Amazon.com: for BMW (2005-2012 E90 E91)(2010-2014 E84), Car Door Panel Loud- Speaker Cover Grille Trim 3' X1 318 320 325i, Aftermarket Replacement for 51417144559 : Automotive
Logic 7 speaker setup E90 and E91 - BMW 3-Series (E90 E92) Forum
MATCH UP C42BMW-FRT.1 Component Speaker Upgrade - BMW E91 3-Series Touring 05-11
Audison Front, Rear Speakers, Amplifiers, and Subwoofers Bundle Compatible With 05-12 BMW 3 Series Touring E91 Base Sound System - Creative Audio