The 2020 Hyundai Sonata carries 4 open NHTSA recalls — most recently covering software and labels. Owners report 8 recurring issue clusters, led by “Fuel tank swelling and expansion (recall 25V796000).” Hyundai's owner's manual splits service into Normal and Severe schedules. Most US drivers qualify as Severe due to short trips, extreme temperatures, or stop-and-go traffic. Hyundai Assurance covers the first 3 years / 36,000 miles of complimentary maintenance on new vehicles. The Theta II 2.0L and 2.4L engines (2011-2019) are subject to TSBs around oil consumption — strict adherence to oil intervals matters.
ELECTRICAL SYSTEM:SOFTWARE
Campaign #20V213000 · Sep 4, 2020
Issue: Hyundai Motor America (Hyundai) is recalling certain 2020 Nexo and Sonata vehicles. The Remote Smart Parking Assist (RSPA) software may fail to prevent vehicle movement upon detection of an RSPA system malfunction.
Risk: Unintended vehicle movement increases the risk of a crash.
Fix: Hyundai will notify owners, and dealers will reprogram the RSPA software, free of charge. The recall began June 3, 2020. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 191.
EQUIPMENT:OTHER:LABELS
Campaign #20V122000 · Feb 28, 2020
Issue: Hyundai Motor America (Hyundai) is recalling certain 2020 Sonata vehicles produced between October 22, 2019 and February 13, 2020. The tire pressure label inside the driver's door and the owner's manual state an incorrect tire size. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."
Risk: The incorrect tire information may mislead the vehicle owner to install the wrong tire size, potentially affecting vehicle handling, increasing the risk of a crash.
Fix: Hyundai will notify owners, and dealers will install new label stickers over the tire pressure label and in the owner's manual, free of charge. The recall began April 22, 2020. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 190.
LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH
Campaign #22V196000 · Mar 28, 2022
Issue: Hyundai Motor America (Hyundai) is recalling certain 2020 Sonata and Sonata Hybrid, and 2019 Genesis G70 vehicles. The trunk latch may become damaged, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 401, "Internal Trunk Release."
Risk: A person inside the trunk compartment may become trapped, increasing their risk of injury.
Fix: Dealers will inspect the trunk latch and replace the trunk latch base, as necessary, free of charge. Owner notification letters were mailed May 26, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 221/010G.
FUEL SYSTEM, GASOLINE
Campaign #25V796000 · Nov 18, 2025
Issue: 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 exhaust components, melting the tank.
Risk: A melted fuel tank can leak, increasing the risk of a fire.
Fix: Dealers will inspect and replace the check valve. The fuel tank assembly will be inspected for damage and replaced if necessary. Additionally, dealers will inspect and update the engine control unit software. All repairs will be performed as necessary, free of charge. Owner notification letters were mailed beginning March 13, 2026. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 286. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 19, 2025.
What drivers and federal regulators have officially reported about the 2020 Hyundai Sonata.
FUEL/PROPULSION SYSTEM
47 NHTSA complaints · 2024-05 → 2026-07
“Service Campaign 9B1 That my gas tank has explanded/exploded due to the issue noted in the subject line. As you can see the whole bottom of the backseats have been raised up imcluding the part that connects to the gas tank itself”
“Fuel system expanded back seat”
“Gas tank replaced three times and failed each installation (excess pressure)leaked gas with riders in car”
BACK OVER PREVENTION
5 NHTSA complaints · 2025-06 → 2026-03
“Rear camera doesn’t work and is just a black screen. It started out intermittent and now doesn’t work at all”
“The contact owns a 2020 Hyundai Sonata. The contact stated that while reversing, the back-over prevention camera malfunctioned, and there was no image of the rear of the vehicle displayed”
“The contact owns a 2020 Hyundai Sonata. The contact stated that after shifting into reverse(R), the back over prevention camera screen temporarily displayed an image before the screen went black”
STEERING
4 NHTSA complaints · 2020-10 → 2022-10
“2020 Sonata......Steering wheel has started to make a raspy, rubbing noise when turned. When researching this problem on U tube, it is apparently a fairly common problem with Hyundai vehicles”
“Steering wheel makes whining/scrubbing noise when turning. Steering a vehicle is a critical component of safety and being able to avoid dangerous situations”
“WHEN STEERING THERE IS A LOUD NOISE WHEN TURNING IN EITHER DIRECTION BE IT LEFT OR RIGHT, SOMETHING IS RUBBING IN THE STIRRING COLUMN, WITH THE STIRRING HAVING FOR TO MUCH PLAY ALL MOST TURNING COMPLETELY A FULL CIRCLE”
STRUCTURE
4 NHTSA complaints · 2023-04 → 2026-02
“White pain is pealing off and it’s pretty bad especially when going through car wash”
“I own a 2020 Hyundai Sonata with factory-applied paint. The vehicle developed paint peeling/clear-coat failure on the driver-side rear quarter panel without any prior damage, accident, or repainting”
“Exterior paint is peeling and stripping. Hood, doors, front and rear bumper, side skirts, and front lip”
ENGINE
4 NHTSA complaints · 2022-09 → 2026-07
“The contact owns a 2020 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the low oil warning light illuminated. The contact added oil to the engine. The dealer was made aware of the failure”
“My 2020 Hyundai Sonata 2.5L is experiencing excessive engine oil consumption. At approximately 88,063 miles, Great Lakes Hyundai documented that the engine oil level was 1.30 quarts below full after an oil-consumption check”
“I have had my car since January of 2023 and I have had no significant issues. I bought the car with roughly 30,000 miles, fast forward to February of 2026 it has about 123,000 miles and the engine is burning oil very fast”
ELECTRICAL SYSTEM
11 NHTSA complaints · 2022-09 → 2026-07
“Fan motor fuse box quit working and ac/heat no longer operational. First time was around October 21, 2025”
“No air coming from cabin, upon further inspection found melted multifuse with melting terminal pin area in fuse box. No prior signs of warning, leaving vehicle without operable air condition for high temperatures”
“Multi fuse controlling the A/C blower has burned out 3 times in the past year”
POWER TRAIN
22 NHTSA complaints · 2020-07 → 2026-07
“My 2020 Hyundai Sonata has a recurring defect in its engine or transmission, causing sudden deceleration to ~10 mph without warning, often on major highways, with warning lights (check engine, ESC, traction control, etc.) flashing seconds before the car decelerates”
“My certified pre-owned 2020 Hyundai Sonata has experienced the same critical transmission failure three times since October 2024, creating dangerous safety conditions on highways and city streets”
“Driving on the Interstate at 65mph the car suddenly goes down to 5mph. Unwanted deceleration! At the same time the dash warning lights come on. Check engine and ABS. This happened 3 times now”
AIR BAGS
5 NHTSA complaints · 2020-08 → 2020-09
“PASSENGER AIR BAG DOES NOT WORK IF PASSENGER USES A CUSHON OR A HEAVY COAT. DEALER SAID THEY CAN NOT CHANGE THIS I WAS TOLD TO CONTACK HYUNDAI”
“MY PASSENGER AIR BAG WILL NOT WORK WITH A CUSHION.. I TRIED IT WITH NO CUSHION BUT WITH A LONG WINTER COAT AND THE IS NO AIR BAG”
“I NEVER GOT WHAT I WANTED FROM HYUNDAI. I WAS TOLD THAT YOU CANNOT USE A CUSHION AND HAVE A PASSENGER AIRBAG.. I WENT UP TO CEO, STILL SAME ANSWER. I TRIED”
Note: NHTSA also opened 1 defect investigation(s) on this vehicle that closed without action.
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 11, 2026. Investigation data refreshed Sep 11, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Critical for safety and preventing major damage
Severe service: every 3,750 miles. Normal service: 7,500 miles. Theta II 2.0L/2.4L (Sonata, Santa Fe, Tucson 2011-2019): never extend — oil consumption issues are documented in Hyundai TSBs.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Rotate tires every 7,500 miles. AWD Tucson and Santa Fe owners benefit from rotation at 5,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Often free at the shop where you bought the tires — worth asking before paying.
Inspect brake pads, rotors, calipers, and parking brake every 7,500 miles. Elantra and Sonata front pads typically last 40,000-50,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.
Replace DOT 3 brake fluid every 30,000 miles or 24 months. Required to maintain ABS and ESC pump life.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
Keeps your vehicle running smoothly and efficiently
Replace engine air filter every 30,000 miles. Severe service or dusty conditions: 15,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
Severe service: every 30,000 miles. Normal: 60,000 miles. Use Hyundai SP-IV or SPH-IV — substitutes can cause harsh shifting and torque converter damage.
Estimated cost — typical U.S. ranges
Dealer
~$330–$500
Shop
~$235–$355
DIY
~$60–$180
Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.
Iridium spark plugs are rated 105,000 miles on Theta II, Lambda II, and Smartstream engines. 1.6T (Veloster N, Kona N): 60,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
Hyundai Long-Life Coolant (pink): first change at 60,000 miles, then every 30,000. Do not substitute green or orange coolant — it damages the cylinder head gasket on GDI engines.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Extends the life of your vehicle and improves comfort
Replace cabin air filter every 15,000 miles. Located behind the glove box on most Hyundai models.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Inspect serpentine belt and tensioner every 60,000 miles. Replace at 90,000 miles on most models.
Estimated cost — typical U.S. ranges
Dealer
~$195–$235
Shop
~$135–$165
DIY
~$20–$50
DIY-friendly if you can reach the tensioner. Inspect for cracks rather than swap on a strict mileage interval.
Occupant deaths in fatal crashes (FARS)
22 crashes 2010–2024
FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number
Owner-reported problem signals
Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.
5
complaints mentioning a crash
1
complaints mentioning a fire
Reviewed known issues for this vehicle·Open recalls for this vehicle
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 2020 Hyundai Sonata reflects Hyundai's published service intervals and the Service Reminder system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.