A vehicle computer can be programmed to detect, in a vehicle, one of a plurality of variations, based on data received from one or more vehicle sensors or a vehicle interface, to transmit, to a remote computer, variation data including the detected variation and a version of software in the vehicle computer, wherein the variation data identifies the detected variation and the version of the software, to receive, from the remote computer, a response including that a software update is identified based on the detected variation, and upon identifying the software update, to download and install the software update in the vehicle computer.