I hear it sometimes after the car is turned off, I hear these popping noise from the rear driver tire area, I didnt listen to the passenger yet, but its a "thump!" noise about every 10-20 secs, is that normal? And sometimes when I go over speed bumps, I hear a "thump" also, is that normal too?

 

I think I noticed the same thing a couple of times now (just got the car last week). Seemed like the sound was coming from the rear of the car, near the exhaust. Little 'pop' sounds, ever 10-20 seconds, for a short while. Quite a 'thump', as you said. I got the distinct impression of moisture dripping onto a boiling hot surface. Both times I got out and went to the back to see what was going on. Saw and heard nothing.

 

That can be true were the moisture, but i hear it when theres no rain or if the car has not been washed.

 

Same here. Condensation from AC?

 

I get a thump or clunk sound now and then after I set my parking brake when my rotors have not cooled down enough that comes from the rear of the car. Where I live its very flat and do not set the hand brake much.

 

My guess it's something to to with the turbo cooling and releasing the heat out the tail . One cold morning mine was making smoke rings each time it popped .

 

my made the popping sound the other day. sounds litterally like. POP

 

I get the "thumping" sound too. Next time you hear it remove and reinstall your gas cap. I believe it is built up pressure that is "thumping" the vent in the gas tank. I also believe the vent is working because when I do remove the gas cap it does not release a gush of vapor. But after I remove and replace the gas cap the "thumping" goes away.

 

When idling, I also have the same sound from the rear in my mini cooper non-s. It is a low thumping sound, around 10 second interval.

 

Yes, there are other threads on this and the noise is caused by gas pressure being released in the fuel tank.

 

I think my MCSa has this noise! To me, it sounds like a groaning thump from near the rear passenger side. It sounded like a brake or wheel noise to me. I didn't notice until after I had filled the tank with gas for the first time. Mine will go on for quite a while, usually 5-10 min but, I've even heard it do it an hour or so after the car is parked. I was going to call the service dept and ask them about it. I will try the gas cap trick. My car is less than a month old.

 

Mini Farts!

 

i will try that, so, we all agree that this noise is normal and our mini's wont blow up while were driving?

 

YIKES! Who cut the cheese?

 

Is this noise worse when the gas tank is full or close to full? I'm down to 4 wedges and the noise is now gone. Anyone notice this?

 

Now that you mentioned it, I think you are right. I do notice the noise especially after recent fill-ups. I'll pay attention now.