We keep this oil level sensor on the shelf because it is the unit we send out most for SHACMAN trucks. When the fuel gauge starts jumping around, sitting on empty, or reading full on a half tank, the sender in the tank is usually the part that has finally given up. This sensor replaces original number DZ91189551042 with the same fit and the same resistance signal, so the gauge reads correctly again without touching the wiring. Where it fits SHACMAN Delong F3000, X3000, H3000