I'm new to this group, however I have been lurking for a while to try and find anything on the issue my car is having. I don't know if anyone can help but I'm giving it a try.

I got my mini with 108,000 miles on it. About a week after I got it, it started having issues. It wouldn't turn on was the first problem. It would make a ticking noise when I would try to start it and wouldn't turn over AT ALL. Took a few tries, then it turned out. It kept like that for a few days and then one day, my brake lights stayed on and drained my battery. The car now leaves the brake lights on anytime you take the key out. So, My car wouldn't accept a jump right away, it took a while to get my car started like originally, just a tick and nothing. We realized after it kept happening that the issue mostly happened when my car was sitting under the sun for too long and wouldn't do anything. In the mornings and at night It would get better and turn on almost immediately, if not with little trying. During the day, under the sun, definitely wouldn't. At that point, we replaced the battery, checked the starter, checked the ground cables, replaced the spark plugs, replaced the ignition start/ stop button.... nothing worked. So we turned to jump starting the car manually when I would go to work and leave home. Resulting great for a bit, not anymore. Car has been sitting since October and unable to use because even trying to jump start the car, it'll turn over but not turn on at all.

Any insights ?

 

Sometimes water gets in the car through the sunroof. Check the fuse box behind the passenger kick panel for water damage/corrosion. There is also the FRM on the other side, check it for water damage.

 

I have changed out the fuse box, didn't make a difference so we put the original back on it. I will check the FRM for any water damage as well!

 

Was the fuse box coded to the car? Of the same part number?

 

Not coded to the car, but it had same part number from same car. Would it make a difference that part being coded to the car ? I ended up putting the original one back into the car and just went on with jump starting the car until it stopped working completely in October.

 

Same model, S/base, and transmission? If so, coding may not be needed.

Is yours an S or base?

 

That is correct, but I can verify it once again. If not, then i'll see how to code it. Mine is Base model

 

May not be related, but did you check the mechanical aspects of the engine? Like compression, spark plugs, air filter, read fault codes...etc?

 

Its your cas module I had same problem