(A) in the image is the sensor.



If the black cover is (A); yes, part of the sensor was broken.

 

Years ago, the battery sensor on your model year was part of a recall due to moisture intrusion.

https://hondanews.com/en-US/releases...-accord?page=1

 

Yes I remember getting that recall taken care of.

 

Attached is a picture of the negative terminal. What do you think?

 

Hard to tell from the photo. If it was cracked or broken, for myself, I would replace it for piece of mind. The part is not that expensive and is a quick replacement.

 

I would have to get this part from the dealer, I suspect. About how much? Is this something I could replace myself?

 

Honda list price is around $40. It is a dealer part. There are online Honda dealers that sell for less than list price; but, shipping costs will probably nullify the price difference. You can use Honda e-store and check on-line if a local dealer near you might sell for less than list price and pick up the part there.

Honda Part No.:38920-T2A-A04

You can replace it yourself. A 10mm socket and ratchet or wrench is the only tool needed. The image I previously posted shows the two nuts that are loosened/removed.

(Refer to image I previously post.)
Removal:
1. Make sure the ignition switch is in LOCK (0), or the vehicle ignition in the OFF mode.

2. Disconnect the battery sensor connector.

3. Remove the battery sensor (A) from the battery.

4. Disconnect the negative terminal (B) from the battery sensor.

NOTE: To protect the battery sensor connector (C) from damage, do not hold it when removing the negative terminal.

Install:
1. Install the negative terminal (B) on the battery sensor (A).

NOTE:
Make sure the areas between the negative terminal and the battery sensor are clean.
To protect the battery sensor connector (C) from damage, do not hold it when installing the negative terminal.



2. Install the battery sensor to the battery.

3. Connect the battery sensor connector.

 

Thank you for the detailed response. I have examined the battery sensor with a lighted magnifying glass and it looks totally intact. I could not discern any jagged imperfections that might occur if a cover had broken off. In the picture provided previously, I don't see a battery post cover anywhere. It looks exactly like mine does now.