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⚙️ Shift Smoothly, Drive Confidently — The Fluid of Future-Ready Transmissions
Idemitsu's ATF Type HK4 is a synthetic automatic transmission fluid specifically designed for Hyundai and Kia vehicles. It delivers precision frictional control for smooth shifting, outstanding anti-shudder performance, and advanced anti-wear protection. With excellent oxidation resistance and seal conditioning, it extends fluid life and prevents leaks, ensuring your transmission stays clean and efficient under high thermal stress.






| ASIN | B07M8TDJ6R |
| Best Sellers Rank | #27,309 in Automotive ( See Top 100 in Automotive ) #89 in Transmission Fluids |
| Brand | Idemitsu |
| Brand Name | Idemitsu |
| Container Type | Bottle |
| Customer Reviews | 4.9 out of 5 stars 37 Reviews |
| Flash Point | 203 Degrees Celsius |
| Global Trade Identification Number | 00852967006874 |
| Included Components | Quart of ATF |
| Item Form | Oil |
| Item Type Name | Idemitsu ATF Type HK4 Automatic Transmission Fluid for Hyundai/Kia - 1 Quart |
| Item Weight | 1.9 Pounds |
| Liquid Volume | 1 Quarts |
| Manufacturer | Idemitsu |
| Material | Synthetic |
| Model Number | 30040100-75000C020 |
| Number of Items | 1 |
| Package Information | Bottle |
| Part Number | 30040100-75000C020 |
| Recommended Uses For Product | Transmission Fluid |
| Specific Uses For Product | Automotive |
| UPC | 852967006874 |
| Unit Count | 32.0 Fluid Ounces |
| Upper Temperature Rating | 203 Degrees Celsius |
| Viscosity | 24.83 Centistokes |
J**E
Quality of the product used
Vehicle shifts smoother after service.
G**Z
Great
Great product
T**.
Muy bueno lo recomiendo
Lo recomiendo muy bueno .el carro trabaja super bien
D**Z
Producto de excelente calidad y precio
Muy buen precio y excelente calidad, el aceite ideal para transmisión automática de un Hyundai Elantra-2013.
M**M
2019 Kia soul 1.6l GDI
This is a high-quality fluid that is designed specifically for my car’s transmission. This is the same manufacturer that makes all of Kia/Hyundai fluids when they are manufactured. I do a fluid drain and fill every 30,000 miles. and haven’t had any problems at all. When it comes to my Kia, this is the only transmission fluid I use.
P**O
Good quality
They are the best
J**E
Auto transmission fluid service
So far so good in a 2015 Kia soul
A**N
Good Quality for Hyundai
Did the job for a 2012 Sonata
Trustpilot
3 days ago
3 weeks ago