Description BOSCH FIRMWARE UPDATE Compatible with the latest Bosch Drive Unit firmware version 19.54.0 that was released on May 4, 2026 as part of the major Performance Update 2.0 for the Bosch eBike Smart System. Suits Selected 2024/26 Models With Bosch Gen 4 Smart System with Magnet on RIM/VALVE Compatible with Performance Line CX Gen.4 (BDU374Y) Compatible with Purion 400/Purion 200/Kiox 300/Kiox 500/Intuvia 100. This new generation of Rim Magnet kits not only lets you unleash the full power of your ebike, but also introduces an innovative and very practical feature: you can choose whether to keep the unlocking active or deactivate it completely. Manage settings in a blink, even while you’re on move! Bosch CX Rim Magnet tuning mode The Eplus chip unlocks the speed up to 50 km/h for ebikes equipped with the Bosch Smart System motor in the Rim Magnet version (with the magnet on the rear wheel air valve). The Bosch motor product code* There are two ways to determine the motor code of your ebike: 1) In a diagnostic report, in the “Performance Line CX Drive Unit” section, look for the “Product code” entry. 2) Remove the cover and check the label on the motor to see which version is listed. 3) Look at the motor fixing screws: – Performance Line CX Gen.4 (BDU374Y) has three fixing screws – Performance Line CX Gen.5 (BDU384Y) has two fixing screws Technical features of Eplus tuning for Bosch CX Smart System Rim Magnet motor HARDWARE: kit with connectors, speed sensor, support and magnet. DEFAULT UNLOCK ACTIVATION KEY: ON / OFF see manual SPEED and KM DISPLAY ON THE DASHBOARD: reduced by half. APP AVAILABILITY: no. Compatible with e-bikes equipped with ABS Pro system ACTIVATION / DEACTIVATION OF THE SPEED UNLOCK ON THE E-BIKE When you turn on the ebike, a speed of approximately 25 km/h or 50 km/h will be displayed on the display or app; the accuracy of the speed depends on the circumference set in the motor, so it may vary slightly. If a speed of 25 km/h is displayed, it means that the unlocking is deactivated and the bike will work with motor assistance up to 25 km/h (original configuration). If a speed of 50 km/h is displayed, it means that the bike has been unlocked and the motor assistance will be active up to 50 km/h. To change the status of the unlocking (from active to inactive and vice versa), you must follow this procedure: - Turn on the ebike. - Check the speed shown on the display: 25 km/h unlocking inactive - 50 km/h unlocking active. - Immediately turn off the ebike as soon as the speed appears on the display. - Turn the ebike back on. - The displayed speed will be updated (if it was 25 km/h before, it will now be 50 km/h and vice versa). NOTE: The unlock status (active or inactive) will remain set to the last configuration chosen even when the ebike is turned on again. Warranty 24 months warranty. It fears humidity and heat sources. We are liable for manufacturing defects and not for incorrect installations. Any firmware update, previous modification with other systems, alteration or damage to the bicycle could result in the non-functioning of the product which can therefore neither be replaced nor refunded. Eplus guarantees that the product does not have any original conformity defects, pursuant to Legislative Decree 206/05. The function is guaranteed up to the latest version of the original motor; before updating the ebike check the compatibility specified on this page.           Installation Guide