Description A replacement genuine Bosch LSU 4.2 probe, as used with a lot of wideband AFR systems including older Innovate, TechEdge and Zeitronix. Note that some newer Innovate and other systems now use the 7025 type LSU 4.9 sensor. Please check the part number on your old sensor before ordering a replacement. Original Bosch part number : 0258007057. Note, we currently supply the same sensor but with a longer cable, part number 0258007351. It is 100% compatible. It is fitted with the common “7057” type 6 pin connector shown below: