Leaderboard

In 7 years of owning this car I've never had the 12V drain problem before so I am thinking maybe I'm just not driving the car often enough. Will keep an eye on it.

Some of the cmaxes are known to have a parasitic draw on the 12V battery; usually a software update/change fixes it (earlier models are more plagued, but even 2017s; there might be a tsb for it, but it's known within the dealer-help lines). Generally, driving-to-recharge a battery usually takes driving the vehicle (with ICE) for around 20 minutes at or above 40mph. Greg

Hi all, 120k on mine and I must have replaced it 4-5x already. the first couple times were a real struggle.... Finally figured out the easy way (no, not the dealer). Once you remove the fuzzy under dash cover, and the glovebox to make things easy to see (for my old calcified back..), there are two large blue electrical connectors on the fuse panel. There's a locking pin on them and once pressed, you can rotate the handle on the connector, which pushes the connector out of the panel. Remove those connectors and gently push them out of the way. Now you have a clear, straight shot to remove the old and install the new filter. As for the comment on the entertainment system, it's a good idea to pull that fuse, attach a strong piece of tape to it, and reinstall. So when/if the system goes nutty, you can more easily pull the fuse to kill it and then reinstall it later when you have time and better visibility. Last time I pulled it (years ago) it was on max volume and would not shut off (but that was before v3.8 was installed...still good to be prepared while your there)