A key localization system for finding a vehicle key, wherein the key localization system comprises: • a key unit connected to the vehicle key and configured for wireless communication; • a first communication unit (20a, 40) configured for receiving input indicative of a request to find the vehicle key and configured to establish wireless communication with the key unit; • at least one second communication unit (20b, 20c, 20d,..., 20n) comprised in a vehicle (2b, 2c, 2d,...,2n) and configured for wireless communication with the first communication unit (20a, 40) and the key unit; • a server configured for wireless communication with at least one of the first communication unit (20a, 40) and the at least one second communication unit (20b, 20c, 20d,..., 20n); and • a processing circuitry (102a, 102b, 102c) operatively connected to the first communication unit (20a, 40) and configured to cause the key localization system to: - receive at the server, a find key request signal (REQKEY), sent from the first communication unit (20a, 40), comprising key identification data and position information data; - send from the server a detect key signal configured to be received by at least one of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n); - send, via at least any of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n), a detect key signal configured to be received by the key unit; and - receive at the server, in response to that the key unit has received the detect key signal, a found key signal from the second communication unit (20b, 20c, 20d,..., 20n). • a key unit connected to the vehicle key and configured for wireless communication; • a first communication unit (20a, 40) configured for receiving input indicative of a request to find the vehicle key and configured to establish wireless communication with the key unit; • at least one second communication unit (20b, 20c, 20d,..., 20n) comprised in a vehicle (2b, 2c, 2d,...,2n) and configured for wireless communication with the first communication unit (20a, 40) and the key unit; • a server configured for wireless communication with at least one of the first communication unit (20a, 40) and the at least one second communication unit (20b, 20c, 20d,..., 20n); and • a processing circuitry (102a, 102b, 102c) operatively connected to the first communication unit (20a, 40) and configured to cause the key localization system to: - receive at the server, a find key request signal (REQKEY), sent from the first communication unit (20a, 40), comprising key identification data and position information data; - send from the server a detect key signal configured to be received by at least one of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n); - send, via at least any of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n), a detect key signal configured to be received by the key unit; and - receive at the server, in response to that the key unit has received the detect key signal, a found key signal from the second communication unit (20b, 20c, 20d,..., 20n). - receive at the server, a find key request signal (REQKEY), sent from the first communication unit (20a, 40), comprising key identification data and position information data; - send from the server a detect key signal configured to be received by at least one of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n); - send, via at least any of the first communication unit (20a, 40) and the second communication unit (20b, 20c, 20d,..., 20n), a detect key signal configured to be received by the key unit; and - receive at the server, in response to that the key unit has received the detect key signal, a found key signal from the second communication unit (20b, 20c, 20d,..., 20n).