I bought a Bosch LSU 4.9 sensor for my Innovate LM-2 but the plug is different. Is there an adapter?

Your LM-2 was set up for the older Bosch LSU 4.2. There is no adapter. To use the LSU 4.9 you need (1) a firmware update of the LM-2 to support the 4.9 and (2) the LSU 4.9 sensor cable (Innovate 3887). Alternatively, return the 4.9 sensor and we will exchange it for a 4.2.