Are vehicle mods available in gta 5 online?

Based on the information currently available, there is no confirmation that players can modify vehicles in GTA 5 Online. No official sources, patch notes, or community documentation have been cited to support the existence of such a feature. Consequently, the status of vehicle modifications in the online mode remains unverified. Until Rockstar Games releases an update or statement confirming this capability, users should not assume vehicle mods are available in GTA 5 Online.