OTTO Excavator Spare Parts Zx120 4Bg1 Relay 1825503100 182550-3100 1-82550310-0 For Isuzu This product is a relay designed for use with Isuzu engines, specifically compatible with OTTO Excavator Spare Parts Ex300-5 6Sd1T models. The part number for this relay is 8943795430, with alternative numbers 894379-5430 and 8-94379543-0.