A first vehicle includes a wireless transceiver; and a processor programmed to responsive to encountering a second vehicle, establish a wireless connection to the second vehicle via the wireless transceiver and obtain a vehicle identification of the second vehicle, identify a software update for a controller of the second vehicle using the vehicle identification, wherein the software update is incompatible with the vehicle, responsive to connecting to a predefined wireless network, download the software update into a local storage, and responsive to reencountering the second vehicle, reconnect to the second vehicle via the wireless transceiver and transmit the software update to the second vehicle.