If you’re here, you’re perfectly aware that your E91’s stock sound system isn’t gonna cut it for the long run. Even though for now it might be acceptable, with BimmerTech audio upgrades your 3 Series sound is going to get incomparably improved. And by improved, we mean more powerful, punchier, cleaner, more accurate and… adjusted to your musical taste.

Using DSP tuning, BimmerTech amplifier will arrive at your doorstep tailored to your E91’s size and your musical preferences. Before shipment, specify what music you like to put on while driving and whether you listen to it at moderate levels or much louder. We’ll tweak the audio settings to make it sound ‘yours’ straight from the beginning.

As for the available BMW E91 audio upgrades, the amount of speakers or whether you’ll be able to get an amplifier or not will vary depending on your original system. In the case of E91 they are: Base (Stereo), Hi-Fi (S676A), Top Hi-Fi(S677A), Harman Kardon (S688A) or Individual Audio System (S752A). To make sure which one you have, decode your VIN.

The install is an approachable project even for beginner DIY-ers. Nothing more than a plug & play process of disassembling and removing your factory E91 BMW speakers / amplifier, and fitting the new ones in. Everything is fully reversible.