My stang last summer would intermittently stall and sometimes start right up

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but sometimes I would have to wait a few, then it just stopped doing that and it was fine, now recently I have had my airbag, low oil, and low coolant lights randomly coming on when fluids are checked they are not low. Also, my car has started turning over excessively before it will start and sometimes takes several tries. I have a new clutch, new battery, new smog pump, new serpentine belt, just in case any of that info helps you answer this question, what do you think the problem is?