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I have a Fortwo Cabrio Passion, 2008. It has been in storage for three years but I got it back about a year ago.
I had it checked out twice by dealerships and it was given a clean bill of health.
However, lately there has been a really strange noise. When turning it over there was what I can only describe as a deep base sound, almost like a reverberation in a speaker. It happened randomly and when I could not make it happen (it continued but randomly, seemed to be no set pattern to it) I decided it would not be worth taking it to a shop. Figured it would not happen when I was at the shop and they would think I was nuts.
Then, today, on the way home the noise came back. This time while I was driving. The radio is never used, I listen to audio books on my blu tooth ear plugs, but this was really loud. It scared me so I pulled over. It stopped. I turned the car off, back on and got back on the road. It came back but then went away. I was only about 3 miles from home so I went on home and parked the car. I turned it off and left it for a bit. Turned it back on and I get the loud thump when I turn the key and the ignition starts, but it goes away.
The car seems to run fine, no vibrations, no other issues. The brakes were recently done (after sitting for three years they needed a complete change out), back tires replaced and some other maintenance but nothing I can connect to this.

Any ideas? I am open to all suggestions.
 

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Discussion Starter · #3 ·
Thanks to Jo e Lafors!!! It was the subwoofer. One plug pulled out and the Strange Scary Noise is gone!!

Now I will sleep well tonight

THANK YOU
 
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