File:BMW 523i Touring M Sport E61 (5676683384).jpg - Wikimedia Commons
BMW Heaven Specification Database | Specifications for BMW 523i E60 M LCI Sedan (2007-2010)
File:BMW 523i Touring M Sport E61 (5676683390).jpg - Wikimedia Commons
Amazon.com: MCARCAR KIT Carbon Fiber Trunk Spoiler Fits for BMW 5 Series E60 M5 Sedan 2004-2010 Factory Outlet CF 520i 523i 525i 528i 530i 535i 540i 545i 550i M Sport Car Rear