- BMW 3/ 5/ 7 Series X1 X3 X4 X5 X6 X7 Audio Sound System Upgrade Bowers & Wilkins LED Speaker Luminous Horn Cover Trim Ambient Light Retrofit$279.99• SKU: BSUL. OEM Design, plug and play, NO need cut any wires. • Better sound quality similar with original Bowers & Wilkins speakers ... Learn More