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BMW 5 Series E39 1995 - 2003 13cm Car Front and Rear Speaker Upgrade Kit | eBay
BMW Speaker Upgrade/Installation | 5 Series (E39) 1999-2005 | BAVSOUND Stage One | Part 1 - YouTube
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Speaker Installation Kit Compatible with BMW 5 Series E39 Touring Sedan Front Ground Zero GZIF 52X Speaker Coaxial 4 Ohm 13 cm : Amazon.de: Electronics & Photo