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  1. Marc_250

    Bosch Error 504 With Speedbox 2

    Thanks for the response, I have since purchased a Speedbox '2.0' and have been running it for 3-4 hundred miles now and thought it had solved the problem assuming my old Speed box '2' was faulty or had been improved upon however just been out on a ride a same issue has occurred error 504 and...
  2. Marc_250

    Bosch Error 504 With Speedbox 2

    Hi, New to forum and I come seeking advice! Been running a Bosch Active Line Plus Gen 3 ebike with Speedbox 2 equipped. After 7000 enjoyable miles the drive unit completely failed (some sort of Electric error). The entire unit was replaced under warranty. Great.. Re-attached Speed Box and...
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