Hydrogen fuel cell system is unstable/unreliable. Vehicle fueling infrastructure is completely unreliable and cannot be depended on for safe, ongoing operation of vehicle.
The worst 2021 Hyundai Nexo problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Fuel system4
- Electrical2
- Engine2
- Driver assistance1
- Transmission1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Fuel system4
- Electrical2
- Engine2
- Driver assistance1
- Transmission1
Recalls 2
Fuel system, other: storage: tank assembly: pressure relief devices
- What is wrong
- Hyundai Motor America (Hyundai) is recalling certain 2019-2024 Nexo vehicles. The thermally activated pressure relief device (TPRD) may break and cause a hydrogen gas leak, which can result in a fire while parked.
- Risk
- A vehicle fire increases the risk of injury.
- Remedy
- Owners are advised to park outside and away from structures until the recall remedy is completed. Dealers will replace the TPRD, free of charge. Interim notification letters, notifying owners of the safety risk, were mailed November 8, 2024. Final owner notification letters will be mailed in phases, beginning January 6, 2025. Owners may contact Hyundai Customer Service at 800‑633‑5151. Hyundai's number for this recall is 269.
Recall number 24V761000 · Recall details
Fuel system, other: delivery
- What is wrong
- Hyundai Motor America (Hyundai) is recalling certain 2019-2021 Nexo vehicles. The hydrogen gas detection sensors may fail to detect leaks in the hydrogen gas delivery system.
- Risk
- A hydrogen gas leak can increase the risk of a fire while parked or driving.
- Remedy
- Owners are advised to park their vehicles outside and away from structures until the recall remedy is completed. Dealers will replace the hydrogen gas detection sensors, free of charge. Owner notification letters were mailed August 12, 2022. Owners may contact Hyundai customer service at 1‑855‑371‑9460. Hyundai's number for this recall is 225.
Recall number 22V258000 · Recall details
Technical service bulletins for the 2021 Hyundai Nexo 17
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Some Hyundai vehicles may be equipped with a parking distance warning (PDW) sensor(s) that may trigger...
- The federal safety agency has issued an urgent safety advisory regarding dangerous, counterfeit...
- The federal safety agency has identified the presence of substandard and dangerous driver’s-side airbag...
- This bulletin provides information regarding condensation related to the accumulated moisture in the...
- Loss of connectivity or interruptions in the middle of using Bluelink Service functions
- Loss of connectivity or interruptions in the middle of using Bluelink Service functions
- This bulletin contains information about the proper removal of the windshield wiper blade protective cover...
- This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
- This bulletin provides information on how to properly vent Hydrogen from a Nexo FCEV for maintenance or...
- Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships
What 2021 Hyundai Nexo owners say
Most recent owner complaints, unedited.
It has become more frequent for there to be a delay in acceleration of about 3 to 4 seconds when traveling uphill. My car lost acceleration while going uphill. As I was gradually accelerating from a red traffic light to climb a hill, my car became stuck at a certain speed, around 50 mph on April 3rd. Even when pressing the acceleration pedal to the maximum, it wouldn't accelerate. On March 2nd, while entering the freeway on an uphill section, my car suddently lost acceleration and slowed down for about 4 seconds before finally accelerating again. At the moment, a car was traveling fast in the right lane, and I narrowly avoided being hit by it. I quickly moved onto the shoulder and then returned to the right lane when it was safe. Posing serious safety concerns for both myself as the driver and any passengers in the car. My car has been towed in and is currently being investigated by technicians at the Hyundai dealer (Tustin) since 4/05/2024.
Catastrophic issue awaiting to happen. I am fearful the car can blow up. Hydrogen gas leak has been detected since March 2022. After and during the pumping, often there would be a loud hissing sound coming from the vehicle no from the pump itself. After fueling with hydrogen gas, it takes a minute for the car to read and update the tank. Then it throws loud flashing warnings on the dashboard stating the car needs to be pull over immediately. It reads “Hydrogen leak detected. Stop safely immediately. Check fuel cell system. Range limited to 2 mi. Stop safely immediately”. The use of this car is to drive my family around including to and from school. My kids are scare to be in the car. I am terrified that the car could be a bomb. People in line with the Toyota Mirai were frighten. They said I shouldn’t be driving this car. This has been happening since March 2021. Hyundai acknowledges the issue and issues recall 225. I went into service the vehicle on Sep 29 and picked it up a week later. The recall fix made the issue worst. I have opened a case with Hyundai and they are not taking this issue serious. I have asked them to escalate this issue and to stop my lease this vehicle is inoperable. Hyundai case # 20439918. Capitol Hyundai recall invoice # 298143. This vehicle is inoperable.
The contact owns a 2021 Hyundai Nexo. The contact received notification of the federal safety agency Campaign Number: 22V258000 (Fuel System, Other, Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.
The car does not automatically brake to avoid collision. I have tested the car by going straight into a large object either another car or person in front of my car and it will not brake. In addition the hydrogen sensor is not working properly as I have already been informed of from their recall number 225 the federal safety agency Recall 22V‑258 which I just received a few days ago. I am dissappointed that it took 3 months for Hyundai to notify me of this very serious safety issue and I am now calling the federal safety agency to see what options I have to return this vehicle as I do not feel safe driving, operating, or even parking my car at my home with a hydrogen sensor that is faulty as that is a very serious fire hazard.
Compare the 2021 Hyundai Nexo
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Questions about the 2021 Hyundai Nexo
Is the 2021 Hyundai Nexo reliable?
Owners have filed 5 complaints about the 2021 Hyundai Nexo, close to a typical Nexo model year.
What is the most common problem with the 2021 Hyundai Nexo?
Fuel and propulsion system, with 4 complaints. Next is electrical (2).
How many recalls does the 2021 Hyundai Nexo have?
2 recalls, covering fuel system, other.
Was there a recall on the 2021 Hyundai Nexo fuel system?
Yes, 2 recalls: 24V761000, 22V258000. Check your VIN to see if your car still needs the free repair.
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