The V2 controller (part #505) for 2016-2017 Surface 604 Rook and Colt eBikes. If your older Rook or Colt is showing signs of controller failure — error codes, inconsistent motor power, or no response to pedal input — this OEM replacement connects directly to the original wiring harness.
Controllers can degrade over years of use, especially in bikes that have been ridden in wet or humid conditions.
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