What fluid?
DOT-4 meeting SAE J1704 DOT-4 LV, ISO 4925 CLASS-6, and FMVSS 116 DOT-4. 0.74 to 0.85 US qt.
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In-depth guide
2021 Hyundai Sonata
2021 Sonata brake fluid is DOT-4, 0.74 to 0.85 US qt. Pads are inspected on the schedule. No pad thickness or caliper torque is printed.
| Item | Figure |
|---|---|
| Fluid | 0.74–0.85 US qt (0.7–0.8 L). DOT-4. SAE J1704 DOT-4 LV, ISO 4925 CLASS-6, and FMVSS 116 DOT-4. |
| Fluid interval | Inspect every 8,000 miles (13,000 km) or 12 months. Replace every 48,000 miles (78,000 km) or 48 months. |
| Pads | Inspect mark in every schedule column. No thickness and no caliper torque. |
Source: owner's manual / last verified 2026-10-16 (2021 Hyundai Sonata owner's manual, brake fluid and the maintenance schedule (opens in a new tab)).
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2021 Hyundai Sonata owner's manual, brake fluid and the maintenance schedule (opens in a new tab), Hyundai Motor America, published 2020-08-20, read 2026-10-16.
Torque wrench
For the wheel nuts if a wheel comes off. That torque is on the wheel lug nut guide.
Jack and jack stands
Do not work under the car on a jack alone.
| Item | Figure | Where it comes from |
|---|---|---|
| Fluid | 0.74–0.85 US qt (0.7–0.8 L). DOT-4. SAE J1704 DOT-4 LV, ISO 4925 CLASS-6, and FMVSS 116 DOT-4. | Recommended lubricants |
| Fluid interval | Inspect every 8,000 miles (13,000 km) or 12 months. Replace every 48,000 miles (78,000 km) or 48 months. | Normal maintenance schedule |
| Pads | Inspect mark in every schedule column. No thickness and no caliper torque. | Normal maintenance schedule |
Every 8,000 miles (13,000 km) or 12 months, because that is the column step and the inspect mark is in every column.
Inspect every 8,000 miles or 12 months. Replace every 48,000 miles or 48 months.
No caliper torque and no pad thickness are printed.
2021 Sonata Owner's Manual. The PDF title is 2021 Sonata Owners Manual and the file was created August 20, 2020. Wheel nuts are the wheel lug nut guide.
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Part
DOT-4 LV brake fluid for a 2021 Hyundai Sonata
SAE J1704 DOT-4 LV, ISO 4925 CLASS-6, and FMVSS 116 DOT-4. 0.74 to 0.85 US qt.
2021 Sonata brake fluid (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)As an Amazon Associate I earn from qualifying purchases.
Tool
Torque wrench
For the wheel nuts if a wheel comes off. That torque is on the wheel lug nut guide.
Tool
Jack and jack stands
Do not work under the car on a jack alone.
DOT-4 meeting SAE J1704 DOT-4 LV, ISO 4925 CLASS-6, and FMVSS 116 DOT-4. 0.74 to 0.85 US qt.
Every column, which steps by 8,000 miles (13,000 km) or 12 months.
The maintenance checklist is on the site now. The email list is not sending yet, so this box will not store an address.
These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.
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