I've actually had an intermittent clutch switch issue on another car. But I can't see how that would be related to heat/sun.

Not like an owner's forum, although that would be another place to ask. I'm talking about TSBs, which the manufacturers publish to let owners and service providers know about known problems. You can find them online for pretty much any modern vehicle. LIKE THESE

I'm going to have that looked at and look into a BMW bullentin board as you suggested. Thank you for the rely.

No, haven't run thru any puddles. Someone mentioned a relay right behind the steering under the hood. I'm going to give that a try. Thanks for the reply.

I thought maybe the fuel system was not holding pressure, but it would start after a few tries if this were the case.

Have you had any water intrusion into the cab or driven thru flooded streets recently?  I'm thinking an intermittent ground somewhere..

If you have a manual transmission, you might check the clutch switch that detects you have the clutch depressed before it would let you start the car. - not sure how this could be intermittent, but worth a check so you can eliminate it as a cause. If this is the problem, the engine won't turn over...

I've heard of some Hondas having that problem, something about a relay or switch being mounted up behind the dash where it soaks up the sun. Never heard about MINIs having that issue. Have you checked with BMW to see if there are any technical service bulletins on that problem?

Hi,

Thanks for the reply. It won't start at all. I would have to wait until the sun starts to go down and it will start right up. The battery is brand new and has power when it won't start.

Take it to CarMax on a cloudy day and sell it!

That daylight savings time is wrecking havoc on everything!

When you say it won't start in the mid pm sun, does it start after a few tries or not at all?

Park it in the shade?

still taking a siesta ?

my 2010 mini Cooper starts right up in the morning or late afternoon. But if it is sitting in the sun mid-afternoon it won't start. Can anyone tell me if there's something that can be done?