Hyundai Sonata

"Driver side window control did not function properly. Window would stick."

"Driver side window intermittently inoperable along with keyless entry intermittently inoperable"

"I may have to press couple of times for it to activate"

"Cruise control stopped working. When I changed the car battery it began working agsin. Also sometimes radio does not work."

"Many of the accessory lights had to be replaced"

"Left front marker light does not work even after replacing the bulb twice"

"Stop light switch required replacement 6 times prior to 85,000 miles. Brake lights on continuously even when car is off"

"back shelf break light"

"Fuel gauge is off by 1/4, ie. 1/4 = empty"

"Both headlights just died just like that and i had to use high beam until it was fixed. Hyundai dealers charged total 120$ for the fix. which seems a lot of just headlight"

"needed to replace one"

"We have had to replace the headlights frequently"

"Internal headlight assembly electrical connections are loose and causes safety lights to not turn on and to fail inspection."

"does not work"

"Wireless lock and unlock of two front doors is random. Irritating but not a deal killer"

"Key wouldn't turn in lock, so couldn't start car. Had to be towed twice to a dealer while traveling. Several people tried to start car (self, husband, tow person) but couldn't turn key. We were towed to a dealer each time,and by then, the car star"

"Faulty module caused the starter to continue trying to start the car while it was running. This resulted in burning out the starter, which needed to be replaced"

"tire pressure monitor light comes on every two months"

"The TPM light comes on and off"

"I replaced all on tire sensors once now need replacement again"

"The tire pressure monitor system has a fault and the TPMS light came on. I had the system recalibrated by the dealer but the warning light came back on. The issue seems to be tied to weather the light comes on in the winter and goes off in the summer. No idea why."

"TPM light has been on for a few years. It is still functioning because it does give me a low tire pressure warning when applicable. The TPM light is always on and it cannot be reset without taking in to a mechanic"

"Monitor alert on dashboard. Took a few trips to confirm as light was intermittent"

"It was always on. Replaced but problem recurred."

"Erratic behavior"

"TPMS warning light stays on"

"Wiper washer motor stopped working. Unhappy that the wiper washer motor is so expensive to to fix due to its location near the engine."

"Clogged filter/system means gas does not flow into the tank easily making filling up take a long time."

"I have gotten various codes on the dashboard and after trying 4 or 5 Fixes the gas caps seemed to have solved the problem."

"engine would surge without warning, then rpm's would drop so low the engine would almost stall"

"Needed cleaning"

"gas leak at injection rail"

"Fuel pump failed due to corrosion causing the the electrical wires and terminals stop working. Corrosion suspected to be caused by ethanol content in the fuel."

"All of the oxygen sensors went bad but they were rusted in so they couldn't be removed. We were told to take out the catalytic converter to replace them but it is rusted in also! All of this cheap metal needs to be cut out with a torch!"

"it just failed one day and car came to a complete stop"

"Dealer replace mass air flow sensor 14 days before warranty expired"

"check engine light on. Code reader sometimes also show the "O2 sensor" problem"

"dealer said these sensors were part of the problem"

"$800 charcoal filter required replacement"

"check engine light comes on. sensor needs replacing"

"Check engine light came on. Took the car to Hyundai dealership. Fuel vent failed. About $200 to have it replaced"

"both o2 sensors on one catalytic convertor were replaced"

"The check engine light came on over 1 year ago. Dealer found nothing wrong. Came on again. Found nothing wrong. Came on a third time , new mechanic found problem right away"

"Camshaft and crankshaft sensors went bad May 2017"

"Mapping sensor failure caused by an accumulation of gunk preventing it from working properly. It was fixed by using injector cleaner. It has been working well since."

"6 months ago , service engine light came on. code reader determined, one of three 0 2 sensors was at fault. new 0 2 sensor fixed the problem"

"marginal operation of 2 Oxy sensors"

"Had to replace filter which cost $800"

"Map sensor went bad"

"Check engine light on. I was advised due to oxygen sensor failure. Estimted cost $2,300. Did not replace sensor."

"The alternator needed changing due to it starting to leak oil, the engine was running rough, and dash lights were coming on."

"Battery died (may not have been properly charged, so unclear if defect in the car or battery or just user-generated problem)"

"replacement of failed battery"

"This vehicle needs new battery every 2-3 years"

"The battery terminals corrode easily leading to an eventual battery failure which required roadside assistance utilization."

"needed to have a new throttle body installed"

"Starter motor at 5 years needed to be replaced...yes right after the warranty was over. Hyundai did cover it"

"Replaced an ignition coil that caused the spark plugs to misfire."

"After driving the vehicle and then turning the engine off, sometimes the car will not start. Nothing happens when you turn the key. If you wait between 5 and 30 minutes, the car will start again. Incredibly frustrating"

"Car key would get stuck and sometimes was very difficult to turn the car on. I replaced the ignition switch"

"Ignitors (spark plugs) had to be replaced"

"Starter quit working repair was quoted at $620. We purchased an extended warranty and it cost us $100"

"cold not start. had to replace it"

"Engine starter was replaced by dealer"

"Starter failed (hard failure, it was not intermittent) and required replacement."

"the starter was replaced at 200,000 plus miles; the starter it replaced was installed at 102,000 miles and replaced the original starter. i can live with that."

"these problems are all related to the broken motor mount and the electrical problem at the starter (keyed) switch"

"Starter failed. This is the second time during the life of the car. The first time the 100,000 mile warranty covered the cost."

"starter failure"

"Randomly doesn’t start, starts after 5-20 tries, impossible to replicate in shop"

"Car AC was barely cooling. Needed to have AC compressor replaced."

"Compressor, evaporator, required replacement 3 times in less than 75,000 miles"

"Compressor did not cool car adequately in Florida. Weakened over time. Replaced compressor, same issue."

"This is the third compressor installed on the car. The current one is a NEW unit ( not remanufactured ) and it still is not cooling as it should. The prior unit was a remanufactured unit purchased from Hyundai dealer and lasted less than two years."

"The doors that channel air to the heat or AC were stuck so no heat came through. Had to replace the whole assembly"

"During the winter the drivers side air vent blew hot air passenger side blew cold air..... Bad air door actuator control"

"Blower motor went bad. Replaced it"

"The fan is always on and will not shut off. Usually it will blow whatever temperature of air it was set on last. However, recently it has begun blowing only hot air"

"the vehicle has dual zone climate and the device that controlled the mix went out. One side was hot the other cold. Now the motor was affected by a change in the cabin filter, fan is loud"

"Replaced AC condensing unit"

"Blowing cold on drivers side in winter"

"Needed replacement of Thermostat housing and radiator hoses"

"when i got it from the dealer is was broken, didnt know until i had to use it"

"Heat was delivered only to the passenger's side of the cabin, not the driver's side"

"System blows heat on driver side, but not on passenger side"

"heater will not totally shut off, always blows warm air"

"Driver side no heat of air conditioning, while passanger side does"

"No matter how high I set the temperature, the air won't blow hot. So it's very chilly riding in the car in winter. Also, the air takes a long time to cool down using the air conditioner and the air never gets very cold. Very disappointing. It's been that way since I bought it."

"I have a refrigerant leak for over a year. Due to the difficulty and expense of replace or fixing this part my mechanic recommends just adding more refrigerant every year."

"Car would not cool in spite of having the air conditioning on full while the outdoor temperature was only in the 80's."

"rear passenger door handle broke off when opening door (rarely used)"

"Driver side rear exterior door handle simple came off when attempting to open the door"

"We've had to replace three of the four entry latches on the car. The dealer has covered the cost of this - warranty"

"Both center console latches failed. Repaired under warranty"

"The link between the door handle and the latch broke. Hyundai replaced the door handle at our expense"

"Silver plastic covering driver's inside door handle peeled a few years ago, cutting my hand. It was replaced by dealer at no charge. Now it's peeling again. Visor won't stay up, is being held up by rope"

"Front and rear door handles on the drivers side both broke and had to be repaired"

"The latch on the consul compartment broke some time ago and the cost of repair was way too high to have it fixed."

"Rear door handle broke off. We rarely use the rear door, but it broke off in my wife's hand. It was very expensive and we had to have it painted at a body shop. Fuel door would not open with keyless entry and the door would not either."

"latches on center console storage compartments have broken, or don't work well."

"Paint has peeled off driver's door handle. It was repaired once, but then happened again. It leaves sharp edges that have the possibility of cutting my hand. Also, the sun visor will not stay up, and needs to be tied up. This causes a safety issue, because the visor can be difficult to pull out of its harness when faced with sudden sunlight, and is distracting. This choice doesn't appear in your list."

"The hood latch would not engage. Caused me to fail my safety inspection."

"Side view mirror knocked off when someone bumped into it - was difficult to have it reinstalled"

"Car locks itself when I have not locked it. Security horn goes off when parked in my garage. Trunk hatch opens when driving (has not opened all the way, but light is on) and i have to stop and close it. Also the trunk lid id very heavy to open"

"Both front power windows motor were replaced by dealer"

"3 electric window motors have failed due to plastic gear teeth being striped or sheered off"

"The window switches on the driver's door control panel for the driver's window and for the left rear passenger window seem as if the springs in the toggle switches have become disconnected. The unit has a very flimsy feel to it"

"Power Window mechanical failure"

"Both front window motors have to be replaced"

"passenger window wil not operate about 80% of the time"

"thre rough shifting occurs when the car is cold and starting up for the first time in the morning"

"same"

"Downshift is hard when cold"

"Downshift at 20 mph felt like brakes grabbing. Dealer reset the computer...no more problems"

"There was a "technical service bulletin" and the dealership fixed it for free"

"On cold mornings especially; before car is warmed up, it would jerk during downshift slowing or coming to a stop"

"They initially used software upgrades to eliminate the rough shifting then eventually replaced the knuckle and some other parts on the transmission. problem would go away for a while but as soon as the cold weather came it started up again. This went on for a number of years until the warranty ended. They never did fix the issue once and for all and since the warranty has expired they are suspecting the transmission will need to be rebuilt or replaced. I would have to pay for it. Why didn't"

"Rough down shift at first one or two stop signs warms up in real cold weather."

"When the vehicle is cold, and I have to slowdown or come to a stop the transmission down shifts roughly. After 10 minutes of driving, the car gets back to normal, no more rough down shifting. The colder the weather is the rougher the down shift is."

"when down shifting transmission cluncks"

"There was a "technical service bulletin" and the dealership fixed it for free"

"When the vehicle is cold, and I have to slowdown or come to a stop the transmission down shifts roughly. After 10 minutes of driving, the car gets back to normal, no more rough down shifting. The colder the weather is the rougher the down shift is."

"was grabbing and jerking and they had to call Hyundai even though I took it to the dealer to have the computer adjusted.. It started again 8 months later but they couldn't find the issue and so changed the fluid which seemed to help as of now"

"Known problem. When cold , downshift from 2 to 1 is hard bang shift. hyundai tried to reprogram and flush ; help regular shifting but not cold downshift. Fluid was flushed @ 40k before. Car is tough on fluid almost black every 30-40K"

"hard downshift in to 1st gear when engine is cold, any temperature transmission reprogramming necessary to fix problem"

"dealer had to reprogram setting on tranny 3 times all together within the past year"

"Rough shifting between 2nd and 3rd gear"

"Computer part had to be replaced"

"Car felt like losing power. Grayson Hyundai said bad computer. Replaced. Still losing power. Express Oil Change mechanic found left rear brake hanging up. Fixed brakes. Requested Grayson Hyundai to reinstall old computer. Refused saying old comp"

"The remote starting system broke twice, 2 different companies. Drained battery completely"

"Replace oxygen sensor"

"The Engine control module (ECM) needed replacement. Approximately at 225,000 miles"

"broken motor mount and electrical problem at the starter switch resulted in the failure of starter to disengage after the engine started running."

"Oil leaks from the valve cover onto the alternator & shorted out the alternator. I had it replaced, and the mechanic put extra thick gasket sealant to stop the leak. It happened again. Its a design flaw by Hyundai"

"Oil leaks spilled over in engine $$$$$ repair"

"SLOW LEAK UNDER CAR"

"Valve covers gaskets replaced, front and back. Under warrany"

"Timing Cover seal was broken, oil leaking"

"Hyundai dealer mechanic advised in Feb. 2017 at oil change(mileage 103,4460) that vehicle has incipient timing cover leak and oil pan leak. Hyundai dealer mechanic advised in April 2017 at oil change (mileage 108,527) that valve cover tube seals are leaking"

"It was actually a problem caused by the Hyundai service center. We took it in for maintenance and they forgot to retighten a valve and it ended up leaking oil in the engine compartment. We took it to another shop to fix. It's a great car but the service center (Vancouver Ford Hyundai in Washington) is a bunch of crooks. They gaslit me and told me I was imagining the problems they caused and gave us no consideration (money off or compensation or even a sincere apology) after their error was discovered by a different shop, which we had to pay to fix it. I don't know more about the specific leak because my husband dealt with it mostly so I don't know what was leaking exactly."

"Valve cover gaskets leaking oil. Repaired under warranty, June 2018."

"Oil pan seal and main rear seal leaks; oil pan seal repaired; main rear seal going in for warranty repair tomorrow morning."

"Must fill the tank very slowly"

"A faulty mesh filter caused a buildup of fumes in the gas tank. While fueling, this caused the fuel gauge to think the tank was full, and the fuel pump would shut off before the tank was actually filled. This started happening around the end of 2018 and happened at most gas stations, though one rural gas station with an older gas pump seemed immune to the problem. The problem continued for several weeks until my husband took the car to a mechanic and had the mesh filter replaced."

"Loud clunky noises came from the front of the car. Took it to the shop and they replaced 2 bushings on the front left and one on the right."

"The bushings were completely blown out on the front end. Anytime during acceleration or braking, loud knocking could be felt and heard. After researching the issue, a lot of owners complained of premature bushing failure. Replaced on a weekend, complete front end including upper and lower control arms, struts and sway bar links. took about 6 hours."

"I complained of noises (sort of a jingly noise, like a chain being dragged down the road at high speed). They looked it over and told me the power steering fluid was leaking."

"The power steering pump is weak. It steers hard at low engine speed and probably needs replacing."

"Struts were replaced. Considered normal wear for a car with this many miles"

"The struts were on recall thru Hyundai Corp. Were corrected by Dealer @ no cost."

"at 125000 miles, shocks would bottom out in small holes on the road and also going across railroad tracks. all new shocks and struts fixed the problem"

"Pretty much the same comments. The 2009 Sonata has a very stiff and harsh ride and does not take bumps and road irregularities well. It is a great car for us in most all other respects and that is why we keep it."

"Noise when hitting man hole covers, ruts in road. Not a sound ride."

"Our 2009 Sonota has always had a harsh ride, and we feel even small road iregularities. It is the worst car in terms of the ride and comfort we have ever owned, but is a great car in almost all other aspects."

"Upper control arm was bent and required replacement. Made a loud squeaking noise while driving"

"leakage of steering assembly"

"Humming noise but car still ran great"

"Excessive wear"

"The rear disc and parking break systems, (calibres) , bearings and bushings are in need of constent monitoring, matainence, repair and replacement over the past 2 years to the tune of more than $ 5,000 .00 ! The worst in any vehicle I have ever own"

"Rear passenger side wheel bearing had breakage. Replaced at dealership. $700 Took two days to get the part"

"valve cover gasket leaking"

"The window weather stripping came loose and had to be replaced.I had a 2004 Sonata that was one step up from this one which had no latch or weather stripping problems when traded in in 2015."

"knocking noise in left rear when stopping or starting"

"suspension very loud when hitting any small bump in the road"

"Several squeaks , rattles ,wind noise and fogging on right front passenger window when raining and after activating defogger"

"had the issue since new, squeaking rattling in dash. Several dealer trips under warranty, never fixed. Out of warranty I discovered that the glove box doesn't close snugly - hard plastic to plastic pin latches, poor engineering. I coated them with some rubber electrical insulating goop. No more rattles"

"Rattle when starting up and engine is cold. Dealer unable to locate. Does not seem to affect performance"

"With many roads having patches, the sound is like a tin can with rocks would make. Very rough ride!"

"The window air leaks make conversation very difficult. When going over normal road bumps, it rattles badly making the ride rough."

"There is an annoying rattle associated with the sun roof mechanism. Hyundai dealer service stated that they could not hear the rattle and therefore did nothing. It is still present and is most noticed during quiet drives."

"Wind and road noise are unacceptable. Requires increasing the volume of speech and audio. Stripping is loose and insufficient"

"The road noise is BAD! Because of this I would not recommend purchasing this car"

"Don't remember when it became apparent; problem alleviated by playing radio; don't believe it is resolved."

"It's very simple; it's just quite loud in the car. I think it's just getting a little old and less airtight. It can be annoying on longer drives, but it is still a good car."

"wind noise is loud"

"Hard shifting. Replaced under warrantee. Car was at the dealer for almost 3 weeks"

"Started to jerk when shifting. Dealer said I needed a new transmission, which was covered under factory warranty. They gave me a loaner car while repairs were made"

"uneven shift between gears"

"transmission would hard downshift when coming to a stop"

"Transmission leakage discovered on last oil change. Powertrain warranty enabled replacement with rebuilt transmission."

"Switch on console electrical contacts became corroded and needed a blade to scrape off the corrosion to make work again. This was not documented in any repair manual and all others suggested replacing the entire console control unit which would cost a lot of money compared to the contacts but if a better, low voltage switch had been used this would never have been a problem"

"My Hyundai Sonata would just shut completely off while I was driving. No warning light would come on. It was very frightening, and since the mechanic could not duplicate the problem, I would not drive on a highway. After one year of this, it was determined that the computer in my car had to be replaced. My car is running fine now."

"unable to turn ignition on as tumblers in ignition switch needed replacement for the third time. Check engine light on apparently because of oxygen sensor failure. The cost was estimated at $2300,00 so I did not have oxygen sensor replaced"

"It comes on and car will lose power dangerous on highway"

"poor quality and does not last long"

"The set function works intermittently."

"The pipes were making noise due to crack connection. to muffler"

"Engine started very rough one day, took to dealer, and diagnosed as timing belt"

"Dealer said chain had to be replaced. After repairs, the vehicle began consuming oil, they said gasket was leaking and I had to pay again for them to reseal, engine still loosing oil but no leak evident, suspect cylinder seals were damaged and oil is leaking into the chamber. Their work also caused the exhaust system to break at the manifold and backfire which ended up having to replace the whole exhaust system including the converter. The dealer had the car from November to February which ca"

"The water pump failed and required replacement at an auto mechanic."