diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 7af4c57..2bdc185 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -467,6 +467,13 @@ void Human::RecalcSelfCollider()
     }
     self_collider_->pos = a8::Vec2();
     self_collider_->rad = meta->i->radius();
+    Buff* buff = GetBuffByEffectId(kBET_Car);
+    if (buff) {
+        MetaData::Equip* equip_meta = MetaMgr::Instance()->GetEquip(buff->meta->param4);
+        if (equip_meta && equip_meta->i->rad() > 1) {
+            self_collider_->rad = equip_meta->i->rad();
+        }
+    }
 }
 
 bool Human::IsCollisionInMapService()
@@ -1264,6 +1271,7 @@ void Human::DoGetDown()
         room->TakeOffCarObject(loot_uniid, GetPos());
         if (car_.meta->i->buffid()) {
             RemoveBuffById(car_.meta->i->buffid());
+            RecalcSelfCollider();
         }
         SyncAroundPlayers(__FILE__, __LINE__, __func__);
         room->NotifyUiUpdate();
@@ -2856,6 +2864,9 @@ void Human::ProcBuffEffect(Human* caster, Buff* buff)
     case kBET_Car:
         {
             RecalcBuffAttr();
+            if (buff->meta->i->buff_effect() == kBET_Car) {
+                RecalcSelfCollider();
+            }
         }
         break;
     case kBET_TurnOver: