Engine lost power suddenly on the highway. Vehicle entered limp mode and became limited to 45MPH and reduced acceleration.

- Mustang, OK, USA

Following the knock sensor detection system update, this car has a P1326 code that forces it into limp mode. Occurs during moderate-hard acceleration, e.g. getting on a highway. The car is limited to -??2000 RPM and -?? 45 mph, and rapidly decelerates to that speed if necessary. Acceleration is very limited. This occurs roughly every two weeks, despite having a brand new sensor installed by Hyundai. Hyundai has also allegedly performed cleaning on the sensor and related parts. This has been going on since November, when the recall that installed this update was performed.

- Mustang, OK, USA

am submitting a safety complaint regarding my Hyundai vehicle due to repeated engine power loss (limp mode), excessive oil loss, and a denied engine recall replacement. I initially brought my vehicle to the dealership after experiencing engine power loss/limp mode, engine oil loss, and illuminated check engine warning lights. The dealership confirmed that my vehicle was covered under an engine recall and stated that the recall procedure was completed. As part of this process, the dealership performed an engine combustion-related service and charged me approximately $1,600. After this repair, I drove the vehicle for approximately 1,000 miles. When I returned the vehicle to the dealership, the vehicle entered limp mode on the same day it was brought in, and the check engine light was illuminated again. The dealership advised me that the vehicle had lost an excessive amount of engine oil during the 1,000-mile period. Due to the continued engine issues and oil loss, the dealership requested a full engine replacement under the recall. However, Hyundai denied the engine recall replacement request. The vehicle-??s repeated loss of power, excessive oil consumption, and limp mode create a serious safety concern, especially while driving at normal road speeds. I am concerned that the recall remedy was ineffective and that the denial of an engine replacement places drivers at risk. I am requesting that NHTSA review this matter for potential safety defects and improper handling of a known engine recall issue.

- Simpsonville, SC, USA

The contact owns a 2017 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to two independent mechanics, and DTC: P1326; was retrieved. The vehicle was not repaired. The contact was advised not to drive the vehicle and to have the vehicle towed to the dealer. The vehicle was towed to the dealer, and the contact was informed that a diagnostic fee would be charged. The contact stated that the TSB: 21-01-023H was performed in February 2025. The dealer was informed that the same failure had occurred. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 92,200.

- Hampton, VA, USA

Engine is burning oil causing the catalytic converter to clog and fail. Hyundai dealership told me after I had the car towed to them for repair on 12/30/2025 that the catalytic converter had already been replaced before in March 2024. I had purchased the car from another dealership March 2025 and the catalytic converter replacement was not on the car fax. I was also I formed by the Hyandai dealership that my car has an extended warranty of 10 year/150,000 miles on the engine due to the known oil consumption issue. My car has 131,000 miles. I was told Hyandai will make it very difficult for engine replacement since I-??m a second owner. There needs to be a recall immediately.

- Charlotte, NC, USA

The contact owns a 2017 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, an abnormal pop sound could be heard coming from the engine. The oil warning light was illuminated. The contact was about to merge to the side of the road when the contact noticed a glow on the underside of the vehicle. The contact then pulled into a parking lot, smoke was emitting from under the hood, and entered the vehicle through the A/C vents, and noticed the flames under the hood. The contact stated that the heater was turned on, and the contact immediately turned off the heater. The contact opened the hood and used a fire extinguisher to extinguish the flames. The fire department was called to check the vehicle to make sure the fire was extinguished. The fire department used a thermo reader to make sure that there was no more risk of a fire. The vehicle was towed to the residence. The contact towed the vehicle to the dealer, where it was diagnosed that the engine had failed. The contact was informed that the vehicle had an open recall pending: NHTSA Campaign Number: 21V727000 (ENGINE). The dealer informed the contact that since the recall was not performed, the engine had failed. The contact stated that he was the second owner and that the vehicle was purchased in 2022. The contact was unaware of the recall at the time of purchase. The dealer refused to complete the recall repairs. The vehicle was not repaired. Most recently, the contact was informed that the connecting rod failed and punctured the bottom end of the engine. The vehicle remained at the dealer unrepaired. The manufacturer was made aware of the failure and denied the recall repairs. The failure mileage was approximately 107,000.

- Fountain, CO, USA

severe oil consumption. the vehicle eats the oil at an alarming rate. having to fill the oil tank very often and the engine light has been on. it is affecting acceleration at 30mph where the engine warning light will flash. It also completely dies while driving. very unsafe and needs to be resolved.

- Mcallen, TX, USA

I purchased a CPO 2017 Hyundai Tucson in June'22 and brought it in for engine stuttering, the car stalling in intersections and was told they couldn't duplicate the problem. I emailed and brought the car in again and still noting was rectified. I've made the oil changes, changed spark plugs, flushed the engine in July and got new oil and everything looked at and in October the engine seized while my husband was driving to work: no oil lights on no engine lights on. Neither Hyundai or the extended warranty will help. My VIN didn't come up in a recall but there's too many problems with other 2017 I would hope they'd look again and help their customers.

- Lakewood, CO, USA

I-??m submitting this complaint to report what appears to be a serious safety-related engine issue in my 2017 Hyundai Tucson Sport 2WD with the 1.6L DI Turbo engine [T-GDI GAMMA]. I-??m aware of NHTSA Recall 21V-727, which covers 2017 Hyundai Tucson models with the 2.0L engine for premature engine bearing wear. The symptoms covered by that recall are nearly identical to the symptoms my vehicle is now showing. My VIN shows no open recalls or service campaigns on Hyundai-??s website, but the problems I-??m experiencing match those found in many other consumer reports for this same year, make, and model. My vehicle has only 80,000 miles and has had regular maintenance. Examples include loud knocking from the engine that rises and falls with RPM, and metal shavings in the oil. One complaint that reflects the same pattern can be found in NHTSA ID 11680114, which describes engine knocking and metal debris with no warning lights or alerts. My vehicle has also shown no warning indicators. These issues pose a safety risk because they can lead to sudden engine failure while driving. Based on the volume of similar complaints and the overlap with the existing recall, I-??m concerned that the defect may affect more than the engines currently covered under 21V-727. I-??m requesting that NHTSA review this matter and determine whether Hyundai should extend or expand the recall to include vehicles equipped with the 2017 Hyundai Tucson Sport 2WD 1.6L DI Turbo DOHC 4cyl. Please investigate this issue and hold Hyundai accountable if these defects extend beyond the vehicles already listed.

- Mesa, AZ, USA

The 2017 Hyundai Tucson I owned had the engine FAIL (internal bearing failure) rendering the car basically worthless. Hyundai has multiple recalls on this type of engine. My car had 120,000 miles when the engine failed. Hyundai REFUSED to offer ANY assistance on this, fully knowing that these engines have had thousands of problems in Australia and the US. This is a problem they KNOW exist and they are doing nothing!!!! They need to admit the problems and help consumers when this happens instead of trying to WEASEL out of any responsibility. Thanks.

- Neenah, WI, USA

I am writing regarding a serious incident involving negligent automotive service performed by Jiffy Lube Store #687. On October 24, 2025, I took my 2017 Hyundai Tucson to this location for a standard oil change. I trusted that the service would be completed properly and safely. However, on November 21, my vehicle-??s oil lamp unexpectedly illuminated. Concerned, I returned to Jiffy Lube on November 22, where employees informed me that they had -??sealed the small leak and topped [my] oil, -?? adding that I was entitled to two top-offs between oil changes and -??should be good for two weeks.-?? Tragically, the very next day, November 23, the oil lamp flashed again. My vehicle then shut off while I was driving, with my children in the back seat. This was a frightening and dangerous situation for all of us. I am now left confused, stressed, and unsure of the full extent of the damage.

- Cockeysville, MD, USA

- Kept regular 5K-6K oil changes since 2022 when I purchased the vehicle -Took the vehicle to a Hyundai dealership, multiple times, to ask about the engine stalling at a stop or slow turn, and/or jerking. -July '25 new oil change and flushed engine -October'25- no engine or oil lights. Engine seized and needs to be replaced. - VIN didn't populate recall but the symptoms are the same

- Lakewood, CO, USA

Component/system: Engine / powertrain -?" excessive engine oil consumption. The original engine is still in the vehicle and is available for inspection upon request. On 11/7/2025 my dealer (Ourisman Hyundai in [XXX] ) added 2 quarts of oil at 90,999 miles after the dipstick showed a very low level. After that visit, we drove approximately 713 miles (mostly highway, including a college visit trip), and the oil level again dropped close to the same low point on the dipstick. On 11/22/2025 at 2:10 PM, with mileage at 91,815, the dipstick again showed a significantly low oil level. I am concerned that this abnormal oil consumption could lead to sudden engine failure or loss of power while driving at highway speeds, putting my family and others on the road at risk. This vehicle is used regularly for my daughter-??s college visits and everyday transportation. The dealer has acknowledged the concern, previously performed a combustion chamber cleaning on 8/11/2025 (Invoice #XXX), and has submitted a request to Hyundai for assistance. However, a formal oil consumption test or official diagnosis has NOT yet been completed, so the exact cause is UNKNOWN. The vehicle has been inspected by the dealer, and Hyundai Motor America has opened a case, but there has been no final decision or repair yet. There have been no warning lamps or messages on the dashboard; the only symptom has been repeated, excessive oil loss between visits, verified by multiple dipstick and odometer photos. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Washington, DC, USA

Sensors something to do with the motor and not sure where the other sensors is related to could be the motor as well. The safety was not good due to it shut off in the middle of traffic and making wraddling noise. I took the vehicle to the dealership where purchase from. They have done nothing besides fixed one thing that I know of supposed to been the surpension. But the other problems was not fixed No it has not been inspected by anyone The warning lamp come on and just blinking none stop

- Statesboro, GA, USA

My 2017 Hyundai Tucson is experiencing severe oil consumption, which appears to be related to a known manufacturing defect affecting Hyundai engines from this period. My vehicle is burning through oil rapidly between normal oil change intervals, and it has begun showing signs of low oil levels despite no external leaks. This creates a serious safety concern because the engine can fail without warning. The dealership has acknowledged that excessive oil consumption is a known issue for this engine but refuses to provide assistance because I do not have -??enough oil change documentation-?? over the years. However, this issue is not caused by lack of maintenance -?" it is a widespread internal defect that Hyundai has issued multiple technical service bulletins for. My car has been maintained, and oil changes were performed at regular intervals, even if I do not have complete paperwork. The rapid oil burning is ongoing and dangerous. I am concerned about the engine seizing, stalling, or failing while driving, which could lead to a crash. This is a safety hazard that should be investigated and included with other Hyundai engine cases. Requested Action: I am asking NHTSA to investigate this oil consumption defect affecting the 2017 Hyundai Tucson and require Hyundai to provide a remedy, including repair or engine replacement, regardless of perfect maintenance documentation, since this problem stems from a manufacturing flaw.

- San Dimas, CA, USA

vehicle is burning through oil.

- North Providence, RI, USA

I know there is a re-call for my vehicles engine and year with model. I am having serious issues with my vehicle related to the recalls for the same year and model. I feel unsafe driving my vehicle and now I do not know what to do.

- Greenwood, IN, USA

I recently purchased vehicle and when checking recalls from my local Hyundai dealership I was advised that there was two previous attempts to have engine replaced due to knocking and it was denied this recalls is the 209 I escalated to Hyundai corporate and after taking to a Hyundai dealership and paying for a diagnostic test they advised car doesn't have oil pressure and the oil pump needed replaced and Hyundai corporate denied repairs saying this didn't pertain to recall 209 because my engine is a 1.6 liter and it was ok only to the 2.0 engines, I would like to report this and ask for help please.

- Sand Springs, OK, USA

Oil consumption problem caused vehicle to go into Limp Mode on freeway. Manufacturer states 1qt loss every 1000 miles is acceptable.

- Circleville, OH, USA

Burning oil. More than a quart every couple hundred miles sometimes much more than that. Very bad burning oil smell coming from engine into the inside of my car. I feel sick everytime I drive from breathing in fumes. Need oil consumption test asap

- Lasalle, IL, USA