diff --git a/selfdrive/car/data_structures.py b/selfdrive/car/data_structures.py
new file mode 100644
index 0000000000..77ec98d055
--- /dev/null
+++ b/selfdrive/car/data_structures.py
@@ -0,0 +1,34 @@
+from enum import StrEnum, auto
+
+
+class Ecu(StrEnum):
+  eps = auto()
+  abs = auto()
+  fwdRadar = auto()
+  fwdCamera = auto()
+  engine = auto()
+  unknown = auto()
+  transmission = auto()  # Transmission Control Module
+  hybrid = auto()  # hybrid control unit, e.g. Chrysler's HCP, Honda's IMA Control Unit, Toyota's hybrid control computer
+  srs = auto()  # airbag
+  gateway = auto()  # can gateway
+  hud = auto()  # heads up display
+  combinationMeter = auto()  # instrument cluster
+  electricBrakeBooster = auto()
+  shiftByWire = auto()
+  adas = auto()
+  cornerRadar = auto()
+  hvac = auto()
+  parkingAdas = auto()  # parking assist system ECU, e.g. Toyota's IPAS, Hyundai's RSPA, etc.
+  epb = auto()  # electronic parking brake
+  telematics = auto()
+  body = auto()  # body control module
+
+  # Toyota only
+  dsu = auto()
+
+  # Honda only
+  vsa = auto()  # Vehicle Stability Assist
+  programmedFuelInjection = auto()
+
+  debug = auto()
diff --git a/selfdrive/car/toyota/values.py b/selfdrive/car/toyota/values.py
index ca422c73ef..74fbd69939 100644
--- a/selfdrive/car/toyota/values.py
+++ b/selfdrive/car/toyota/values.py
@@ -3,13 +3,12 @@ from collections import defaultdict
 from dataclasses import dataclass, field
 from enum import Enum, IntFlag
 
-from cereal import car
 from openpilot.selfdrive.car import CarSpecs, PlatformConfig, Platforms, AngleRateLimit, dbc_dict
+from openpilot.selfdrive.car.data_structures import Ecu
 from openpilot.selfdrive.car.conversions import Conversions as CV
 from openpilot.selfdrive.car.docs_definitions import CarFootnote, CarDocs, Column, CarParts, CarHarness
 from openpilot.selfdrive.car.fw_query_definitions import FwQueryConfig, Request, StdQueries
 
-Ecu = car.CarParams.Ecu
 MIN_ACC_SPEED = 19. * CV.MPH_TO_MS
 PEDAL_TRANSITION = 10. * CV.MPH_TO_MS