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Genuine Bosch Motorsport LSU 4.2 Wideband Oxygen Sensor (0 258 007 057). The Bosch Motorsport LSU 4.2 wideband sensor is a proven oxygen sensor designed for motorsport and high-performance applications. With its fast response time and dependable accuracy, it provides precise air-fuel ratio monitoring across a wide range of operating conditions. Optimized for motorsport and aftermarket ECU applications. Provides accurate AFR readings for precise engine calibration. Compatible with most wideband controllers and data systems. The LSU 4.2 has been a long-standing standard in motorsport, trusted by professional teams and tuners worldwide. Manufactured in Germany by Bosch to strict OEM standards, the 0 258 007 057 sensor offers reliable performance and durability, even under demanding track conditions. This sensor is supplied under Bosch part number 0258007057 and is widely used in motorsport ECU and tuning applications where stable and accurate AFR feedback is essential.