, A8 Quattro and S8
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Products OE Oxygen Sensor 250-24393

The Walker Products OE Oxygen Sensor 250-24393 is designed specifically for Audi A8 Quattro and S8 models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

  • Heated sensor type for faster response times
  • Specific fit for Audi A8 Quattro and S8
  • 13.31-inch wiring harness length for proper 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 16.85 inches for correct positioning

Detailed Product Description

This oxygen sensor from Walker Products OE is engineered to meet the exact specifications required by Audi A8 Quattro and S8 vehicles. The heated sensor design allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Featuring a 13.31-inch wiring harness and 22 gauge wires, it provides a durable and stable electrical connection. The radiused polygon male connector ensures a precise fit, minimizing the risk of disconnection or signal loss. Its threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that match or exceed factory specifications. This oxygen sensor is part of that line, ensuring compatibility and performance tailored to specific vehicle models like the Audi A8 Quattro and S8. Using parts from the Walker Products OE line helps maintain the integrity of your vehicle’s emission control system.

Common Applications and Issues Addressed

  • Restores accurate oxygen sensing for proper air-fuel mixture
  • Helps resolve rough idling and engine hesitation
  • Reduces emissions and prevents failed emissions tests
  • Eliminates check engine light related to oxygen sensor faults
  • Improves fuel economy by providing correct sensor data

Installation Notes and Tips

Ensure the vehicle is cool before installation to avoid burns. Use the 18.0 mm threaded mounting to securely install the sensor in the exhaust manifold or pipe. Verify the radiused polygon male connector matches the vehicle harness to prevent connection issues. Handle wiring carefully to avoid damage to the 22 gauge wires and maintain sensor functionality.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, these sensors typically come with a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.

BrandWalker
Part Number250-24393
PositionWalker Products OE, Upstream Left
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length16.85
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement22
Wire Quantity4
Wiring Harness Length13.31

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2003AudiA8 Quattro4.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2003AudiA8 Quattro4.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2003AudiS84.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2003AudiS84.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2002AudiA8 Quattro4.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2002AudiA8 Quattro4.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2002AudiS84.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2002AudiS84.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2001AudiA8 Quattro4.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2001AudiA8 Quattro4.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2001AudiS84.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2001AudiS84.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE
2000AudiA8 Quattro4.2LV8GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products OE
2000AudiA8 Quattro4.2LV8GASUpstream LeftInstall upstream oxygen sensor on the left side.; Walker Products OE

* 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.