I have a 99 cougar an I was told it needs a new computer? on 1999 Mercury Cougar

I need to know how much a computer will cost me in my 99 cougar. Please help! Will it affect my driving? Someone explain please

Asked by for the 1999 Mercury Cougar
2 answers
who told you it needed a computer?
Why do they say it needs replaced ? Just trying to see if you really need another. Be back in the morning.