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 Sonata N LineFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | 2.5L Eng | 4.00 OZS. | 0.11 L | PAG (FD46XG) | S | ||
| Air Cond Refrigerant | 2.5L Eng | 1.15 LBS. | 0.52 KG | R-1234yf | S | ||
| Automatic Transmission Fluid | 2.5L Eng,Automatic DCT Trans | Control Oil | 2.60 QTS. | 2.46 L | GS WDCTF HD H (WET DCT HYDRAULIC CONTROL OIL) | S | |
| Automatic Transmission Fluid | 2.5L Eng,Automatic DCT Trans | Gear Oil | 3.55 QTS. | 3.35 L | GS WDCTF HD G (WET DCT FLUID) | S | |
| Brake Fluid | N/A | N/A | DOT 4 Brake Fluid | Fluid Capacity is between: 0.74 - 0.85 qts. | S | ||
| Engine Coolant | 2.5L Eng,Turbocharger | 8.59 QTS. | 8.12 L | 50/50 mixture of Ethylene Glycol Antifreeze and water | The engine coolant should be compatible with aluminum engine parts. | S | |
| Engine Oil | 2.5L Eng | Drain and Refill,w/Filter | 6.13 QTS. | 5.8 L | API - SN PLUS SAE 0W-20 Full synthetic engine oil | If the recommended engine oil is not available in your country, you are able to use API SL/ILSAC GF-3 or ACEA A3. For better fuel economy, it is recommended to use the engine oil of a viscosity grade 0W-20 (API Latest (SN PLUS)). | S |
| Fuel Tank | 2.5L Eng | 18.50 GALS. | 70.03 L | S | |||
| Windshield Washer Fluid | N/A | N/A | Use a good quality windshield washer fluid, diluted with water as necessary. | S | |||
Factory Service Tools
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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.