Description
The Cylinder 1 & 4 After-Catalytic Lambda Sensor (11787545243) is a high-precision oxygen sensor designed to monitor exhaust gases after they pass through the catalytic converter. This post-cat O2 sensor ensures accurate air-fuel mixture readings, reduced emissions, and improved overall engine efficiency.
Manufactured to strict OEM standards, the sensor provides reliable real-time data to the engine control unit (ECU), helping maintain smooth performance, optimal fuel economy, and compliance with emission regulations. A worn or faulty lambda sensor can trigger engine warning lights, cause poor fuel mileage, unstable idling, and increased emissions — making replacement essential.
This sensor is compatible with various BMW petrol engines that require part 11787545243, offering a perfect fit and long-lasting durability.
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