501 12 26-02 - Joystick Kit Collision sensors are made up of two components: a joystick and an electronic board. If your Automower displays the error message collision sensor active, there are usually three possible causes: The bodywork is not properly secured. The joystick has lost its magnet. The electronic board is defective. In case of problems with the active collision sensors, always check points 1 and 2 first. If the bodywork is correctly secured and the joystick magnets are in place, it is very likely that the collision sensor electronic board is faulty. replaced by 577 52 59-01/579 24 88-01/501 12 26-01 Fits: Automower 220 AC, 2012-2015 Automower 230 ACX, 2012-2015 Automower 260 ACX, 2011 Automower 265 ACX, 2012-2015 Automower 320, 2013-2015 Automower 330X, 2013-2015 Automower 420, 2016 -> Automower 430X, 2016 -> Automower 440, 2017 > Automower 450X, 2016 -> Automower 520, 2018 -> Automower 550, 2018 -> SOLAR HYBRID, 2012-2014 Gardena R160, 2013-2015