Can't say for sure as I do not know what changes were made for the 2 series, but on older BMWs with seat subs, it took a dremel to flatten some ridges on the holder and a foam gasket. There is an install video on youtube.
Biggest issue is that the system is probably 4 ohm and the earthquakes are 2 ohm. Mismatch will likely kill amp. Therefore a small amp for the subs would be better.
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Previous BMW: 16 M4, 13 M6; 14 M235i, 12 BMW M3; 11 BMW M3; 08 BMW M3; 08 BMW Z4M; 04 X3; 02 M3 Convertible; 02 M3; 00 M Roadster; 94 325 convertible; 92 325i Convertible; and 85 635csi
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