diff --git a/selfdrive/car/fw_versions.py b/selfdrive/car/fw_versions.py
index 7493c33b7b..d143629afa 100755
--- a/selfdrive/car/fw_versions.py
+++ b/selfdrive/car/fw_versions.py
@@ -104,6 +104,8 @@ def match_fw_to_car_fuzzy(fw_versions_dict, config, log=True, exclude=None):
         elif candidate != candidates[0]:
           return set()
 
+  # Note that it is possible to match to a candidate without all its ECUs being present
+  # if there are enough matches. FIXME: parameterize this or require all ECUs to exist like exact matching
   if len(matched_ecus) >= config.fuzzy_min_match_count:
     if log:
       cloudlog.error(f"Fingerprinted {candidate} using fuzzy match. {len(matched_ecus)} matching ECUs")