Oxygen Sensor Upstream for BMW 325i Lambda O2 11787523434 Replacement Compatible with BMW Engines

Upgrade your BMW with a reliable upstream oxygen sensor (O2) designed to keep your engine running clean and efficiently. This heated, magnetic-induction O2 sensor is an OEM-equivalent replacement built to match the specifications of BMW’s upstream sensor. It supports a broad range of models from 2001 to 2012, including 325CI, 325I, 325XI, 330CI, 330I, 330XI, 525I, 528I, 530I and X3. OEM numbers covered include 11787523434, 234-5137, and 2345137, as well as 11787523435, 11787589138, 13628515640, 7523434, 7523435, 7589138, 8515640, 752343401, 108488, 25025016, 17215, 24315, and V20760090. Origin: Mainland China. This is a single-piece unit designed for upstream placement to help the ECU accurately monitor exhaust gas oxygen levels, enabling precise fuel adjustment, reduced emissions, and better overall drive quality. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Main description

This upstream O2 sensor plays a crucial role in your vehicle’s emissions control and fuel management system. By continuously monitoring the oxygen content in the exhaust, it provides real-time feedback to the engine control unit (ECU), allowing the engine to maintain an optimal air-fuel ratio. The result is smoother idle, improved throttle response, consistent power delivery, and lower fuel consumption over time. Its heating-type design ensures faster and more stable readings after cold starts, so your BMW runs efficiently from the moment you start the engine.

Designed to be a precise fit for popular BMW configurations, this sensor integrates with the factory harness and mounting points, offering a straightforward replacement path when your OEM sensor reaches its service life. It’s compatible with a wide variety of BMW vehicles spanning model years 2001–2012, including the 325 series, 330 series, 525I, 528I, 530I and X3, ensuring many owners can rely on a correct, drop-in replacement without extensive modification.

To maintain confidence in performance, verify the part numbers before purchase and ensure compatibility with your vehicle’s VIN, year, make, and model. If you’re uncertain, contact us with your VIN and vehicle details for a quick fitment check. This product is a ready-to-install upstream sensor, designed to restore accurate oxygen sensing and keep your BMW compliant with emission standards.

Benefits & Tips

• Enhances fuel economy and throttle response by keeping the engine operating at the ideal air-fuel ratio.
• Reduces exhaust emissions and helps your BMW meet modern regulatory standards.
• Ideal for maintenance on older BMWs within the 2001–2012 range, providing a reliable OEM-part replacement to extend engine life.

Product specifications

• Compatible models and years: BMW 325CI (2001–2006), 325I (2001–2005), 325XI (2001–2005), 330CI (2001–2006), 330I (2001–2005), 330XI (2001–2005), 525I (2001–2005), 528I (2010–2011), 530I (2001–2007), X3 (2004–2012).
• Placement on vehicle: Upstream oxygen sensor
• Sensor type: Heating Type; Magnetic Induction
• OEM part numbers: 11787523434, 234-5137, 2345137; 11787523435, 11787589138, 13628515640, 7523434, 7523435, 7589138, 8515640, 752343401, 108488, 25025016, 17215, 24315, V20760090
• Origin: Mainland China
• Warranty: 1 year
• Package includes: 1 piece

Package includes:

• 1pcs

Warnings/Reminders

• Please check the part number before purchasing replacements.
• Make sure you are ordering the correct auto part for your vehicle. If unsure, provide us with the VIN, year, make, and model for verification.

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