HomeEmission Control > SensorsWalker 350-33032 Oxygen Sensor - Upstream
Part #: 350-33032

Walker 350-33032 Oxygen Sensor - Upstream

Walker Products Aftermarket, Upstream
7 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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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products Aftermarket, Upstream
Fitment: BMW, M5, M6, 535i, 635CSi, and L6
Easy Returns — Return within 60 days for a full refund
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Overview of Walker 350-33032 Oxygen Sensor for BMW Models

The Walker 350-33032 oxygen sensor is designed specifically for select BMW vehicles, including the 535i, 635CSi, M5, and M6 models. This heated oxygen sensor ensures accurate emission control and optimal engine performance by monitoring exhaust gases effectively.

  • Heated sensor type for faster response times
  • Specific fit for BMW 535i, 635CSi, M5, and M6
  • Threaded mounting with 18.0 mm thread diameter
  • 66.85 inches wiring harness length with 3 wires of 20 gauge
  • Radiused polygon male connector for secure connection
  • Overall length of 70.39 inches for proper installation

Detailed Product Features and Specifications

This oxygen sensor from Walker Products Aftermarket is engineered with a heated sensor element to provide quicker warm-up and more accurate readings under various operating conditions. The sensor features a 66.85-inch wiring harness with three 20-gauge wires, allowing for reliable electrical connectivity. Its radiused polygon male connector ensures a precise and secure fit, reducing the risk of connection issues. The threaded mounting type with an 18.0 mm thread diameter facilitates straightforward installation in the exhaust system. The overall length of 70.39 inches accommodates proper placement within the vehicle’s emission control system.

Walker Products Aftermarket Line Information

The Walker Products Aftermarket line focuses on delivering emission control components that meet or exceed OEM specifications. This product line emphasizes compatibility and durability, providing replacement parts tailored to specific vehicle makes and models. The 350-33032 oxygen sensor is part of this line, ensuring it aligns with the performance and fitment requirements of BMW vehicles such as the 535i, 635CSi, M5, and M6.

Common Applications and Problem Resolution

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

Installation Notes and Tips

When installing the Walker 350-33032 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use appropriate tools to avoid damaging the 18.0 mm thread diameter. Verify the radiused polygon male connector is securely attached to the vehicle’s wiring harness. It is recommended to compare the new sensor’s wiring harness length and connector type with the original to confirm compatibility. Follow vehicle-specific service manual instructions for torque specifications and sensor placement.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet industry standards for emission control components. While specific warranty details for part number 350-33032 are not provided here, Walker typically offers coverage against defects in materials and workmanship. Users should consult product documentation or authorized sources for exact warranty terms.

BrandWalker
Part Number350-33032
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length70.39
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity3
Wiring Harness Length66.85

This part fits 7 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1988BMWM53.5LL6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1988BMWM63.5LL6GASUpstreamOxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket
1988BMWM63.5LL6GASUpstreamUpstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket
1987BMW535i3.5LL6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1987BMW635CSi3.5LL6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1987BMWM63.5LL6GASUpstreamOxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket
1987BMWM63.5LL6GASUpstreamUpstream oxygen sensor for cylinders 4-6.; 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.