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  1. R

    Bosch Error 504 With Speedbox 2

    I didn't update the bike or chip, no.
  2. R

    Bosch Error 504 With Speedbox 2

    Hi Georges, i have the 504 problem on my RS multicharger with speedchip 2. (bought in sep 2019) Is the speedchip 3 504error-proof? i read someone who had the problem with a speedchip 3 too? thanks!
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