OTTO Excavator Spare Parts 45Nx 4Le2 Relay 5825500290 582550-0290 5-82550029-0 For Isuzu The OTTO Excavator Spare Parts 45Nx 4Le2 Relay, with part numbers 5825500290, 582550-0290, 5-82550029-0, is designed for Isuzu engines. This relay is a crucial electrical component in the excavator's system, ensuring proper functioning by controlling the flow of electricity to different parts. It plays a key role in the overall electrical operation of the excavator, providing the necessary power for various functions.