[Kostas']

It compiles without errors/warnings. I hope it works.

pawn Код:

#include <a_samp>

new
    engine, lights, alarm, doors, bonnet, boot, objective;
public OnGameModeInit()
{
    SetTimer("CarCheckTimer", 1000, true);
}
public OnVehicleDamageStatusUpdate(vehicleid, playerid)
{
    new
        Float:health;
    GetVehicleHealth(vehicleid, health);
    if(health < 250.0) {
        GetVehicleParamsEx(vehicleid, engine, lights, alarm, doors, bonnet, boot, objective);
        SetVehicleParamsEx(vehicleid, 0, 0, 0, doors, bonnet, boot, objective);
        SetVehicleHealth(vehicleid, 251.0);
        SendClientMessage(playerid, -1, "Your car is broken.");
        return 1;
    }
    return 1;
}
forward CarCheckTimer(playerid);
public CarCheckTimer(playerid)
{
    for(new i=0; i<MAX_VEHICLES; i++) {
        new
            Float:vhealth, veh;
        veh = GetPlayerVehicleID(playerid);
        GetVehicleHealth(veh, vhealth);
        if(vhealth < 250.0) {
            GetVehicleParamsEx(veh, engine, lights, alarm, doors, bonnet, boot, objective);
            SetVehicleParamsEx(veh, VEHICLE_PARAMS_OFF, lights, alarm, doors, bonnet, boot, objective);
            SetVehicleHealth(veh, 251.0);
            SendClientMessage(playerid, -1, "Your car is broken.");
            return 1;
        }
    }
    return 1;
}