What 983 owners told NHTSA about the 2017 Hyundai Tucson Fuel Cell

So in December of 2022 the vehicle above was recalled for Service Campaign 966 by hyundai and was completed. In 2024 it had the same issues again and the knock sensor was replaced twice in 2024. We just purchased the vehicle in January 2025 and know are having the same issuse and code showing the knock sensor is having issues. We reported it to the dealer we purchased from long hyundai of chattanooga and they aren't helping to resolve the issue. All they did before we bought it was say it had a weak battery and supposedly replaced the battery.

NHTSA ODI 11636714

The contact owns a 2017 Hyundai Tucson. The contact stated that several months after purchasing the vehicle, the vehicle was shaking abnormally while started. There was no warning light illuminated. The vehicle was taken to a dealer to be diagnosed. The contact was informed that there was an abnormal amount of carbon build up on the valves and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 90,000.

NHTSA ODI 11635946

The transmission in my vehicle failed while driving and the car completely shut off while driving. Less than 4 months after replacing the transmission with a brand new transmission, the engine failed while driving on the highway. The engine started sputtering, then it started smoking, then the car stalled.

NHTSA ODI 11635533

Greetings, I have had issues with the Hyundai Tucson 2017 I own for many months. Issues include among others an abnormal knocking noise from the engine, reduced engine power and/or hesitation, burning smell, oil leaking, and smoke coming out of the engine, misfires, and other issues. It happened many times on the highway and almost caused accidents and the last time it happened, the vehicle was towed, and recently the smoke coming from the engine forced me to pull over. I reported the issue to the dealer but they didn't recall or address the issue. The car has been maintained properly over time and now I fear for my life. It is totally unfair that about 100k of this brand have been recalled for the same issue, in my case it is just after I finished to pay in full the vehicle. I seek your support to have it addressed for safety

NHTSA ODI 11635446

There is an intermittent problem with the transmission. It’s impossible to predict when the transmission will slip. When navigating traffic, it has happened multiple times trying to pull out across oncoming traffic, and the transmission begins slipping so badly in a couple of instances nearly causing a side impact. There are no recalls related to this, but the dealership confirms it is common… the fact that it is intermittent makes it worse. You get used to the transmission performing as it should… Next thing you know it slips when you can’t afford for it to slip..

NHTSA ODI 11633518

I am constantly having to add oil to my car. It burns oil. It is not leaking oil. I have 81000 miles on my car. I get my oil changed regularly.

NHTSA ODI 11632772

I was using the access road to get on the highway but when I tried to accelerate the car was slow to accelerate and I almost got hit by other cars. I don’t know what happened but now I have a steady check engine light. When I called a mechanic he said I have a TSB from 2021 for the Dual Clutch but I didn’t see anything for this and my SaferCar app doesn’t mentions it either.

NHTSA ODI 11632112

My check engine light randomly started blinking and lost power. While driving

NHTSA ODI 11631950

My car hesitates when leaving a stop sign or light. It is random and I have no power to continue. If I put car in park than go sometimes it works, sometimes push down on gas more or sometimes I have to turn car off than back on. 2 near miss accidents

NHTSA ODI 11631951

The contact owns a 2017 Hyundai Tucson. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull to the shoulder of the roadway, where the failure persisted. The battery warning light was illuminated. The vehicle was towed to an independent mechanic, who was unable to duplicate the failure. The vehicle was not repaired. The vehicle was then towed to the dealer, who diagnosed a failure with the spark plugs. The vehicle was repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V727000 (Engine); but the VIN was not included. The failure mileage was 86,000.

NHTSA ODI 11631872

I am writing to report a serious issue with my 2017 Hyundai Tucson SEL 2.0 that poses potential safety risks. The vehicle is consuming more than 4 quarts of oil every 1,000 miles, which is far beyond normal and acceptable levels. The car has approximately 166,000 miles on it and has been regularly maintained, including timely oil changes. Despite proper maintenance, this excessive oil consumption leads to frequent low-oil warnings, risking sudden engine failure if not continuously monitored. This creates an unsafe driving condition, particularly on highways or during long trips, as the engine could seize without warning. Additionally, I am aware that many other owners of Hyundai vehicles with similar engines have reported comparable issues. This suggests a widespread defect in the engine design or manufacturing process. I am requesting the NHTSA to investigate this matter further to determine if a recall, warranty extension, or other corrective action is necessary to address this issue. Hyundai should be held accountable for resolving this problem, especially since it compromises the safety and reliability of the vehicle. Vehicle Information: Year: 2017 Make: Hyundai Model: Tucson SEL Engine: 2.0L VIN: [Your Vehicle Identification Number here] Thank you for your attention to this matter. I hope for a prompt investigation and resolution to ensure the safety of all Hyundai Tucson owners.

NHTSA ODI 11631032

The contact owns a 2017 Hyundai Tucson. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact stated that the oil level was extremely low. The contact added oil and stated that frequent oil changes were needed. There was no indication of an oil leak. While driving over a bridge, the vehicle failed to accelerate over 25 MPH. The check engine and oil warning lights were illuminated. The contact stated that the failure was related to NHTSA Campaign Number: 21V727000 (Engine). The vehicle was taken to an independent mechanic, who determined that oil was being burned by the piston rings. The vehicle was taken to the local dealer, who performed an oil consumption test. The dealer informed the contact that there was an oil leak. The vehicle then failed to start. The vehicle was not repaired. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 70,000.

NHTSA ODI 11629568

2017 Tucson no engine light came on no oil gauge light came on.Never received engine recall notice but engine rod bearing rubbing .Car is now Un drivable as it needs new engine

NHTSA ODI 11629189

See attached document for complaint.

NHTSA ODI 11629230

Under 40,000 took vehicle in to check because of hesitation when accelerating. They checked and could not duplicate issue so sent me on my way. Reached 70,000 and hesitation is worse. Getting and merging on highway, turning from stop, and feels like it’s going to stall when going up inclines. No incident yet just notifying maybe something wrong with other peoples.

NHTSA ODI 11628084

The rear driver's side door will not open, neither with the remote nor manually from both the inside and outside. Without enabling rear passengers to exit the car during an emergency is very much a safety issue. No warning lamps or messages.

NHTSA ODI 11627537

I was driving on [XXX] and the acceleration just started to drastically slow down. I was able to get to the shoulder where the car completely died and wouldn’t cut back on and I had it towed to South Bay Hyundai in Torrance. They said it’s engine failure but they haven’t completed the full inspection yet. I have been using Uber and need a car rental because I can’t afford to sustain this huge inconvenience indefinitely. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11626824

All of the lights on the dashboard and check engines light were illuminated. The speedometer would not work and the stick shift would stick in park causing me to have to release the shift lock manually to drive. The failure mileage was 59,450.

NHTSA ODI 11626342

My transmission has failed fully. It cannot even reverse. I took my car into Hyundai several times to check on the issue and they said the same thing, that the transmission slipping is a standard issue for dual clutch. I told them over and over that this is different. I did some research as to how to have them cover it and have it changed but the dealership said nothings wrong. Fast forward and now my cars transmission is fully gone and it probably won’t be covered when I know that it should have been part of the recall ! Just this year I’ve spent $5000 on repairs for this vehicle and now I’m looking at another $5000 for only a 7 year old vehicle. If that does not constitute a lemon I don’t know what does.

NHTSA ODI 11626179

The engine developed a knocking sound at 97,018 miles. When it was checked, it did not have any oil in it at all, regardless of there not being an oil leak in the system. The car received regular service. When we took it to Hyundai they did a test and confirmed that it was burning oil. This engine malfunction put my [XXX] daughter, the primary driver, at risk for engine failure while driving it. The engine light and knocking sound happened with no warning. Yes, the problem was confirmed by the Reed Hyundai of Kansas City. They told us that the car needs a new engine and that they bear no responsibility for the malfunction. The engine lights and sounds happened simultaneously. The vehicle was immediately stopped and towed to the dealership. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11626014

The car suddenly stopped accelerating. There were no signs that something was wrong prior. I was driving on the highway when I felt a loss of power, then my check engine light started blinking. The car entered “limp mode” and the engine started knocking. The code it was showing was for a knock sensor, I replaced that and it still would not accelerate. There is something wrong with the rod bearings and I was told by the dealership that this is a common problem with the type of engine they use in these vehicles.

NHTSA ODI 11626016

In August 2024, the engine of the vehicle suddenly started making a very loud knocking noise, with no previous warning lights. We did not feel it was safe to drive. We saw online that a recall was underway by Hyundai for 2017 Tucsons due to problems with the rod bearings, where metal spreads throughout the engine. There is the potential for the engine to catch fire, and a complete engine replacement is recommended. This was confirmed by the dealership where we bought the vehicle, Boucher Hyundai of Waukesha, which told us they are replacing the engines in many of these vehicles. However, our VIN was not included in the recall, although the problem is identical to what is described in the recall. We had the car towed to the dealership; after confirming the problem, the dealership filed a claim with Hyundai seeking to add our VIN to the recall. We included all of the maintenance records since we bought the vehicle in January 2021 with 64K miles. Hyundai rejected the claim, citing a gap in the maintenance records from 64,000-124,000 miles. The dealership questioned that, since they had submitted our maintenance records and there were no gaps. Hyundai again denied the claim, citing a gap in the maintenance records from 17,000-29,000 miles - before we owned the vehicle. We called Hyundai customer service seeking an explanation; they said that the decision is made by Hyundai Motor America, a different entity, which only the dealership can contact, not vehicle owners. The customer service rep's only suggestion was to file a claim with your agency. The vehicle is parked and undriveable; it is available for inspection.

NHTSA ODI 11626066

Car is using an abnormally large amount of oil. I reported to Hyundai. They sent me to a Hyundai dealership for an Oil Consumption Test. They confirmed that I do not have an oil leak under the automobile. The dealer is telling me “it’s completely NORMAL TO BURN THROUGH 1 QUART OF OIL FOR EVERY 1,000 MILES”. That would leave my automobile with only two quarts of oil after driving 3,000 miles. The owner’s manual does not state any of this. Now I am paying a significant amount of money on Oil Consumption Tests of which they are telling me I might need several before they MIGHT fix the problem. This 2017 Hyundai Tucson is one of the models and years affected.

NHTSA ODI 11625991

The contact owns a 2017 Hyundai Tucson. The contact stated while driving at an undisclosed speed, the vehicle stalled with no warning light illuminated. The contact did not have to restart the vehicle. The vehicle was taken to the dealer where it was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 80,964.

NHTSA ODI 11625062

Engine light notification was not present before, during or after the complete engine failure of the vehicle while driving. Per dealership, they are unable to find a replacement motor and are going to rebuild the engine.

NHTSA ODI 11624487