HomeEmission Control > SensorsWalker 350-34170 Oxygen Sensor - Downstream
Part #: 350-34170

Walker 350-34170 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
$69.02Free 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: Volvo, S40 and V40
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Oxygen Sensor 350-34170 for Volvo S40 and V40

The Walker 350-34170 oxygen sensor is designed specifically for Volvo S40 and V40 models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

  • Heated oxygen sensor with 4-wire configuration
  • Specific fit for Volvo S40 and V40 vehicles
  • Threaded mounting with 18.0 mm thread diameter
  • 35.75 inches wiring harness length and 39.29 inches overall length
  • 20 gauge wire for reliable signal transmission
  • Radiused polygon male connector for secure connection

Detailed Features and Specifications

The Walker 350-34170 oxygen sensor is a heated sensor designed to provide accurate air-fuel mixture readings for emission control systems. It includes a 4-wire setup, which supports both the sensor signal and the heating element, allowing for faster sensor response times and improved fuel efficiency. The wiring harness length measures 35.75 inches, providing ample reach for installation in the engine bay, while the overall length is 39.29 inches. The sensor’s 18.0 mm threaded mounting ensures a secure fit in the exhaust system. The connector features a radiused polygon shape with a male gender, designed to match the factory wiring harness on Volvo S40 and V40 models. The 20 gauge wire measurement supports durability and consistent electrical performance.

Walker Products Aftermarket Line

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable emission control components tailored to specific vehicle applications. Walker Products Aftermarket parts are engineered to meet or exceed OEM specifications, ensuring compatibility and performance for vehicles like the Volvo S40 and V40. This product line emphasizes precise fitment and quality materials to support emission compliance and engine efficiency.

Common Applications and Issues Addressed

  • Restores accurate oxygen sensing for proper air-fuel mixture control
  • Helps resolve engine performance issues related to faulty sensors
  • Reduces emissions by ensuring correct sensor feedback to the ECU
  • Prevents check engine light triggers caused by sensor failure
  • Improves fuel economy by maintaining optimal combustion

Installation Notes and Tips

When installing the Walker 350-34170 oxygen sensor, ensure the vehicle is compatible with this specific part number and fitment for Volvo S40 and V40 models. Use appropriate tools to avoid damaging the 18.0 mm threaded sensor during installation. Verify the connector’s radiused polygon male shape matches the vehicle’s wiring harness for a secure connection. It is recommended to inspect the wiring harness for any damage before installation and to apply anti-seize compound on the threads if necessary to facilitate future removal.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable performance. This part number 350-34170 undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.

BrandWalker
Part Number350-34170
PositionWalker Products Aftermarket, Downstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length39.29
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length35.75

This part fits 10 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2004VolvoS401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2004VolvoV401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2003VolvoS401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2003VolvoV401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2002VolvoS401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2002VolvoV401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2001VolvoS401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2001VolvoV401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2000VolvoS401.9LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2000VolvoV401.9LL4GASDownstreamFits 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.