HomeEmission Control > SensorsWalker 350-35043 Oxygen Sensor - Upstream
Part #: 350-35043

Walker 350-35043 Oxygen Sensor - Upstream

Walker Products Aftermarket, Upstream
⚙️ 5 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$118.01Free 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, Upstream
🚗Fitment: Mazda, CX-7
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-35043 Oxygen Sensor for Mazda CX-7

The Walker 350-35043 oxygen sensor is designed specifically for the Mazda CX-7, providing precise emission control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a radiused polygon connector, ensuring a secure and accurate fit for your vehicle.

  • Heated oxygen sensor for improved response time
  • Specific fit for Mazda CX-7 models
  • Threaded mounting with 18.0 mm thread diameter
  • 17.24-inch wiring harness length with 5 wires
  • Radiused polygon connector with male and female ends
  • 20-gauge wire for reliable electrical performance
  • Overall length of 20.79 inches for proper installation

Detailed Product Features and Specifications

The Walker 350-35043 oxygen sensor is engineered with a heated sensor element to provide faster warm-up times and more accurate oxygen level readings. It includes a 17.24-inch wiring harness with five wires, each 20 gauge, to ensure consistent signal transmission. The sensor’s connector features a radiused polygon shape with both male and female ends, designed to match the original equipment specifications for the Mazda CX-7. The threaded mounting type with an 18.0 mm diameter allows for secure installation and compatibility with the vehicle’s exhaust system. The overall length of 20.79 inches supports proper placement within the emission control system.

Walker Products Aftermarket Line Information

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable replacement parts that meet or exceed OEM standards. The product line emphasizes precise fitment and durability, making it suitable for emission control applications such as the Mazda CX-7. Walker Products Aftermarket parts are designed to integrate seamlessly with existing vehicle systems, ensuring consistent performance and compliance with emission regulations.

Common Applications and Issues Addressed

  • Maintaining accurate air-fuel mixture readings for optimal engine performance
  • Reducing harmful emissions by ensuring proper catalytic converter function
  • Resolving check engine light triggers related to oxygen sensor faults
  • Improving fuel efficiency by providing accurate sensor data
  • Preventing engine misfires caused by faulty oxygen sensor signals

Installation Notes and Tips

When installing the Walker 350-35043 oxygen sensor on a Mazda CX-7, ensure the threaded mounting is properly tightened to the manufacturer’s torque specifications to avoid exhaust leaks. Verify the wiring harness length and connector shape match the vehicle’s original sensor to prevent electrical connection issues. It is recommended to disconnect the battery before installation to avoid electrical shorts. Use anti-seize compound on the sensor threads if specified by the vehicle manufacturer to facilitate future removal.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors undergo rigorous testing to meet emission control standards and ensure durability under typical operating conditions. The 350-35043 part number is backed by Walker’s quality assurance protocols, providing confidence in fitment and function. Warranty details should be confirmed with the product documentation or supplier, as coverage may vary.

BrandWalker
Part Number350-35043
PositionWalker Products Aftermarket, Upstream
Connector GenderFemale
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length20.79
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity5
Wiring Harness Length17.24

This part fits 5 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2012MazdaCX-72.5LL4UpstreamOE Replacement
2011MazdaCX-72.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2011MazdaCX-72.5LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2010MazdaCX-72.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2010MazdaCX-72.5LL4GASUpstreamFront oxygen sensor compatible with various 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.