The update in this case was software. It reduces the charging rate and runs fans during charging to lower the temperature the ICCU has to endure. I bought my car in early 2025 with the update in place and never ran the ICCU at the older, higher temperature. I suspect that a fix like that wouldn’t help anyone who had already baked theirs for months or years.
Real Subaru ‘we fixed the head gaskets, for real this time’ vibes
Subaru never offered 15 year warranty on their head gaskets.
The update in this case was software. It reduces the charging rate and runs fans during charging to lower the temperature the ICCU has to endure. I bought my car in early 2025 with the update in place and never ran the ICCU at the older, higher temperature. I suspect that a fix like that wouldn’t help anyone who had already baked theirs for months or years.