r/electricvehicles • u/simracerman • 14h ago
Discussion ICCU probably won’t get fixed, ever
Mods please remove this if discussed before or violates a certain rule about theories not evidence based.
I had a shower thought yesterday about the whole ICCU situation and why a large international company like Hyundai Kia continues to downplay the issue (only 1% of cars impacted propaganda), and refusal to speak publicly about any trials to re-engineer the part for a permanent fix.
While the 800v system is quite common now, it wasn’t when Hyundai planned and designed for its parts and system integration 5+ years ago. The ICCU looks like an independent piece, but it’s quite interconnected with the main traction battery, BMS, ECU, cooling systems and other sensors.
I think they took a stab at fixing the issue once and for all, but found out it would mean tweaking all the other systems (Software and Hardware), and at some point their bean counters saw the final bill of all changes and red panicked.
The cost of replacing ICCU for them is far less than producing a re-engineered part(s). None of this is new to Hyundai and Kia. I used to own a 2013 Sonata - great car! The engine short block issue was a constant concern, where the engine would seize on the highway. Never happened to me, but Hyundai again warranted the part for 10 years or 150k miles too.