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Oxygen Sensor Upstream Air Fuel Ratio Lambda for BMW 528I 535I X3 X6

SKU: 1005011779272435-Default Title
Default Title
€49,64
-38% €79,43 €49,64

The Oxygen Sensor Upstream Air Fuel Ratio Lambda for BMW 528I 535I X3 X6 is a direct-fit, heated O2 sensor designed to monitor the air-fuel balance before the catalytic converter. Using a piezoelectric sensing element, it provides fast, precise readings to the engine control unit, helping your BMW maintain optimal combustion, reduce emissions, and improve throttle response. This upstream/front probe plays a crucial role in dialing in fuel mixture across driving conditions, so you can enjoy smoother starts, steadier idle, and better overall efficiency.

Compatible with a range of BMW models, this sensor is a reliable replacement that aligns with OEM specifications. It fits:

  • BMW 528i (2011)
  • BMW 535i (2008–2010)
  • BMW 535xi (2008)
  • BMW 740i (2011–2012)
  • BMW 740Li (2011–2012)
  • BMW X3 (2010–2012)
  • BMW X6 (2008–2010)

Key identifiers include OEM numbers 234-5027, 2345027, 11787557758, 11787586693, and 11787589139, ensuring compatibility with factory part databases. The sensor features heating for quick responsiveness in cold starts and a robust upstream/front probe design tuned for accurate lambda measurements. Originating from Mainland China, this part is manufactured to meet stringent automotive standards and is intended for permanent installation when replacing a worn or failing upstream O2 sensor.

Benefits & Tips

  • Restore accurate air-fuel sensing to improve fuel economy and reduce emissions during every phase of driving.
  • Enhance engine idle stability and throttle response by giving the ECU reliable feedback on the exhaust gas composition.
  • Operate more effectively in cold starts thanks to the built-in heating feature that speeds up sensor warm-up.

Product specifications

  • Brand: IWOKPHD
  • Sensor Type: Piezoelectric
  • Heating Type: Heating
  • Measuring Range/Function: Upstream Front Probe Air Fuel Ratio Lambda (O2 Sensor)
  • OEM Numbers: 234-5027, 2345027, 11787557758, 11787586693, 11787589139
  • Origin: Mainland China
  • Application Coverage: BMW 528i (2011), 535i (2008–2010), 535xi (2008), 740i (2011–2012), 740Li (2011–2012), X3 (2010–2012), X6 (2008–2010)

Package includes:

  • 1 x Oxygen Sensor

Warnings/Reminders

  • Please verify compatibility with your exact vehicle year and model before purchasing.
  • All items ship within 2 working days after payment is confirmed.
  • Import duties, taxes, and charges are not included in the item price or shipping costs; these charges are the buyer’s responsibility.
  • Shipping times are estimates and can vary with season or weather conditions.
  • We will replace malfunctioning items when received if returned in original packaging. Warranty: 1 year (Replacement Warranty).
  • Item must be returned in original packing and condition to qualify for replacement.
  • Contact us before returning items or leaving non-positive feedback; we will address issues promptly.

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

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