BMW E87 Subwoofer Upgrade / Car Hifi Einbauservice CSP Nürburgring
Audison Front, Rear Speakers, and Subwoofers Bundle Compatible With 04-11 BMW 1 Series 5 Door E87 Base Sound System - Creative Audio
AMPIRE 20cm Bass Speaker for BMW | Compo Speakers | Ampire | Product Archive
PG Audio BM-4, 10 cm coaxial loudspeaker suitable for BMW 1 Series (E81, E82, E87, E88), 3 Series (E90, E91, E92) 5 Series (E60, E61), X1 (E84)1 pair | Fruugo NO