2,448 of the
8,589 complaints filed about the Hyundai Tucson
are about the engine —
29% of everything owners reported.
The worst model year for it is 2017.
The contact owns a 2020 Hyundai Tucson. The contact stated that while the vehicle was receiving a routine oil change, the contact was informed that the oil pan was empty. The contact was advised to take the vehicle to the dealer. The contact was informed about a possible oil consumption test. The contact was informed that there was carbon blowing out of the vehicle. The contact stated that three months later, the oil pan was empty. The vehicle was taken back to the dealer, and engine oil was added; however, the failure reoccurred. The vehicle was taken back to the dealer where the contact was informed that the engine needed to be replaced. The vehicle was repaired. The contact stated that while driving at an undisclosed speed, the contact heard an abnormally loud sound. The vehicle was taken to the dealer where the contact was informed that the bolts for the driveshaft were missing. The contact was informed that the bolts needed to be replaced. The vehicle was repaired. The contact stated that the dealer was negligent when the engine was replaced and the bolts to secure the driveshaft were not properly installed. The contact stated that the negligence needed to be reported. The contact was later advised by an associate to take the vehicle back to the dealer and requested an overall inspection of the driveshaft. The vehicle was taken back to the dealer, and the inspection was completed. The contact was informed that the vehicle had passed the inspection. The manufacturer was not made aware of the failure. The failure mileage was 80,000.
NHTSA complaint #11758267 — an unverified report by a vehicle owner.
I bought my 2012 Hyundai Tucson from a used car dealership back in November of 2024 . When I bought the vehicle it only had 55,000 miles on it and came with a 2 year unlimited mile warranty on the drive train and a full Carfax history in which everything came back clean , regular oil changes with synthetic oil every 4,000 miles and for my warranty through the used car dealership requirements I have continued to honor the every 4,000 mile oil change with synthetic oil every time . I have my Carfax that shows that my vehicle was brought to a certified Hyundai dealership back in 2019 for maintenance and the dealership never applied the required KSDS software update to extend my warranty. Flash forward to 8/06/2026 my vehicle with only 94,000 miles on it is sitting at a Hyundai dealership with the engine blown . I filed a claim with Hyundai and of course they denied it . I filed a complaint with corporate because it was at a certified Hyundai dealership back in 2019 they have had the updated KSDS software available at the time knew that it was a requirement for the extended warranty and didn't add the software update to my vehicle. I have asked for a good faith gesture and was also denied . I'm on a fixed income with a disabled husband and a disabled son . I still owe a considerable amount on the vehicle since I've only owned it for 1 year 7 months . The used car dealership I bought it from will only cover up to $2,900.00 of the repairs and the new engine is costing me $7,601.01 . Leaving me with a remaining bill of $4,701.01 . While that's pennies to them to me that's 4 months rent and my family not eating for 4 months . . I even tried to work with them to split the cost and again was denied . They know their 2.4 theta engine is inferior and was court ordered to extend their warranty. I was informed when I brought it to the dealership that is fixing which is also a certified Hyundai dealership that it has 4 open recalls attached to my vehicle that needed to be fixed
NHTSA complaint #11757815 — an unverified report by a vehicle owner.
My 2018 Hyundai Tucson with the 2.0L engine has suffered catastrophic engine failure. The engine lost compression in cylinder 4 and now requires a full replacement . This is part of a broader pattern—the 2016–2018 Tucson is known for excessive oil consumption that leads to engine failure, with over 1,900 engine-related complaints filed with NHTSA across these model years . Prior to this failure, I reported excessive oil consumption and other engine issues to my dealership. Despite these reports, the problem was not resolved, and I was given inadequate guidance on how to address it. The engine ultimately failed while I was driving, creating a sudden loss of power that posed a safety risk. Other Hyundai Tucson vehicles with the same engine have been covered by recalls for related engine defects , but my specific VIN was not included, despite exhibiting identical symptoms. Meanwhile, other owners report that similar engine failures have been dismissed or denied coverage by Hyundai . This inconsistency in how the manufacturer handles a known, widespread defect is what prompted me to file this complaint.
NHTSA complaint #11757350 — an unverified report by a vehicle owner.
I keep having to add oil but there is no puddle from a leak on the ground. There is also no smoke coming out of the exhaust. It is using an excessive amount of oil.
NHTSA complaint #11757176 — an unverified report by a vehicle owner.
The contact owns a 2022 Hyundai Tucson. The contact stated that the check engine warning light illuminated and was cleared; however, the warning light returned hours or days later. The dealer had cleared the check engine warning light approximately 15-16 times. The vehicle occasionally stalled while driving at various speeds. The dealer diagnosed the vehicle with terminal engine failure. The contact was informed that the fuel system needed to be overhauled, and the fuel injectors and caps needed to be replaced. The vehicle was repaired twice. The failure persisted after the contact had confirmed the diagnosis with a certified mechanic. The vehicle was returned to the dealer, who replaced the engine. The vehicle was parked for several hours, and the contact attempted to turn on the headlights, but the headlights failed to illuminate. While driving the vehicle, the vehicle hesitated several times. The following day, the vehicle failed to start approximately four times. The vehicle was driven to the dealer but hesitated several times along the way and failed to start once at the dealer. The dealer diagnosed the vehicle and determined that the battery and other parts needed to be replaced; however, the vehicle was not repaired. The manufacturer was made aware of the failure, and a complaint was filed. The failure mileage was 3,212.
NHTSA complaint #11756964 — an unverified report by a vehicle owner.
On Thursday, August 6, 2026, while driving my 2018 Hyundai Tucson on Interstate 81, the vehicle experienced sudden, severe engine vibration and a loud metallic ticking sound before losing power and stalling completely on the highway. I was stranded on the side of the highway in a high-speed traffic zone, creating an immediate and hazardous safety situation. Because the vehicle was completely inoperable, I was forced to pay $200 out-of-pocket to have the vehicle towed 35 miles to the nearest authorized Hyundai dealership service center. Upon arrival at the dealership, an on-site service technician performed an OBD-II diagnostic scan on the lot and confirmed diagnostic trouble code P1326 (Engine Knock Sensor Detection System / Connecting Rod Bearing Failure). Despite the technician confirming the presence of this critical safety defect, the dealership service desk explicitly refused to enter the diagnostic code into Hyundai’s corporate system, stating they would not process or submit the vehicle for inspection or warranty authorization for over a month. Hyundai Motor America Customer Care was contacted immediately and witnessed the dealership’s refusal to log the safety defect. While Corporate assigned a Case Manager, Hyundai and the dealership have continually stalled the intake process under Service Campaign 966 / T6G and refused to provide direct-bill rental transportation or loaner support while the car sits disabled on the dealer lot. As a direct result of this sudden highway engine failure, the manufacturer's failure to address a known safety defect, and the refusal to provide recall mobility support, I have suffered ongoing financial loss, out-of-pocket towing expenses, and forced leave from employment. I am filing this report to document the hazardous highway failure of code P1326 and the refusal of the manufacturer and dealer to process a critical safety recall intake in a timely manner. My husband is the registered owner but I am the driver.
NHTSA complaint #11756421 — an unverified report by a vehicle owner.
The contact owns a 2021 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the engine blew. No warning lights were illuminated. There was white smoke coming from the hood of the vehicle. The vehicle was towed to the dealer; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 7,800.
NHTSA complaint #11756204 — an unverified report by a vehicle owner.
We have a 2015 Hyundai Tucson that we bought brand new. It has 80k miles on it. The car started using oil about three years ago. The dealer recommended replacement of the catalytic converter, which we did. The car continued to use oil, and the dealership had us replace the catalytic converter two more times, so three times total. Now the problem is occurring again and they are recommending replacement of the catalytic converter for a FOURTH time. We have filed a claim with the manufacturer and have been going in circles with the dealership for months. It is our position that the repeated catalytic converter failure is caused by an underlying motor issue, which should be covered by the manufacturers warranty, but the dealer treated the symptoms instead and waited for the warranty expiration. This car is owned by my father, an [XXX] disabled veteran. He bought this car thinking it would be a safe and reliable vehicle for him to drive into his retirement years. Instead, Hyundai is repeatedly making him pay to replace the same part when it is clearly not resolving the oil consumption issue. He is being taken advantage of. Hyundai should honor their warranty. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11755592 — an unverified report by a vehicle owner.
The contact owns a 2017 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the vehicle was shaking and vibrating abnormally, and the engine was making abnormal sounds. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, and an oil change was performed as associated with NHTSA Campaign Number: 21V727000 (Engine); however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 97,000.
NHTSA complaint #11753739 — an unverified report by a vehicle owner.
Vehicle suddenly slipped into limp mode. Vehicle was then immediately taken to have code read. Code came back P1326. Was advised due to previous recall campaign(s) to contact Hyundai of America for guidance. Was told that vehicle needed to be confirmed per the BCT at any Hyundai dealership to which the agent scheduled the appointment myself and that i should get the other 4 recalls fixed as well. My spouse drove the vehicle there and that was our last true communication verbally with Hyundai of America. Vehicle barely made it to the dealership and then spouse was offered a ride home an hour and a half later without paperwork or any type of understanding other than it would take time for the service team to get it on the BCT. A week later I was told it would cost $250. We have argued that we were never told it would cost anything as it relates to this major recall nor the others and in fact it would be performed at zero cost. Then, a service manager stated that now the vehicle needed $10k worth of work and began having finance firms contact me that he said were employed by Hyundai but are not. Here we are a month later, and still no vehicle and we have contacted Hyundai of America numerous times and have all communications regarding such contact and have gotten nowhere. We have yet to actually speak to someone over the phone. We were assigned a case manager who is now on vacation. We're without an income now because after not having transportation to work my partner has lost his job, and we are in dire condition. Inside of my vehicle that this dealership is holding hostage is my infant’s car seat and a brand new catalytic converter. They have refused to communicate with me and supposedly with this case manager according to her emails. We are in need of help.
NHTSA complaint #11753637 — an unverified report by a vehicle owner.
While stopped at a traffic light, the engine began producing a loud metallic clattering and clanking sound, consistent with connecting rod bearing failure (rod knock). There was no prior warning light or indication of this specific failure. When the light changed, the vehicle would not accelerate normally, leaving me stalled in a lane of moving traffic. I was forced to make an emergency turn to get the vehicle out of the way of oncoming and crossing traffic. The engine would not hold an idle afterward and has not run since. The vehicle was towed to a Hyundai dealership, where a service department employee stated by phone that this 1.6L turbocharged engine family has a known, documented history of severe factory defects affecting the connecting rod bearings.
NHTSA complaint #11753197 — an unverified report by a vehicle owner.
The engine lost power while driving, and the vehicle entered a reduced-power mode. The check engine light began flashing, and the engine made a loud knocking noise during acceleration. A diagnostic scan showed code P1326 (Knock Sensor Signal Range/Performance). The knock sensor was replaced, and the engine oil was refilled after discovering an oil leak. The vehicle operated normally for a short time, but the same symptoms returned. The vehicle is available for inspection. The vehicle suddenly lost power while traveling approximately 70 mph on the highway, making it difficult to maintain speed and safely keep up with traffic. This created a risk of being struck by other vehicles or causing an accident. The problem has since recurred during normal driving. The problem has been reproduced multiple times. A diagnostic scanner consistently identified code P1326. The knock sensor was replaced and the engine oil was replenished, but the same symptoms returned after several trips. The vehicle has not yet been inspected by a Hyundai dealership. The vehicle has been inspected by the owner and a family mechanic who replaced the knock sensor and identified an engine oil leak. It has not yet been inspected by Hyundai, law enforcement, or an insurance representative. There were no warning lights or messages indicating low engine oil or an oil leak before the failure occurred. I had the engine oil changed approximately one month before the incident. While driving on the highway at approximately 70 mph, the vehicle suddenly lost power, the check engine light began flashing, and the engine started making a loud knocking noise. After inspecting the vehicle, we discovered it had an engine oil leak and the oil level was low. Before the loss of power, there were no warning signs that the engine was losing oil or that there was an oil leak.
NHTSA complaint #11753365 — an unverified report by a vehicle owner.
The engine has been consuming oil, where we were adding at least a quart of oil between oil changes. We noticed the vehicle would shake like it was going to die while idling at a stop light or in a drive through. Recently my husband was driving home from work on a busy highway and the vehicles check engine light started blinking on and off. He pulled over and had the vehicle towed. The oil consumption made the vehicle throw a rod and damage the engine. Now we are needing to replace the engine.
NHTSA complaint #11752813 — an unverified report by a vehicle owner.
Car was driving weird Consuming lots of oil Check engine light flashing Took to mechanic where they replaced the spark plugs and ignition coils, cleared light. Issue was resolved for about a month. Rough idling began car begin to shake while driving. Took back to shop was told rod bearring problem. Upon research found out this is a COMMKON problem among Hyundai vehicles however my vehicle was not apart of the ‘affected batch’. Took to Hyundai and got a diagnostic where it was confirmed that a new engine was needed, for $9000.
NHTSA complaint #11752751 — an unverified report by a vehicle owner.
Incident Summary: On 07/16/2026, my 2018 Hyundai Tucson experienced a severe engine failure resulting in sudden knocking sound from engine and stopped in middle of road. This sudden failure while operating the vehicle created an immediate safety risk on the roadway. The vehicle was taken to Rick case Hyundai on 07/22/2026 , where diagnostics confirmed on 07/24/2026 internal engine damage tied to connecting rod bearing wear—a known, widespread safety hazard affecting Hyundai 2.0L Nu GDI engines. Reason for Complaint: Hyundai Motor America denied warranty coverage and engine replacement, claiming that Service Campaign 966 / Knock Sensor Detection System (KSDS) software had not been installed prior to the failure. The KSDS update is a software monitoring/warning tool, not a mechanical fix or routine maintenance requirement. Missing a software patch does not cause physical connecting rod bearing failure. Hyundai is using missing software updates to systematically deny coverage for known, dangerous engine defects. I am reporting this incident because sudden engine stalling on public roads poses a severe crash hazard, and Hyundai should not be permitted to avoid addressing safety-critical mechanical failures based on procedural software campaign exclusions.
NHTSA complaint #11752633 — an unverified report by a vehicle owner.
The vehicle developed an intermittent but potentially dangerous engine control malfunction. After the engine reached normal operating temperature, the engine speed (RPM) would repeatedly surge while the vehicle was stopped in Park and Neutral, fluctuating from approximately 1,000 RPM to over 3,000 RPM without any throttle input from the driver. The condition occurred with the air conditioning turned off and could be reproduced multiple times. At approximately the same time, the Auto Start/Stop system stopped functioning and displayed a warning indicator. A malfunction indicator lamp (check engine light) also appeared during the incident. The warning light later turned off, but the engine surging continued. This unexpected increase in engine speed raises concerns about unintended vehicle movement or loss of driver control if the condition were to occur while shifting into gear or while driving. The unpredictable nature of the malfunction presents a potential safety risk to the occupants of the vehicle and to others on the road. The vehicle has been taken to an authorized Hyundai dealership for diagnosis and repair and remains under inspection. The problem is available for inspection. During my research, I found numerous reports from other Hyundai owners describing similar engine surging, idle fluctuation, and Auto Start/Stop malfunctions involving comparable vehicles. Because similar complaints appear to have been reported by multiple owners, I am submitting this report so the issue can be evaluated for a possible broader safety defect. I have videos of the incident
NHTSA complaint #11752416 — an unverified report by a vehicle owner.
I was driving on the highway going 65 mph and scared when the engine started clicking and shaking a tiny bit. Plus it was slowing down no matter what i did. Well in a 4 lane highway. There was No engine light, no previous issues. The car drove great until this issue. I had the car only 3 months. Now i am afraid to drive it because i had seen theres an engine recall online for my car. Once i saw the recalls i tried calling alot of my local Hyundai dealer ships and they denied me because of the mileage.when i bought the car it was at 180 mileage. At this point i am not sure what to do with the car, i am hoping it can get fixed.
NHTSA complaint #11751801 — an unverified report by a vehicle owner.