diff --git a/selfdrive/car/toyota/values.py b/selfdrive/car/toyota/values.py
index dc3f9402c4..e8329153d3 100644
--- a/selfdrive/car/toyota/values.py
+++ b/selfdrive/car/toyota/values.py
@@ -264,6 +264,7 @@ FW_QUERY_CONFIG = FwQueryConfig(
     (Ecu.hybrid, 0x7d2, None),  # Hybrid Control Assembly & Computer
     (Ecu.srs, 0x780, None),     # SRS Airbag
     (Ecu.srs, 0x784, None),     # SRS Airbag 2
+    # Likely only exists on cars where EPB isn't standard (EPB is usually combined with ABS)
     (Ecu.epb, 0x750, 0x2c),     # Electronic Parking Brake
     (Ecu.gateway, 0x750, 0x5f),
     (Ecu.telematics, 0x750, 0xc7),