It started [XXX] when i took my car to the dealership due to it going into limp mode. The dealership took it in and said it was throwing error code p1326 which is the knock sensor code. they replaced the knock sensor, drove my tucson home after the replacement, by the time i got home it went into limp mode again, took my car back to the dealership turns out it was a faulty sensor they received. So the dealership replaced the sensor again, did not have an issue with it until decemember 2023, so i took it to get the error code read again and it was the p1326, so i make an appointment with the dealership to bring it back in and they said hyundai of america says it needed the combustion chamber cleaning, which i had to pay for. even though it was throwing the p1326 error code. but after the cleaning is done i pick it back up and not even ten miles from the dealership my car goes back into limp mode, so i turn around and take it back. they just got back to me on [XXX] saying hyundia of america is declining to replace my engine since its no longer under warranty. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Thomaston, GA, USA

The car will jerk while driving. The problem was fixed last year and again it is happening now.Worse..the car while being driven will suddenly slow down inspite stepping more on the gas pedal.

- Las Vegas, NV, USA

While driving my car normally 9 dashboard lights came on suddenly including the check engine, ABS, brakes while at the same time the dials on the dashboard including the rpms, speedometer, oil temperature and more all stopped working. This happened suddenly while the car was in drive and also caused issues with the transmission as the car stopped shifting gears properly and was driving very rough. With this sudden onset of many different issues out of nowhere driving the vehicle was very dangerous when trying to get to a safe location. After parking this electrical issue would not allow me to take the car out of park or use a OBD reader do to the electrical issue. After researching this problem I found several reports online describing nearly identical symptoms all of the sudden resulting in the car being undrivable and in a dangerous state. These owners said they took the cars to the dealer who tried replacing several components without fixing the issue with hours of diagnosis charges. Eventually after having the vehicles for several days they replaced the reverse camera which it turns out was shorting a significant amount of other critical car electrical components. With no prior damage to the camera or these electrical components the abrupt and random onset of this issue pose a significant safety risk to Hyundai Tucson drivers (at least in 2016 -2018 models). My experience with the Hyundai Dealership was very similar to them even after I had diagnosed the issue to the camera the dealer said they had contacted the manufacturing engineers who took several days to determine what was causing these electrical issues. This is not an isolated issue as multiple hyundai tucson owners have reported this to Hyundai and their dealerships yet they fail to recognize the risks associated with the faulty cameras they install in their factories. They need to recall their vehicles prone to having this issue. This has cost me $1000 to fix and put me at risk on the road

- Newport News, VA, USA

Knock sensor recall was done in May 2022. Brought vehicle into service for Ac problem and oil change, which was completed. Was on highway going home 65 mph speed limit hit a hill, my engine light started flashing, my transmission downshifted and I lost all accelaration while on hill, speed wouldn-??t go any higher then 50 at that point. Got to closest gas station and had car towed back to dealership, I just want to point out that the knock sensor is going to put people in danger in certain situations like myself, I am not to happy.

- Greeneville, TN, USA

While driving the vehicle, while accelerating the vehicle would lose power or disengage from gas pedal at 17 mph and then again at 26 mph. After about 3 miles the check engine light came on and a TCM warning appeared on the radio screen. Immediately took the car to the dealership and was turned away since I didn-??t have an appointment. On my way home from the dealership I made a stop at a store. I reversed out of the parking spot with no issues. When I put the vehicle in drive, it would not accelerate. I could drive in reverse but not forward. Vehicle was towed to the dealership. Diagnostics revealed it was a failed TCM. Further research revealed this same issue occurred in 2016 models. How was this not fixed or prevented in later models?

- Alexandria, VA, USA

Same dual clutch problem as on 2016 Hyundai Tucson. Hesitates for several seconds prior to engaging which causes significant danger in oncoming traffic. I had this same problem with the 2016 and Hyundai continued to deny any known problems. Now there is a class action lawsuit regarding this issue. I traded my 2016 in for the 2018 to get away from the problem because I was so scared. Now I have the same problem with the new car. This problem is ongoing. Also I was coasting with foot not on the pedal and not in cruise control and the RPM's shot up to 4200 then down to normal, then back up to 2200 and then back to normal. Very scary. Had clutch engaged car would have shot forward into car in front of me. Dealer has acknowledged trouble with both problems and informed me that Hyundai has switched clutch manufacturers.

- Scottsdale, AZ, USA

When shifting gears, ie P to R or R to D or P to D, the car jerks / catches. Some have called it "turbo lag". it's definitely most noticeable at a dead stop. I have experienced this "lag" while backing up out of a parking spot and then trasferring to drive, as well as being at a dead stop at a stop sign / red light, and then accelerating. Both experiences have been in the city, highway, turning, and local roads. I don't know what has caused or what is causing this issue. Perhaps it's the torque converter? I bought this car new in Nov 2018 and have had this issue since Jan 2019. I have had other people drive my car and they have also experienced this issue. Other Hyundai tuscon drivers have also experienced this issue, and have discussed it at this website: Https://www.carcomplaints.com/Hyundai/Tucson/2018/transmission/will_not_accelerate.shtml

- Newport, NC, USA

The contact owns a 2018 Hyundai Tucson. On several occasions, while driving approximately 1 mph and attempting to make a left turn, the accelerator pedal was depressed; however, the vehicle failed to respond. The contact stated that the accelerator pedal was pumped 5-6 times before the vehicle responded. The vehicle was taken to faulkner Hyundai (11500 roosevelt blvd, philadelphia, pa 19116, (215) 673-7462) to be diagnosed and the contact was informed that the vehicle performed as intended. The vehicle was not repaired. The failure recurred three times. The contact stated that the failure only occurred during left turns. The manufacturer was not notified of the failure. The approximate failure mileage was 300.

- Feasterville, PA, USA

Once my brand new Tucson hit 500 miles on it, it suddenly unintentionally accelerates while my foot is already pressing firmly on the break pedal. The first time, it happened as I was approaching the peak of a hill. I was going 25 mph. My foot was already pressing on the breaks, anticipating the decline, when my car jolted forward and took off. My foot slammed on the breaks even harder, however I watched my speedometer hit 40 mph while simaltaneously, my RPM decreased to 1... (yes, down a hill.) for about 5-7 seconds the RPM and seppdometer would not increase or decrease once hitting 40 mph and 1 RPM. I had to lean over the wheel and slam my breaks to the floor before I regained control of the vehicle. Once this occurred, the car lagged, struggling to accelerate throughout the remainder of the drive (all flat roads). It is now day 5 of experiencing this, and it now occurs multiple times every time the vehicle is in motion, whether breaks are being applied prior, or not, regardless of the type of road I am on (flat, hill etc.) I was exiting a parking garage that had a mediocre ramp to exit the garage. My vehicle was going 12 mph when I turned right to proceed down the ramp. My foot slowly pressed the break pedal, and my vehicle accelerated to 28 mph, and maintained that speed for 3 seconds, before responding to my breaks. Yes, my foot had the breaks pressed all the way down. Another example, yesterday I was on a flat road driving at 27 mph when it suddenly accelerated to 45 mph, and the RPM dropping suddenly from 2, to 1. after a few seconds of my foot slammed on the breaks I regained control and pulled the car over. I turned the engine off and waited about 5 minutes. When I turned it back on, and began driving (3 minutes left in my drive), the car continued to lag, lunge forward, and could not reach speeds higher than 30 mph. This car is brand new.

- Ridgefield, CT, USA

The vehicle is experiencing severe intermittent failures to accelerate. Failures occurr from a stop and while in motion. All gear levels appear to be affected. Failures were first noticed at approximately 7000 miles.

- Cape Coral, FL, USA