OTTO Excavator Spare Parts Ex300-5 6Sd1T Relay 8943795430 894379-5430 8-94379543-0 For Isuzu This product is a relay designed for use with Isuzu engines, specifically for the Ex300-5 model with the 6Sd1T engine. The relay part number is 8943795430, also identified as 894379-5430 and 8-94379543-0.