This Bosch Lambda Sensor is designed for optimal engine combustion and improved engine efficiency. It supports the ECU in measuring the air-fuel mixture and is functionally and quality tested to the same standards as original equipment parts, ensuring high performance and reliability over a long service life. The sensor features a vehicle-specific connector for a secure electrical connection and is ready for installation. Recommended replacement interval is 160,000 km. It has 4 circuits and an overall length of 320 mm. This part is also available as a universal article under part number 0258986505. It replaces part numbers 0258005309. It is compatible with various BMW models including 3 Series (E46), 5 Series (E60, E61, E39), X3 (E83), Z3 Roadster (E36), Z4 Roadster (E85), X5 (E53), 7 Series (E38, E65, E66, E67), and 8 Series (E31). It is also compatible with Land Rover Range Rover III (L322) and Alpina Roadster V8 (E52). The fitting position is before the catalytic converter, suitable for cylinder 1-3 and 4-6, and for left-hand drive vehicles. Construction years range from 04/1998 to 10/2001, with to dates varying between 03/2005 and 09/2006 depending on the specific model. Key cross-references include Borg Warner (BERU) 0 824 010 020, Continental/VDO A2C59513229Z, Delphi S10899, Denso DOX-1174, Magna Steyr 1742050, MTE-THOMSON 7873.40.029, NGK 0193, and Vemo 20-76-0026.