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Puzzled... R&M Supercharger 2 , purchased Jan. 2020, now at 2680 miles. Kiox Software ver. 4.0.3.0 (updated in Aug. via Bosch eBike connect software on phone via Bluetooth connection. No issues for three months since). Keep getting Error 503 speed sensor fault, loss of speed indication, miles...

Lurking for a long time but am now stimulated to jump in. My Supercharger2 (2020) has had issues with the rubber flapper cover. It is POS. But the worst is when it completely comes off. Trying to get the back attachment tab reset in the charger cover plate is a major time suck. Been there...