Facelift Model: Will the ECCU issue be fixed?

Has anyone heard if the facelift models will still have the ECCU problems? The dealers I talked to said it won’t be an issue, but I’m guessing they’re just trying to make a sale.

(Whoops, I couldn’t change ECCU to ICCU in the title, but you get what I mean)

The dealer’s probably not being honest. The truth is no one really knows. We’ll have to wait and see.

Just to add, someone posted that their new 2025 Ioniq 5 (NACS port) had the ICCU fail only weeks after they got it.

This one even had the updated P/N# for the ICCU.

It could be a rare case, but it’s something to think about with the 2025 EV6 coming out soon.

@Johnstone
That makes you wonder why Hyundai/Kia are still doing recalls for the ICCU at all if even the newer ones are having issues. Why not just stop the recall and only fix the cars that actually break?

All car makers have their occasional 12V battery issues. It’s a leftover problem from the ICE days.

Nathan said:
All car makers have their occasional 12V battery issues. It’s a leftover problem from the ICE days.

The 12V and ICCU are different parts. They do interact, but you could have an ICCU problem with a good 12V, or vice versa.

@Sadie
Yeah, but it’s unrealistic to think that other brands don’t have similar problems.

We don’t really know yet, but it’s unlikely this will fully fix the issue. The 12V system has been a constant problem across every brand’s EVs. On the bright side, they’re still a lot more reliable than gas cars.

@Tracy
How are they more reliable than gas cars though?

pepelar said:
@Tracy
How are they more reliable than gas cars though?

Electric cars have a lot fewer parts that can break. I’ve had my EVs for years and only had a handful of issues. My gas cars though? Last weekend I replaced spark plugs and coils on one – took more work than any maintenance I’ve done on my EVs.

@Tracy
I get it now. We’ve always had Honda Civics, and they barely need anything. Great mileage (32 city, 40 highway with a manual). We’d still have ours if not for an accident. We had 18 trouble-free years with it. So when I think of ‘reliable,’ I think about a car that runs for years without much maintenance. Since EVs are new and have software updates, it’s hard for me to see them as reliable. I’ve read people posting about their EVs breaking down on highways, and Consumer Reports doesn’t recommend the 2025 model. I don’t want to take the risk of having the car die on me while driving. Could you help me see it differently?

My girlfriend who drives a Sportage doesn’t like Kia because her car’s always in the shop for software issues. I want an EV, but I want one that doesn’t give me headaches or need frequent trips to the mechanic. Maybe I’m just not into the whole software thing. I’ve been researching for months but can’t find an EV I trust at a decent price. The reliability ratings for EVs seem concerning.

I’m here reading because we test drove a couple of EV6s, and it was fun, but I can’t commit to buying one yet.

@pepelar
People post about the 12V or ICCU issues because those are the only major problems many face. It’s rare, affecting less than 1% of EV6 owners. Get the recall done, and most will be fine. You won’t find a 2024/2025 car that lasts like a Civic. Those things were built to last, but newer engines are much more efficient, which means more compression and less long-term durability. Initially, the EV6 had a higher reliability rating than the Honda Civic, and now it’s just a few points behind it after accounting for the electrical issues.

@Tracy
Yep, those Civics were built to last longer than any of us. The manual had better mileage than most hybrids. If I can find an EV6 at a good price, maybe I’ll consider it. I also like the Ioniq 5 (I like sitting higher in it). They’re fun cars at a reasonable price, especially since we haven’t bought from the brands we’re avoiding lately.

@Tracy
Every brand? I just replaced the original battery in my 8-year-old Volt.

terryann said:
@Tracy
Every brand? I just replaced the original battery in my 8-year-old Volt.

The Bolt and Volt have had similar issues. The US even launched an investigation into the BECM, and GM has a service bulletin for it. You were lucky, but as I said, this happens with every brand.

@Tracy
The BECM issue isn’t related to the 12V issue.

terryann said:
@Tracy
The BECM issue isn’t related to the 12V issue.

It can definitely cause a 12V issue, since the BECM and ICCU failures are very similar. It just depends on how the unit fails.

Yes, no, maybe. If you’re buying new, I’d just spend the extra $400 for the ohmmu for peace of mind.

KiaDiva said:
Yes, no, maybe. If you’re buying new, I’d just spend the extra $400 for the ohmmu for peace of mind.

The 12V battery and ICCU are separate. Getting the ohmmu 12V won’t help the ICCU.

Also, after a teardown of ohmmu batteries, they found poor build quality. I’d stick with AGM from Costco.

@Sadie
Lithium batteries are better for full cycle discharges, which is what the ICCU charging system needs. So at least it reduces the chances of the 12V dying from regular wear.