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Has your car had an ICCU failure?

  • Yes.

    Votes: 38 27.0%
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    Votes: 103 73.0%
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ICCU Failure

12742 Views 232 Replies 46 Participants Last post by  Markypops
How many members have had an ICCU fail?
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Im here picking up now. The statement of work states battery was discharged while in accessory mode (as I suspected). Let’s hope I don’t get any more issues
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Im here picking up now. The statement of work states battery was discharged while in accessory mode (as I suspected). Let’s hope I don’t get any more issues
When i leave my car on, Bluelink sends me repeated messages that it is on. Did you receive any?
This thread makes me nervous! We do road trips from time to time and am beginning to question going with our ICE back up for trips. A recall seems appropriate. It would be in Hyundai’s interest if they want all of us to recommend and give positive reviews. Getting stuck hundreds of miles from home and no parts for months sucks. EV of the year? Not if it dies routinely.
Just today we returned from a 900 mile trip in our Ioniq 5. Based on this thread, and others like it, the possibility of a ICCU failure was never very far from my thoughts. Especially since we purchased the car 1 1/4 years ago and it rolled over 20,000 miles on the trip and those numbers seem to be in the range where people have reported the problem occurring.

We will be taking a longer trip in a couple of months, into a place far from cellphone coverage and with charging stations spaced at the limit of the car's range (at least how I drive it). Those are enough worries. I would rather not have the potential for a ICCU failure adding to the concerns for that trip.

It sure would be nice to have peace of mind knowing either what triggers the fault or that a recall has fixed the cause.
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How Hyundai seems to be handling this issue is really souring my opinion of the company to be honest.

If I'm driving a car with a ticking time bomb under my rear seat, I would greatly appreciate the company be a little more proactive and effect a recall.
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How Hyundai seems to be handling this issue is really souring my opinion of the company to be honest.

If I'm driving a car with a ticking time bomb under my rear seat, I would greatly appreciate the company be a little more proactive and effect a recall.
My car is in the dealers again 53 days after the ICCU replacement, with the Red 12V stop safely message.
I am seriously considering another make of car.
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When i leave my car on, Bluelink sends me repeated messages that it is on. Did you receive any?
the car wasnt on though, it was in accessory mode. I received the notifications the next day (while they were charging the 12v presumably that the vehicle has been on for an hour)
My car is in the dealers again 53 days after the ICCU replacement, with the Red 12V stop safely message.
I am seriously considering another make of car.
That's pretty crappy. Hyundai really needs to make this right.

I originally wanted a Tesla. Time will tell if I regret my choice.
:mad::mad:
That's pretty crappy. Hyundai really needs to make this right.

I originally wanted a Tesla. Time will tell if I regret my choice.
My Ioniq 5 cost Tesla money but because my nearest showroom was almost 200 miles away I went with a manufacturer with a dealer 15 miles away. Knowing what I know now, I must have been mad:eek:
Got the call from the dealer. 12 days after I turned it in, they finally diagnosed it. "Iccu failure". So Hyundai now owes me for 12 days of car rental, I have heard it is pretty difficult to actually collect, that rather than having a smooth efficient written process they have a "case manager" who will "call you later".

Anyways they have 18 days to get the iccu in stock and get my vehicle roadworthy or I am going to make a lemon law claim and get a Tesla.
Got the call from the dealer. 12 days after I turned it in, they finally diagnosed it. "Iccu failure". So Hyundai now owes me for 12 days of car rental, I have heard it is pretty difficult to actually collect, that rather than having a smooth efficient written process they have a "case manager" who will "call you later".

Anyways they have 18 days to get the iccu in stock and get my vehicle roadworthy or I am going to make a lemon law claim and get a Tesla.
Hope they can fix your car quickly, but 18 days sounds like a reach given recent reports on this thread. :(
Hope they can fix your car quickly, but 18 days sounds like a reach given recent reports on this thread. :(
The dealership said 4-6 weeks. I emailed a lemon lawyer from the state I bought I from and verified it would be eligible.

It's less than 2 years old, under 24k miles, bought new in that state. Just needs to take longer than 30 days to get fixed.

The lawyer recommended I not mention my intent to pursue the claim to Hyundai since they could expedite the repair if I did so.

Failing to stock the replacement iccu, or it seems in this thread, failure to fix the defect causing it to fail, is what makes it a lemon. Hyundai's wrongdoing is their failure to keep a stockpile of this frequently failing part/ship it by air.

Basically the net result is at the end of the lemon claim I get all my money back, minus 2500 for the mileage and maybe interest (at about 2 percent so about 1k). That zeroes the loan and leaves me with about 10kish to put towards the Tesla.

Financially it's a no brainer.
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Sent this to customer service just now:

Hello

I own a 2022 Ioniq 5. I love the car however I am greatly concerned about the ongoing ICCU failures.

I am a member of Hyundai forums and there are numerous reports of the ICCU failing on all three 2022 EGMP platform vehicles.

According to those who have experienced the failure, the repair is taking an inordinate amount of time due to dealership ineptitude and lack of replacement parts.

My own vehicle is starting to exhibit signs that my ICCU will fail sometime in the near future.

I don't wish to wait months for my vehicle to be fixed. I am starting to experience serious buyer's remorse and I also feel that Hyundai's silence on this issue is seriously hurting their brand reputation.

Why doesn't Hyundai mitigate this issue now and affect a recall?

Please don't respond with a standard canned answer. I would appreciate a serious reply indicating that something is being done.

I paid a lot of money for my first-ever Hyundai product and I expect that I would be treated as a valued customer.

"Me"
Charlottetown PE.

I'll see if they give a ---- when they respond a few weeks from now.
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Sent this to customer service just now:

Hello

I own a 2022 Ioniq 5. I love the car however, I am greatly concerned about the ongoing ICCU failures.

I am a member of Hyundai forums and there are numerous reports of the ICCU failing on all three 2022 EGMP platform vehicles and the repair taking an inordinate amount of time to fix due to dealership ineptitude and lack of replacment parts.

My own car is starting to exibit signs that my ICCU will fail sometime in the near future.

I don't wish to wait months for my vehicle to be fixed. I am starting to feel serious buyer's remorse and I feel that Hyundai's silence on this issue is seriously hurting their brand reputation.

Why dosen't Hyundai mitigate this issue now and affect a recall?

Please don't respond with a standard canned answer. I would appreciate a serious reply indicating that something is being done.

I paid a lot of money for my first-ever Hyundai product and I expect that I would be treated as a valued customer.

"Me"
Charlottetown PE.

I'll see if they give a ---- when they respond a few weeks from now.
Well said, their credibility now (in my eyes) is non-existent.
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I emailed Hyundai Canada's director of customer experience and aftersales today. We'll see if he responds.
Sent this to customer service just now:

Hello

I own a 2022 Ioniq 5. I love the car however I am greatly concerned about the ongoing ICCU failures.

I am a member of Hyundai forums and there are numerous reports of the ICCU failing on all three 2022 EGMP platform vehicles.

According to those who have experienced the failure, the repair is taking an inordinate amount of time due to dealership ineptitude and lack of replacement parts.

My own vehicle is starting to exhibit signs that my ICCU will fail sometime in the near future.

I don't wish to wait months for my vehicle to be fixed. I am starting to experience serious buyer's remorse and I also feel that Hyundai's silence on this issue is seriously hurting their brand reputation.

Why doesn't Hyundai mitigate this issue now and affect a recall?

Please don't respond with a standard canned answer. I would appreciate a serious reply indicating that something is being done.

I paid a lot of money for my first-ever Hyundai product and I expect that I would be treated as a valued customer.

"Me"
Charlottetown PE.

I'll see if they give a ---- when they respond a few weeks from now.
I understand the overall concern on the ICCU issue. I saw you thread that you believe the Amber 12v light is more frequent but is that indicator ICCU failure? Unless I missed a lot I’m the posts here and various other forums, i had not seen any conclusions for an indication of pending failure. Most posts indicate nothing then while driving they get the charge warning.
I understand the overall concern on the ICCU issue. I saw you thread that you believe the Amber 12v light is more frequent but is that indicator ICCU failure? Unless I missed a lot I’m the posts here and various other forums, i had not seen any conclusions for an indication of pending failure. Most posts indicate nothing then while driving they get the charge warning.
Man if it is I'm shocked mine hasn't failed. I see that light more often than not on my 1.5 year old IONIQ5.
I understand the overall concern on the ICCU issue. I saw you thread that you believe the Amber 12v light is more frequent but is that indicator ICCU failure? Unless I missed a lot I’m the posts here and various other forums, i had not seen any conclusions for an indication of pending failure. Most posts indicate nothing then while driving they get the charge warning.
This is the post where I expressed my concern.

I hooked up a BM2 a few days ago and my 12v was very low. I don't use third-party apps that connect to the car, I never use Bluelink and I have no accessories that are powered with the car off.

There is no reason for such a low battery that I can see.

I'm no engineer but I assume that when the ICCU fails without warning, the 12v eventually dies and will not accept a charge any more. You're out driving and the car tries to send power to the battery, and that blows the fuse resulting in a dead car.
This is the post where I expressed my concern.

I hooked up a BM2 a few days ago and my 12v was very low. I don't use third-party apps that connect to the car, I never use Bluelink and I have no accessories that are powered with the car off.

There is no reason for such a low battery that I can see.

I'm no engineer but I assume that when the ICCU fails without warning, the 12v eventually dies and will not accept a charge any more. You're out driving and the car tries to send power to the battery, and that blows the fuse resulting in a dead car.
Hooking aftermarket BM2 is interfering with onboard DC-DC converter to measure 12V battery internall resistance correctly...this tool should not be connected for extended periods of time.
Factory scanner has ability to see history on any aftermarket hardware that is feeding from 12V battery.
So you are slowly killing your 12v battery SOH with this device attached.
Hooking aftermarket BM2 is interfering with onboard DC-DC converter to measure 12V battery internall resistance correctly...this tool should not be connected for extended periods of time.
Factory scanner has ability to see history on any aftermarket hardware that is feeding from 12V battery.
So you are slowly killing your 12v battery SOH with this device attached.
It's only been connected a few days. I'm going to remove it tomorrow.
The BM2 battery monitor is considered harmless to the 12v battery with minuscule 1 mA drain, but maybe it has bigger impact on the measured impedance or other parameters of the 12v battery? Someone should use it for a month then hook up the GDS official diagnostic software:
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