What I found that you can buy in Germany
Unfortunately, this is the frustrating part: I could not find a reputable German retailer currently selling SK/MICHANG/S-OIL SP4M-1 as a normal stocked product.
I found genuine Hyundai/Kia 04500-00125 listings internationally, but not a German supplier with convincing availability. That part number is indeed associated with Hyundai/Kia ATF SP-IV M-1.
And there's an interesting twist regarding your Ravenol:
Ravenol's own cross-reference actually identifies Hyundai 04500-00125 as an equivalent for its ATF SP-IV Fluid.
However, German parts retailers describe that Ravenol product primarily against the A6GF1/A6MF/A6LF conventional automatic transmissions, rather than the e-GMP reduction gear.
That is why I still wouldn't use the Ravenol as my first choice for your IONIQ 5 reduction gear.
My ranking
| Option | My confidence for IONIQ 5 reduction gear |
| Hyundai/Kia genuine SP4M-1 / HK ATF 65 SP4M-1 | 🟢 Best |
| SK ATF SP4M-1 | 🟢 Excellent — explicitly listed by Kia |
| MICHANG ATF SP4M-1 | 🟢 Excellent — explicitly listed by Kia |
| S-OIL ATF SP4M-1 | 🟢 Excellent — explicitly listed by Kia |
| Other oil explicitly approved for SP4M-1 | 🟢/🟡 Depends on manufacturer's documentation |
| Ravenol ATF SP-IV Fluid | 🟡 Probably chemically close, but not explicitly documented for e-GMP reduction gear |
| Generic “SP-IV / SP-IV-M1 compatible” | 🔴 I would avoid |
One thing I'd actually consider doing
Given that the IONIQ 5 reduction gear only takes about 0.75 L according to the current Hyundai manual, I would personally buy the genuine Hyundai/Kia fluid from a Hyundai/Kia parts dealer rather than spend a lot of effort hunting for an aftermarket substitute.
That's particularly attractive because we're talking about less than one litre. Even if the genuine fluid costs €20–40/L rather than €10/L, the total cost of getting the correct fluid is tiny compared with the reduction unit.
But there is a potentially interesting avenue
I think we should investigate Hyundai/Kia part number 04500-00125 specifically in Germany/Europe rather than searching for "HK ATF 65 SP4M-1." The latter terminology seems to be poorly indexed by European parts retailers, while 04500-00125 is an actual Hyundai/Kia OE number.
And there's another reason I'm interested in this: Ravenol itself cross-references its SP-IV Fluid to 04500-00125, which suggests that the distinction between your Ravenol and the genuine fluid may be less clear-cut than I initially thought.
So I would not drain your Ravenol in a panic. We should first establish whether 04500-00125 is actually the same fluid/formulation as the IONIQ 5's HK ATF 65 SP4M-1, or whether Hyundai uses different formulations under that OE number.
If you want, I can do that next: trace 04500-00125 → Hyundai/Kia/SK/Michang → Ravenol's formulation and datasheet, and see whether your Ravenol is actually a perfectly reasonable substitute after all. That would be much more definitive than simply going by the labels.
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Yes — and after tracing the part number, I need to correct my earlier assessment of your Ravenol oil.
The evidence now points to a much more nuanced conclusion.
The key finding
Hyundai/Kia part 04500-00125 is indeed ATF SP4M-1, SAE 75W. More importantly, it is the genuine Hyundai/Kia/Mobis fluid associated with the e-GMP reduction gear. A Korean Mobis parts listing explicitly identifies 04500-00125 as “ATF SP4M-1, SAE 75W” and lists EV applications; another current listing specifically describes it for the IONIQ 5 reduction gear.
And here's the really interesting part:
Ravenol ATF SP-IV Fluid 1211107 lists Kia 04500-00125 as an OE cross-reference.
So your choice was not nearly as wrong as I initially suggested.
However, there is still a caveat
Ravenol's own/application data describes ATF SP-IV Fluid 1211107 primarily for conventional Hyundai/Kia automatic transmissions — A6GF1, A6MF1/2, A6LF1/2/3, etc.
And the product data does not explicitly say "IONIQ 5 reduction gear".
That's an important distinction between:
Zitat
"Ravenol cross-references this product to 04500-00125"
and
Zitat
"Ravenol explicitly approves this product for the IONIQ 5 reduction gear."
The first is demonstrably true. The second I have not been able to establish.
Why the situation is confusing
We essentially have this chain:
Hyundai IONIQ 5 manual
→ HK ATF 65 SP4M-1
Hyundai/Kia OEM fluid
→ 04500-00125
OEM fluid specification
→ ATF SP4M-1, SAE 75W
Ravenol ATF SP-IV Fluid 1211107
→ lists Kia 04500-00125 as an OE comparison number.
That makes it very difficult to argue that your Ravenol is simply an unrelated "SP-IV" oil.
In fact, I would now be considerably less concerned about the oil you already put in the car.
One thing that initially confused me
Ravenol's product information also lists:
- Hyundai 00232-19045
- Hyundai 04500-00115
- Kia 04500-00125
- Kia UM090-CH042
as OE numbers.
But 04500-00115 is the older SP-IV fluid, whereas 04500-00125 is the newer SP4M-1 fluid. So catalog cross-referencing is messy and shouldn't automatically be interpreted as "these oils are identical."
There is also evidence that SP4M-1 replaced the older SP-IV formulation, with SP4M-1 being SAE 75W.
What would I do in your situation?
Honestly:
If I had already filled my IONIQ 5 with Ravenol 1211107
I would not drain it immediately.
The evidence we've found is sufficiently strong that I wouldn't consider this an obvious or dangerous mistake.
Your Ravenol:
- is specifically formulated for Hyundai/Kia SP-IV applications;
- is cross-referenced by parts catalogs to Kia 04500-00125;
- and 04500-00125 is the genuine SP4M-1 / SAE 75W fluid used in the e-GMP reduction gear.
That's quite different from putting an arbitrary Dexron/Mercon/ATF fluid in there.
If you want absolute OEM certainty
Then I'd do one more fluid change with genuine 04500-00125 at the next convenient opportunity.
Not because I think your Ravenol has already damaged anything, but because then there is zero argument about specification.
And because the reduction gear uses only around a litre-ish of fluid, the cost difference is trivial compared with the cost of the drive unit.
My revised verdict
I'd now rate your situation approximately:
🟢 Low concern — not an emergency.
I would not drive the car to a workshop immediately just to get the Ravenol out.
If you want to be maximally conservative, replace it with genuine 04500-00125. But I would no longer tell you that the Ravenol was clearly the wrong fluid. The 04500-00125 cross-reference is significant evidence in its favor.
One thing I'd like to investigate further
There's one remaining question that could settle this almost completely:
Is Ravenol 1211107 actually the same formulation as the Hyundai/Kia 04500-00125, or is the catalog merely using 04500-00125 as a broad vehicle/OE cross-reference?
If we can find the Ravenol technical data sheet (viscosity at 40/100 °C, VI, density, pour point, etc.) and the OEM SP4M-1 data, we can compare them directly. That would tell us whether your Ravenol is merely "cross-listed" or is genuinely a very close/identical formulation.