Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Hyundai Ioniq Plug-In Hybrid SELFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | Gas/Electric | 4.58 OZS. | 0.13 L | POE | S | ||
| Air Cond Refrigerant | Gas/Electric | 1.32 LBS. | 0.59 KG | R-134a | S | ||
| Automatic Transmission Fluid | Gas/Electric,Automatic DCT Trans | N/A | N/A | HK D DCTF TGO-10 (SK) SPIRAX S6 GHDE 70W DCTF (H.K.SHELL) 7 DCTF HKM (S-OIL) (API GL-4, SAE 70W) | Capacity is between: 1.69 - 1.79 qt. | S | |
| Brake Fluid | N/A | N/A | FMVSS116 DOT 3 or DOT 4 Brake Fluid | As required. | S | ||
| Engine Coolant | Gas/Electric | Engine Coolant | 7.07 QTS. | 6.69 L | Mixture of antifreeze and water (Phosphate-based Ethylene glycol coolant for aluminum radiator) | S | |
| Engine Coolant | Gas/Electric | Inverter Coolant | 3.38 QTS. | 3.19 L | Mixture of antifreeze and water (Phosphate-based Ethylene glycol coolant for aluminum radiator) | S | |
| Engine Oil | Gas/Electric | Drain and Refill | 4.00 QTS. | 3.78 L | SAE 0W-20 API SN (or above) or ACEA C2 | Engine oils labeled Energy Conserving Oil are now available. Along with other additional benefits, they contribute to fuel economy by reducing the amount of fuel necessary to overcome engine friction. Often, these improvements are difficult to measure in everyday driving, but in a year's time, they can offer significant cost and energy savings. If the ACEA C2 engine oil is not available in your country, you are able to use ILSAC GF-3 (or above) or ACEA A3 (or above). | S |
| Fuel Tank | Plug-In Hybrid Limited,Plug-In Hybrid SE,Plug-In Hybrid SEL, | 11.40 GALS. | 43.15 L | S | |||
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.