(vehicleid, &Float:health)
vehicleid The ID of the vehicle to get the health of.
&Float:health A float variable in which to store the vehicle's health, passed by reference
Full vehicle health is 1000, however higher values are possible and increase the health of the vehicle. For more information on health values, see here.
A vehicle catches on fire when its health is below 250. It will explode a few seconds later.
if(strcmp(cmdtext, "/repair", true) == 0)
{
new Float:health;
new veh = GetPlayerVehicleID(playerid);
GetVehicleHealth(veh, health);
if(health > 500) return SendClientMessage(playerid, COLOR_RED, "Vehicle doesn't need repairing!");
SetVehicleHealth(veh, 1000);
SendClientMessage(playerid, COLOR_GREEN, "Vehicle repaired!");
}The following functions may be useful, as they are related to this function in one way or another.