Hello,

I have 1999 BMW (that I do not think have the Harmon Kardon sound system). I heard that 2001 onwards, they came up with a subwoofer under the seat. I am getting that sub really cheap (65 bucks, 8 inch sub with inbuilt Hamon Kardon 2 channel amp). I have the following questions.

Does my car already have the wiring and maybe the sub? If not, will it fit my car?

How does it sound?

Thank you.
Take care.