The Fanatec ClubSport Shifter SQ V1.5 is a metal H-pattern/sequential shifter where missed shifts often trace back to internal sensors, switches, or mechanical detents rather than "software." If you're getting incorrect gears or no gear engagement, inspect the USB adapter/cable, then consider sensor alignment and switch wear. Because the mechanism is serviceable, a repair can be worthwhile if you can replace sensors or restore alignment under the threshold-especially since the shifter body is typically durable.
Replacement becomes more attractive if the shifter has extensive mechanical wear (sloppy gates, broken detents) plus sensor failures that keep returning after service. For decision-making, weigh how much troubleshooting time you're willing to spend versus the reliability you need for competitive sessions.
Pricing referenced from Fanatec US add-ons listings for the ClubSport Shifter SQ.