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Oxygen Sensor Upstream for Mazda 3, 6, CX-7 2.3L L4

SKU: 1005012169970484-Default Title
Default Title
€51,37
-38% €82,20 €51,37

Upgrade your Mazda’s fuel-management accuracy with the Oxygen Sensor Upstream for Mazda 3, 6, CX-7 2.3L L4. This upstream O2 sensor from IWOKPHD is designed to monitor the exhaust’s oxygen content precisely, feeding real-time data to your vehicle’s ECU. The result? Optimized air-fuel mixture, reduced emissions, smoother idling, and better overall performance—especially in cold starts where fast sensor response matters.

Key features include a piezoelectric sensing element and a built-in heating element. The heating capability helps the sensor reach its optimal operating temperature faster, delivering quicker, more stable readings and protecting against sluggish response that can occur in cool conditions. This design supports efficient combustion, improved throttle response, and can contribute to better fuel economy over time.

This sensor is specifically tailored for:

  • MAZDA 3 (2010-2013)
  • MAZDA 6 (2006-2007)
  • MAZDA CX-7 (2007-2012)

For reference, the part numbers and variations you may encounter include L33L-18-8G1B, L33L188G1B9U, L33L-18-8G1B-9U, L33L188G1E9U, L3BT188G1, and 234-5012 / 2345012 / 24356 / 24392. The unit is built for 2.3L L4 engines and is crafted to meet the demands of daily driving as well as longer highway runs.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Benefits & Tips

  • Experience smoother idling and more consistent engine performance by renewing your upstream O2 sensor on compatible Mazda models.
  • Expect faster cold-start response thanks to the built-in heater, reducing ECU compensation lag during initial drive.
  • After installation, allow the ECU to relearn the new sensor data for optimal fuel trimming and emissions, and monitor for any check engine light changes.

Product specifications

  • Brand: IWOKPHD
  • Sensor Type: Piezoelectric
  • Heating Type: Heating
  • Application: Upstream oxygen sensor for Mazda 3 (2010-2013), Mazda 6 (2006-2007), Mazda CX-7 (2007-2012)
  • Engine compatibility: 2.3L L4
  • Part numbers / variations: L33L-18-8G1B, L33L188G1B9U, L33L-18-8G1B-9U, L33L188G1E9U, L3BT188G1, 234-5012, 2345012, 24356, 24392
  • Origin: Mainland China
  • Warranty: 2 years (Replacement Warranty)

Package includes:

  • 1 pcs

Warnings / Reminders

  • Please check the picture and the part number carefully to ensure you bought the right part for your car.
  • If you are unsure which item fits your car, please send the Part Number or the original product photos to confirm before ordering.
  • The only sure way to confirm fit is to compare with your original part; the seller can check for you and respond within 24 hours.

Language support

Language support: English

Trust and reliability matter when it comes to replacement parts. Providing quality and trusted service since 2002 at intercyprus.com.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

At intercyprus.com since 2002 — trusted for quality and reliability.