Hello and TIA..... I have a parasitic battery drain on my 2016 RDX. Thinking it was just an old battery, I replaced the battery two weeks ago. Obviously this is an ongoing problem with Honda products - my former 2006 MDX had the same problem and it was the HFL unit. I can't find any information on the location of the HFL unit in the 2016 RDX - can anyone help? The battery is draining at about 0.1 V per hour. Of interest, after replacing the battery I am also unable to activate the remote start, or the "beep" when I lock the doors . Although the Settings are indicating "on" for both features, they are not working - - other FOB functions are working. I've confirmed with both remotes. I thought I could disconnected the HFL unit to see if that was the problem, and if not, I would move on to see if the AC clutch is the problem, or then the stereo amplifier. Honda service is far too busy installing winter tires and the wait time for an appointment is over two weeks away. THanks.

 

UPDATE: I found the unit - under the glove box behind the outside right kick panel. Now unplugged and I will see if the battery drain still occurs. If not, problem solved.

 

Replaced HFL unit and AC relay - problem solved. Thanks bros.