MB QUART BMW 4" Custom Fit Door Speakers for BMW 1 series E81 E82 E87 E88
MB QUART QMB-100X BMW 4" BMW 1 / 3 / 5 / E / F SERIES STRAIGHT FIT. BMW made it difficult to change the speaker to due to the three-hole screw fixing. MB Quart speaker requires NO cutting or modifying of the door panel to install.