Oxygen Sensor 11781433940 Compatible With BMW M54

Precision oxygen sensor engineered for BMW M54 engines, delivering accurate air-fuel ratio monitoring for optimal combustion efficiency. The 11781433940 sensor maintains peak engine performance, fuel economy, and emissions compliance. Direct OEM compatibility ensures seamless integration without modification. Essential for vehicles experiencing rough idle, check engine lights, or fuel trim issues. Reliable diagnostics and longevity make this a trusted choice for BMW enthusiasts and technicians seeking factory-grade performance restoration.

OEM-specification oxygen sensor (11781433940) designed for BMW M54 powerplants. This critical emissions component monitors exhaust gas composition to optimize fuel injection timing and air-fuel ratios in real time. Restores proper lambda feedback when factory sensors degrade, eliminating rich-running conditions, elevated fuel consumption, and diagnostic trouble codes. Direct fitment—no adapters or modifications required. Manufactured to stringent quality standards for durability and precision. Ideal for M54-equipped models requiring authentic replacement parts to maintain engine efficiency and regulatory compliance.