2007 polo engine

[briste]

new member here not sure where to post . my grandson purchased a 2007 polo 1.4 bky engine with two stripped motors 1 manual 1auto the polo is auto i have rebuilt the auto motor but do not know what crankshaft reluctor to use there is a toothed one and one that is like a metal ring with no teeth can anyone point me in the right direction thanks in advance