[Salmon]

Try this, I think it should work.

pawn Код:

new player1carid = GetPlayerVehicleID(playerid);
new player2carid = GetPlayerVehicleID(playerid2); //Replace playerid2 with the id of player 2!
if (player1carid == player2carid)
{
  //They are in the same car! Do stuff here
}