Problems with Drive Motor Battery Pack (IMA) - 2018 Clarity Touring

seconded

New Member
Hi All,

Just wanted to relay my ongoing problems with my 2018 Honda Clarity as a warning for the rest of you. I was getting "Power System" and "Check Engine" warning lights on my dashboard last year (2025) and took it in to the dealer. The first time was in March where they just blamed it on the 12V battery and charged me to replace it in addition to a $250 diagnosis fee (sigh). This problem then happened again at the end of the year so I took it back to the dealer in the middle of December to have them dig further into the problem.

The dealer came back and said it was an issue with the IMA (part number given to me was 1D100-5WJ-A02). Luckily, the car is still under warranty so it should be covered by that. However, the part is backordered and won't be available until January 28, 2026 (!!) at the earliest. In the meantime, I have been in touch with my dealer and Honda corporate and both have pointed to (blamed?) each other as "responsible" for loaners or otherwise providing any assistance while I remain car-less for almost a month and counting.

Taking the car back is out of the question, I think, as the dealer's shop foreman has told the service advisor that it "doesn't feel that it's safe to drive. He thinks it my [sic] die on you if you were to keep driving it with the bad IMA battery." So that is my saga and hopefully this is a warning to my fellow owners of what might happen.

I'm disappointed in Honda, both in the reliability of this car (let's not talk about the AC problems or the fuel pump recall..), but also in the handling of my current problem. I understand that normally a loaner isn't provided unlike other car brands when a repair is going to take a day or even a week, I get it. But this will be at least a month if not two months without a car and the response from Honda has been tepid at best. Anyway... if anybody has any suggestions, definitely welcome to hear it!
 
You’ll probably have a better chance of success with the dealer rather than Honda Corporate. Depending of your mileage, when the car was first placed in service and the state in which you reside/ have the vehicle registered, the battery pack may or may not be covered under the Federal Emissions Warranty. If it is, it is bewildering to me why the dealer would not provide a loaner or rental vehicle to you while the car is out of service.
 
Thanks @Landshark - I did ask the dealer before reaching out to Honda Corporate and they already told me that they didn't offer loaners or rentals. (Back in the day, that dealer did provide them, but over the years they stopped it...) I'm in California if it makes a difference, but I don't think my situation falls under the Federal Emissions Warranty.
 
How is the 28th, just over two weeks from now, over a month? Aside from that, I hope they know better than to order this "IMA" part that the clarity didn't even actually use, nor does anything later than 2016. That part number at least is actually a 2018 Clarity battery.
 
How is the 28th, just over two weeks from now, over a month? Aside from that, I hope they know better than to order this "IMA" part that the clarity didn't even actually use, nor does anything later than 2016. That part number at least is actually a 2018 Clarity battery.
What @petteyg359 is saying is "IMA" was Honda's acronym for Integraged Motor Assist, which was Honda's original 1-motor hybrid drive system. The 2018 Clarity PHEV introduced Honda's newer Intelligent Multi-Mode Drive (i-MMD) 2-motor hybrid drive system.

Later, Honda renamed the i-MMD system "e:HEV." I believe Honda means for the first "e" to stand for "environnmental," but it might stand for "efficient."
 
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Hi @petteyg359 - thanks for reading and responding. I took the car to the dealer in the middle of December, which is why it's almost been a month now, and will be over a month by the 28th. And as for the "IMA" reference, I'm just passing along what the dealer told me as the problem. At least the part number that Honda Corporate gave me and I included in my original post tracks with the right part for my Clarity... hope that clarifies things.

[edit: added missing word "part"]
 
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