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Add amplifier to 2010 base stereo?
I recently purchased a 2010 135i convertible with the base stereo system. I would like to keep the factory stereo look, so I have been checking out various plug and play options. Unless I am reading things wrong, it appears my only option to add a PnP amp is the BMW/Alpine option.
Does anyone have any other options I should check out?
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'18 VW Passat GT
'12 Volvo C70 T5 Inscription
'05 MINI Cooper S
'87 VW Cabriolet
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