My daughter and I have had this vehicle less than a year. Right away noticed high oil consumption. Not leaking on the ground. Started researching online and found that there have been complaints and a small class action lawsuit in CA. Talked to a couple local mechanics and they had heard of this issue. Suggested to use a higher quality oil to see if usage slowed down. Checked oil every week , filled aac needed, got regular oil changes. No real problems besides the oil usage.

March 15, 2024 my daughter is driving on a 4 hour trip to visit a friend and the Tucson shuts off out of the blue driving 70 mph. Gets on the shoulder without getting killed. Vehicle acting like battery is dead. I’m on the computer looker for roadside assistance and found one. A State Trooper stopped and told my young daughter about the same repair shop I found. They come with a tow truck and much of the traffic is still going 70 mph and not able to move over. My daughter has her best friend in the vehicle with a 5 month old baby. Very dangerous situation. Get towed a mile to shop. Mechanic charges the battery for an hour, alternator tests fine, belt was fine, battery terminals were fine. Battery charged up to 14.6 volts.

There was a Hyundai dealership about 40 minutes away. Her friend drove an hour to pick up the young mama and baby and my 20 yr old daughter starts driving to dealership. The Tucson is going 70 mph down the road and starts losing power going uphill. Slows to 55 mph. The young girls are both driving with their hazards on so they don’t get separated or killed by speeding drivers! Get the car to dealership and they promise to look at it Monday morning. They diagnosed the problem as a valve seal leak, that ruined the ignition coil, which caused a misfire and has restricted flow through the catalytic converter with particles, and of course the spark plugs are fouled. One of the service advisors said this diagnosis does not qualify for an engine replacement. I said I’m filing a claim anyway.

Looked at a vehicle to buy to see what they will offer for trade. We paid $15, 995 less than a year ago. The 2017 Tucson had 79k in mileage and now has about 93k. They came back with a KBB of $8300 and the salesman said values of vehicles really declined recently They offered us $4000 trade in. Balance on the loan is $14,000 and they want $7300 to fix the car. This is not acceptable!!,

THE CAR STARTED TO HAVE PROBLEMS WITH ACCELERATION, DOES NOT ACCELERATE MORE THAN 60 miles per hour and turned on the signal the engine and to get to 60 mph it goes slow little by little without strength since it only reaches 2000 rpm it does not go higher than that. In addition, all the lights on the blackboard came on, which means that I can't tell if there is something wrong with the car or not because everything is on.

The proximity sensors don't work, and I get the code for engine is P1326 and the anti-Lock Brake System the computer show the code C1211-02, C1207-02, C1210-02, C1208-02 Y C1209-01. I took it to the Hyundai agency in Miami Lake where I bought it and they told me that the car had 10 years or 100,000 miles of warranty and when I arrived the person who received me without passing the car to diagnosis or anything told me that repair costs you $700,00 and tells me that to my warranty covers the engine, the engine has to be completely damaged. I explained to her the engine was in bad shape that it was better to do the repair than to change an entire engine if it was still being used, but she was still in the same negative until she left.

I need to make this report because I didn't have any help from the Hyundai that sold me the car and which is still under a factory warranty. I consider this a violation and abuse of consumer rights by deceiving the American people with a guarantee that they then do not want to fulfill

Hyundai Tucson, 2.0L engine, 6-speed Transmission. Now there are 66,000m on the car. For the last 2 years I have always had a fraction of a second pause after pressing the gas pedal before car takes off. I reported this to Hyundai service 3 times and always the reply "because of the dual clutch". Jump ahead to 2 months ago, except at random times, usually when hot outside (ambient temperature) the car lacks acceleration from the stop (like it is trying to take off in 5th gear). At times I have heard rattling, knocking sounds in the engine.

Took it to Hyundai service again. They got approval from Hyundai corporate to replace the engine. Connecting rods making noise and car was using a lot of oil even though no signs of burning oil. Once engine was replaced I was still getting the lack of acceleration at times. Took it back and after investigating it some more Hyundai Corporate found the the Catalytic Converter to be the culprit. It was partially clogged inside. That was causing the lack of power at times due to heat and use of the car. When the catalytic converter gets blocked up or partially clogged it has to work harder and may not get rid of the emissions properly. It will cause engine problems.

Anyway, after 500 new miles of hard driving it runs like new again. In fact I do not have that split second lag anymore. Acceleration from stop is what it should be now.

So, people with the Tucson and lack of acceleration issues, go back to the dealership and have them check out the catalytic converter. I'll bet it is partially blocked. All this time I kept complaining about the transmission, because my symptoms were that at times the car seemed to take off in 5th or 6th gear which makes it slow to accelerate. The emissions warranty is for 8 years or 80,000m. For those that do not know about the Catalytic converter, do some research on it to find out why cars have them. You will be surprised at the problems they can be linked to. In fact Hyundai has got one of their repair bulletins about the Catalytic Converter.

I had multiple issues. Bad engine knocking, excessive use of oil, and lack of acceleration at times. I just wonder if the partially blocked Catalytic Converter caused the engine problems over a period of time. Possible.