She's def hard on the brakes! I just had my 10k service done on my 22 45e and they stated I had 10/32's left, meaning basically only 20% worn. While the 45e is heavier than the 50i, the regen brakes help a lot . . . I have m Sport and tow pack, so I think the rotors and pads are slightly bigger than those that don't; but the 50i likely uses the same larger ones I'd think.
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