Okai ES-series "rental type" scooters are designed for fleet use with higher utilization, rugged frames, and service-friendly components (often including swappable batteries). In a repair-vs-replace context, you should treat this like commercial equipment: preventive maintenance and targeted module swaps are normal, and repairs are often economical when they restore uptime.
Prioritize safety-related systems (brakes, steering/fork, wheel/tire condition) and the fleet battery interface, since those can create reliability issues if worn. If the scooter is still within its expected service life, repairing under the threshold is usually sensible-especially when the fix is a known fleet part (battery dock, controller, brake assembly).
Replacement becomes more attractive when frame integrity is compromised or the unit has repeated electrical failures across multiple modules. Pricing referenced from a current ES600 fleet-scooter retail listing; lifespan context references published shared-scooter longevity reporting.