A7.308 vs UNARMORED VEHICLES: All non-ordnance Direct Fire attacks vs unarmored vehicles/horse counters are resolved on the Vehicle line of the IFT using the same IFT DR (after any applicable modification) for any Personnel target in the same Location. Unless using Defensive First Fire, non-ordnance attacks vs unarmored vehicles/horses affect all occupants of the Target Location including Infantry and other vehicles/horses which are present in the same Location [EXC: a vehicle in Bypass and out of the firer's LOS cannot be affected, nor can more vehicle/horse counters be affected by a DR than the highest KIA# of that column as randomly determined (e.g., a 6, 8 or 12 FP attack vs the Vehicle Line could affect no more than three vehicles; a 2 or 4 FP attack could affect only two vehicles; a 1 FP attack could affect only one vehicle)]. If that Final DR is < the Kill Number listed for the IFT FP column used, the vehicle is eliminated [EXC: Unlikely Kill; 7.309]; if it equals the Kill Number, the vehicle is immobilized [EXC: if HD the vehicle is unaffected by an Immobilization result]; if the Final DR is ≤ half of the Kill Number, the vehicle is eliminated as a burning wreck and all of its PRC are eliminated. Otherwise, the PRC of an eliminated vehicle must check for survival (D5.6). The surviving PRC of an eliminated vehicle are not subject to further effects from that attack. However, the Vulnerable PRC of a vehicle that has not been eliminated may still be subject to a Collateral Attack (D.8).
So if the final DR is higher than the star number, there is no effect.