Your MKV MK5 A90 Toyota Supra GR comes with an adaptive / adjustable suspension or damper system known as electronic dampening control. You'll most likely get a dash light (error) when you install any suspension component that replaces your factory shocks or struts. The TEIN Suspension Error Canceller Kit eliminates this error code so you can drive distraction free with your high performance aftermarket coilovers or shocks / struts.