 I bought my car brand new in June '08.The main reason I bought an Optima is because all the safety airbags on it.it really did seem to be a safe car on the market at that time.Since then I have seen a main complaint that the airbags DO NOT deploy when there is an impact.That gave me a really big concern.Well, now my car is cutting off with me as I start down the road and I have been told it is because I have used aftermarket oil filters.BULL!!!!!They put Kia oil filter on and guess what?It is still cutting off with me.I came to a T-intersection one day and it desided to cut off.When it did NO BRAKES, No Power Steering and I had to pull out IN FRONT of another vehicle that was coming and just luckily there was noone coming in other lane so that vehicle could go around me.And I guess that I forgot to mention that my 10 yr old SON was in the car with me.I have taken my car down to the Kia shop in Myrtle Beach, SC every Tuesday for the last 2 months and it also stayed there for 1 full week during that time.NOTHING HAS BEEN DONE EXCEPT A KIA OIL FILTER PUT ON...I"m considering this car to be a LEMON and I have told Kia that it will be on them if this car kills me and my son until it is fixed or replaced.I have been dealing with Wes and Bob at the Kia Service area in Myrtle beach, SC which has been very nice to me but something has to give.I am fixing to list this car under the Lemon Law with my lawyer.The safety of this car SUCKS!!I need help with this.Someone else higher up the ladder needs to step in on this case.Wes has a case number already out with the Technical staff but something has got to be done.I can not have mine and my son's life in jeoperdy like this. THIS CAR IS DANGEROUS.I have dropped it off AGAIN at the Kia Service area this evening (09/03/12) for the ump-teenth time so it can be checked out again tomorrow.I will travel ANOTHER 45 min to check on it tomorrow.My days off from work should NOT be spent at the Kia Service area.