diff --git a/common/params_keys.h b/common/params_keys.h
index 4777ad1c7..98e48855e 100644
--- a/common/params_keys.h
+++ b/common/params_keys.h
@@ -141,4 +141,5 @@ inline static std::unordered_map<std::string, uint32_t> keys = {
     {"dp_device_auto_shutdown_in", PERSISTENT},
     {"dp_ui_radar_tracks", PERSISTENT},
     {"dp_toyota_door_auto_lock_unlock", PERSISTENT},
+    {"dp_toyota_tss1_sng", PERSISTENT},
 };
diff --git a/opendbc_repo/opendbc/car/structs.py b/opendbc_repo/opendbc/car/structs.py
index 58e8dd50c..b6dbefed0 100644
--- a/opendbc_repo/opendbc/car/structs.py
+++ b/opendbc_repo/opendbc/car/structs.py
@@ -23,4 +23,5 @@ class DPFlags:
   LateralALKA = 1
   ExtRadar = 2
   ToyotaDoorAutoLockUnlock = 2 ** 2
+  ToyotaTSS1SnG = 2 ** 3
   pass
diff --git a/opendbc_repo/opendbc/car/toyota/carcontroller.py b/opendbc_repo/opendbc/car/toyota/carcontroller.py
index a4e24cc07..d38db5bac 100644
--- a/opendbc_repo/opendbc/car/toyota/carcontroller.py
+++ b/opendbc_repo/opendbc/car/toyota/carcontroller.py
@@ -185,6 +185,9 @@ class CarController(CarControllerBase):
       # pcm entered standstill or it's disabled
       self.standstill_req = False
 
+    if (self.CP.flags & ToyotaFlags.TSS1_SNG.value) and CS.out.standstill and not self.last_standstill:
+      self.standstill_req = False
+
     self.last_standstill = CS.out.standstill
 
     # handle UI messages
diff --git a/opendbc_repo/opendbc/car/toyota/interface.py b/opendbc_repo/opendbc/car/toyota/interface.py
index 5ae1c6731..4865bec5d 100644
--- a/opendbc_repo/opendbc/car/toyota/interface.py
+++ b/opendbc_repo/opendbc/car/toyota/interface.py
@@ -154,6 +154,9 @@ class CarInterface(CarInterfaceBase):
     if dp_params & structs.DPFlags.ToyotaDoorAutoLockUnlock:
       ret.flags |= ToyotaFlags.DOOR_AUTO_LOCK_UNLOCK.value
 
+    if dp_params & structs.DPFlags.ToyotaTSS1SnG:
+      ret.flags |= ToyotaFlags.TSS1_SNG.value
+
     return ret
 
   @staticmethod
diff --git a/opendbc_repo/opendbc/car/toyota/values.py b/opendbc_repo/opendbc/car/toyota/values.py
index 361963069..1f0d73d34 100644
--- a/opendbc_repo/opendbc/car/toyota/values.py
+++ b/opendbc_repo/opendbc/car/toyota/values.py
@@ -78,6 +78,7 @@ class ToyotaFlags(IntFlag):
 
   ALKA = 2 ** 12
   DOOR_AUTO_LOCK_UNLOCK = 2 ** 13
+  TSS1_SNG = 2 ** 14
 
 class Footnote(Enum):
   CAMRY = CarFootnote(
diff --git a/selfdrive/car/card.py b/selfdrive/car/card.py
index 976e5c641..6b401ffb8 100755
--- a/selfdrive/car/card.py
+++ b/selfdrive/car/card.py
@@ -105,6 +105,9 @@ class Car:
       if self.params.get_bool("dp_toyota_door_auto_lock_unlock"):
         dp_params |= structs.DPFlags.ToyotaDoorAutoLockUnlock
 
+      if self.params.get_bool("dp_toyota_tss1_sng"):
+        dp_params |= structs.DPFlags.ToyotaTSS1SnG
+
       self.CI = get_car(*self.can_callbacks, obd_callback(self.params), experimental_long_allowed, num_pandas, dp_params, cached_params)
       self.RI = interfaces[self.CI.CP.carFingerprint].RadarInterface(self.CI.CP)
       self.CP = self.CI.CP
diff --git a/selfdrive/ui/qt/offroad/dp_panel.cc b/selfdrive/ui/qt/offroad/dp_panel.cc
index e5a05e0a8..2bd537164 100644
--- a/selfdrive/ui/qt/offroad/dp_panel.cc
+++ b/selfdrive/ui/qt/offroad/dp_panel.cc
@@ -12,6 +12,11 @@ void DPPanel::add_toyota_toggles() {
       tr("Enable Door Auto Lock/Unlock"),
       "",
     },
+    {
+      "dp_toyota_tss1_sng",
+      tr("Enable TSS1 SnG Mod"),
+      "",
+    },
   };
 
   QWidget *label = nullptr;
diff --git a/system/manager/manager.py b/system/manager/manager.py
index 7d8dac074..35a62f62b 100755
--- a/system/manager/manager.py
+++ b/system/manager/manager.py
@@ -63,6 +63,7 @@ def manager_init() -> None:
     ("dp_device_auto_shutdown_in", "-5"),
     ("dp_ui_radar_tracks", "0"),
     ("dp_toyota_door_auto_lock_unlock", "0"),
+    ("dp_toyota_tss1_sng", "0"),
   ]
 
   if params.get_bool("RecordFrontLock"):