diff --git a/opendbc/car/docs_definitions.py b/opendbc/car/docs_definitions.py
index 75edf795c04..886311c121c 100644
--- a/opendbc/car/docs_definitions.py
+++ b/opendbc/car/docs_definitions.py
@@ -241,6 +241,8 @@ class CarDocs:
 
   # all the parts needed for the supported car
   car_parts: CarParts = field(default_factory=CarParts)
+  # Mazda requires comma power
+  requires_comma_power: bool = False
 
   merged: bool = True
   support_type: SupportType = SupportType.UPSTREAM
diff --git a/opendbc/car/mazda/values.py b/opendbc/car/mazda/values.py
index 80c3455a46d..20a6d7cc6f6 100644
--- a/opendbc/car/mazda/values.py
+++ b/opendbc/car/mazda/values.py
@@ -1,10 +1,10 @@
 from dataclasses import dataclass, field
-from enum import IntFlag
+from enum import Enum, IntFlag
 
 from opendbc.car import Bus, CarSpecs, DbcDict, PlatformConfig, Platforms
 from opendbc.car.common.conversions import Conversions as CV
 from opendbc.car.structs import CarParams
-from opendbc.car.docs_definitions import CarHarness, CarDocs, CarParts
+from opendbc.car.docs_definitions import CarFootnote, CarHarness, CarDocs, CarParts, Column
 from opendbc.car.fw_query_definitions import FwQueryConfig, Request, StdQueries
 
 Ecu = CarParams.Ecu
@@ -29,6 +29,14 @@ def __init__(self, CP):
 class MazdaCarDocs(CarDocs):
   package: str = "All"
   car_parts: CarParts = field(default_factory=CarParts.common([CarHarness.mazda]))
+  footnotes: list[Enum] = field(default_factory=lambda: [Footnote.COMMA_POWER_REQUIRED])
+  requires_comma_power: bool = True
+
+
+class Footnote(Enum):
+  COMMA_POWER_REQUIRED = CarFootnote(
+    "Mazda vehicles <b>require</b> comma power installation.",
+    Column.MAKE, setup_note=True)
 
 
 @dataclass(frozen=True, kw_only=True)