2010 V6 vehicle has 71K miles on it and I bought it in 01/2022 from a dealer. Not sure if timing belt replacement has been done by previous owner. Manual says it needs to be replaced in the earliest of 8 years / 100K miles. But when I tried to find what my next MM code would be, it says A12. I'm wondering does this mean the previous owner did the timing belt job ( as 8 years has been passed ) or they might have just reset the MM code manually. Or does the MM subitem 4 even pop up after 8 years?