On cold mornings Under 32 degrees the car does not turn over. When the outside temp warms up 40 degrees+ it will start. 2003 mini cooper

try to turn the engine by hand

in cold weather diesel gels up and sometimes causes a no start issue..a cetane fuel additive helps with this issue. if temps go below 20 degrees, add a quart per tankful of cetane to the fuel to help start on cold mornings. also diesels require more amperage to crank than gas engines do..thus a stronger battery is needed..

Hello.
If the outside temperature is below 32 degrees, your battery loses as much as 15% of the amps that are responsible for turning the engine over.
On your battery you should have a sticker that shows a rating for "Cranking amps," ( CA ) above 32 degrees, and "Cold crancking amps" ( CCA ), below 32 degrees. Your car most likely needs atleast 700 CCA.

Also, if you do not have a maintenance free battery, ( It should say right on the sticker if it is. ), you may want to check the levels in your battery. If the cells are low it will prevent the battery from reaching a full charge.

I hope this helps you

LOL repeating questions. Its your ignition switch. its a common problem with ions ( I myself have a 04 ion and had it replaced twice in 3 years) repair is around 400 dollars with labor. Just google "ion not starting in cold weather" and youll get TONS of threads. No recall either its stupid

have car scanned look at tps minnum should be around .50 at key on or running
also look at ect sensor if possible when ehgine is cold temp on engine should be within 5 degrees of outside temp
hope this helps.

If you have removed the front bumper then there were holes in the metal bumper the size of baseballs on either side. Just to the outside of these holes and behind on the core support is where the horns are suppose to be. Your outside temp gauge should be the longest wire on the drivers side that comes through the metal and attaches to the inside of the plastic bumper.

sounds like moisture problem

Check the Cold Cranking Amps on your Battery. Might Help to get a Better Battery. Interstate Batteries have NEVER Let me down.

if you went to Kia dealer last Feb and they did not solve problem and it is still a problem in Dec, then you are the problem. Make the dealer fix the darn thing!

Some times there is chime to indicate cold temperature and the temp will flash on the tach. When you start up there is a chime when you are due for service. check the speedometer at the milage reading when you start your car. it will say under it oil service or inspection that is the mileage left till the service should be performed. Let me know if this helps.