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  1. 2nd Gen. 1&2 Series (2011-2021 | F20,F21,F22,F23)
    I had a new chain and battery fitted around 4 months a go to my F20. Prior to that, I upgraded the head unit, had it coded and replaced the NBT emulator. Since then, with the exception of the front passenger speaker intermittently not working, it's been absolutely fine. Went out this evening...
  2. 1st Gen. 1 Series (2004-2013 | E81, E82, E87, E88)
    Hi all, I am looking into upgrading the audio in my E87 with base audio. My goal is to swap the four 4-inch speakers with good aftermarket ones and to get the most out of them I want to swap the Business HU with an aftermarket 1-DIN head unit (doesn't matter too much which one). My car has a...
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