Updating your bike's software with a 'Tuning Dongle Kit for Bosch eBikes' fitted will cause errors in the software which will require a dealer visit to rectify (its not terminal, but it is frustrating for owners!). Importance notice for Smart System equipped bike owners: The new Bosch Smart System allows now allows owners to carry out their own Bosch ebike software updates via the new Bosch eBike Flow app. The dongle kit is activated/deactivated using the 'WALK' button on the handlebar controls. This single product page covers tuning kits for all Bosch motor systems, including Bosch Active, Bosch Active Line, Bosch Active Line Plus, Bosch Cargo Line, Bosch Performance Line (Generation 3) and Bosch Performance Line CX (Generation 4) motors including the new 2022-onwards Bosch Smart System. Our Bosch Tuning (de-restriction) Kits remove the 15mph assistance cut-off on all Bosch powered eBikes. PLEASE NOTE: UNLESS INSTRUCTED BY US, IF YOU PLACE AN ORDER FOR THIS PART AND IT'S NOT ACCOMPANIED BY A BOSCH DRIVEN BIKE IN THE SAME ORDER/BASKET, THE ORDER WILL NOT BE FULFILLED AND YOU WILL RECEIVE A REFUND WITHIN 48 HOURS, MINUS AN ADMINISTRATION CHARGE. We do not supply, fit or ship this product for bikes purchased from other dealers. This product is exclusively available to customers who purchase their bike(s) directly from E-Bikeshop.