Recommended Maintenance & Wear Parts for a 2021 Hyundai Sonata
The common service parts a 2021 Hyundai Sonata needs — typical replacement intervals, what to watch for, and where to buy each one. Confirm exact fitment by VIN before purchasing.
Hyundai’s maintenance schedule for the 2021 Hyundai Sonata lists the oil filter every 7,500 mi, engine air filter every 22,500 mi, cabin air filter every 7,500 mi and spark plugs every 97,500 mi. The other 11 parts below have no interval in that schedule and are replaced on condition; the ranges shown for them are general guidelines for all cars. TecDoc part numbers are on file for 8 of the 15 parts on the 1.6 L petrol, 4-cyl, 180 hp engine. NHTSA also lists 4 safety recalls for this model, most often for the fuel system, gasoline (2).
Last updated: · Specs: NHTSA vPIC · Recalls: NHTSA
2021 Hyundai Sonata maintenance & wear parts
Intervals marked OEM are manufacturer-recommended for this vehicle; the rest are typical guidelines. Your real schedule still varies by engine, trim and driving conditions — Always follow your owner's manual and confirm the exact part by VIN before buying.
| Part | System | Interval | Common signs | Part no. (TecDoc) | Shop |
|---|---|---|---|---|---|
| Brake Pads | Brakes | General: Every 40,000–70,000 km | Squeal, grinding, longer stops | P 30 138 BREMBO | Shop → |
| Brake Rotors | Brakes | General: With pads / if warped | Pedal pulsation, deep scoring | 320.3814.20 ZIMMERMANN | Shop → |
| Oil Filter | Engine | Every 7,500 mi OEM | Replaced with the oil | — | Shop → |
| Engine Air Filter | Engine | Every 22,500 mi OEM | Low MPG, weak acceleration | 33-5108 K&N Filters | Shop → |
| Cabin Air Filter | HVAC | Every 7,500 mi OEM | Weak airflow, musty smell | VF2085 K&N Filters | Shop → |
| Spark Plugs | Ignition | Every 97,500 mi OEM | Rough idle, misfires | — | Shop → |
| 12V Battery | Electrical | General: Every 3–5 years | Slow crank, dim lights | — | Shop → |
| Alternator | Electrical | General: As needed (no fixed interval) | Battery light, dimming lights | — | Shop → |
| Starter Motor | Electrical | General: As needed (no fixed interval) | Click on start, no-crank | — | Shop → |
| Wiper Blades | Exterior | General: Every 6–12 months | Streaking, chattering | 3 397 010 00J BOSCH | Shop → |
| Headlight Bulbs | Lighting | General: As needed (when dim or out) | One side dim or burnt out | 1 987 302 807 BOSCH | Shop → |
| Serpentine Belt | Engine | General: Every 80,000–160,000 km | Squeal on cold start, cracks | — | Shop → |
| Fuel Filter | Fuel System | General: 50,000–100,000 km (or lifetime in-tank) | Hard start, hesitation | — | Shop → |
| Radiator | Cooling | General: As needed (leaks / overheating) | Overheating, coolant leak | 40D308-2 SRLine | Shop → |
| Water Pump | Cooling | General: Often done with the timing belt | Coolant leak, whine, overheat | WP6506 FAI AutoParts | Shop → |
2021 Hyundai Sonata specifications
| Specification | Value |
|---|---|
| Make | Hyundai |
| Model | Sonata |
| Model Year | 2021 |
| Overall Length (mm) | 4900 |
| Overall Width (mm) | 1860 |
| Overall Height (mm) | 1450 |
| Wheelbase (mm) | 2840 |
| Curb Weight (kg) | 1527 |
| Front Bumper to Windshield Base (mm) | 1350 |
| Side Glass Height (mm) | 360 |
| Side Glass Base to Rocker Panel (mm) | 810 |
| Roof Width Between Side Rails (mm) | 1120 |
| Front Overhang (mm) | 950 |
| Rear Overhang (mm) | 1120 |
| Front Track Width (mm) | 1620 |
| Rear Track Width (mm) | 1630 |
| Weight Distribution, Front/Rear (%) | 60/40 |
| Models Hyundai offered in 2021 | 15 |
Source: NHTSA vPIC / Canadian Vehicle Specifications. Linear dimensions in mm; weight in kg. Your exact build may vary by trim — decode your VIN to confirm.
Open recalls on the 2021 Hyundai Sonata (4)
The NHTSA database lists 4 safety recalls for the 2021 Hyundai Sonata, affecting: FUEL SYSTEM, GASOLINE, VISIBILITY, POWER TRAIN. A recall repair is free at a franchised dealer. Check whether yours is affected by your exact VIN.
| Component | Summary |
|---|---|
| FUEL SYSTEM, GASOLINE · DELIVERY | Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Santa Fe and Sonata vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between t… |
| VISIBILITY · WINDSHIELD | Hyundai Motor America (Hyundai) is recalling certain 2020-2021 Santa Fe, 2021 Sonata, and Elantra vehicles. During manufacturing, the windshield may not have been properly bonded … |
| POWER TRAIN · AUTOMATIC TRANSMISSION | Hyundai Motor Company (Hyundai) is recalling certain 2021-2022 Santa Fe, Sonata, Veloster N, 2022 Santa Cruz, Elantra N, and Kona N vehicles. The vehicle's "fail-safe" limited-mob… |
| FUEL SYSTEM, GASOLINE | Hyundai Motor America (Hyundai) is recalling certain 2020-2023 Sonata vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exh… |
See all recalls for the 2021 Hyundai Sonata → · Source: NHTSA. Confirm by VIN before assuming a recall applies.
Find the exact part by VIN
Search 1.2M+ parts filtered to your exact 2021 Hyundai Sonata by VIN. Stop buying the wrong part.
Find parts by VIN →Decode your exact VIN
Get 100+ specs for your specific 2021 Hyundai Sonata — engine, trim, recalls, and a PDF. Instant decode for $1.99.
Decode my VIN →Frequently asked questions
How often should parts be replaced on a 2021 Hyundai Sonata?
Hyundai’s maintenance schedule for the 2021 Hyundai Sonata lists the oil filter every 7,500 mi, engine air filter every 22,500 mi, cabin air filter every 7,500 mi and spark plugs every 97,500 mi. Parts not in that schedule, such as brake pads, are replaced when inspection shows wear.
What part numbers fit a 2021 Hyundai Sonata?
For the 1.6 L petrol, 4-cyl, 180 hp engine, TecDoc lists brake pads BREMBO P 30 138, brake rotors ZIMMERMANN 320.3814.20, engine air filter K&N Filters 33-5108 and cabin air filter K&N Filters VF2085, among others; 8 of the 15 parts in the table have a catalogued number. Other engines of the same model year can need different parts.
What maintenance parts does a 2021 Hyundai Sonata need?
The recurring service and wear parts are brake pads and rotors, the engine oil, air and cabin filters, spark plugs, the 12V battery, wiper blades, headlight bulbs and the serpentine belt; the alternator, starter, radiator and water pump are replaced when they fail.
Where can I buy parts for a 2021 Hyundai Sonata?
Each row links to marketplace listings for that part on this 2021 Hyundai Sonata. Confirm fit before buying: a VIN lookup resolves the engine and trim that decide which part number is correct.