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Chart based on 27 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2009 Hyundai Sonata
Engine not specified
28000 mi
US $1
transmission shift down to 1st gear real hard...dealer hooked the car up and did a software update ...took 30 min. and everything is ok
Hard(er) shifts. Acceptable, would not call them a problem, but not as smooth as when new. Drain and fill ATF with original SPIII ATF, shift quality noticeably improved. Required about 3.6L of ATF.
68000 mi
US $90
There was an issue with a hard downshift. Not sure if it was the adaptive driving feature or firmware. The adaptive driving was reset and new firmware was applied per a TSB.
I had to pay diagnostic fee, but not repair cost.
107000 mi
US $2000
Continued problems with a hard downshift. Dealer determined the transmission needed to be replaced. Since it was just barely out of warranty Hyundai split the cost of the replacement and provided a rebuilt transmission and I paid for the labor to install it.
155000 mi
Engine light on code is trans or lock up converter not working
119900 mi
US $100
A faulty sensor was found thanks to my check engine light. Not sure what the name of it was
29000 mi
Hard downshift from 3rd to 2cnd when the car was cold. A software update was applied. This took care of the problem.
9150 mi
Same issue, dealer had car for 18days, ended up having to replace the transmission. Took parts from stock car to verify it was not computers.
84000 mi
US $150
Transmission was shifting very hard from 4th to 3rd. Had to have the transmission control computer reset and updated to newest firmware. Not covered by warranty.
33217 mi
Transmission jerks when downshifting while slowing down. Started doing it during a recent trip and when i checked, there was no oil. I refilled. Problem returned after 2 day. Dealer couldn't identify and told me to bring it back when it happens regularly.
34000 mi
US $486
Problem with transmission downshifting while slowing down. When cold, the transmission gives a big jolt when downshifting. As the car heats up the problem disappears. Did the 30k service which included tranny service but problem remains.
31800 mi
US $600
Transmission was jumping when downshifting. Had to pay for a reprogramming of the latest firmware for the transmission computer as well as a transmission flush.
33000 mi
Car was downshifting into 3rd roughly. The dealer reset the computer values to the default.
104300 mi
US $200
software upgrade to stop transmission from jerking when coming to a stop
93000 mi
Reset program to eliminate clunk when shifting 1st to 2nd.
102000 mi
US $120
Transmission had developed a hard downshift to 1st gear when transmission was cold. There was a TSB concerning the problem - dealer did the required computer update.
20000 mi
I'm still having an issue with my transmission but the dealer didn't see any problem. I dropped off my car for 2 days in July, but the dealer said there was no problem which I'm still experiencing.
clutch falls to floor on a soft foot. clutch pressure not spec. Dealer ordered new part. Same problem. Soft foot makes clutch fall to floor without pressure to pop up.
The clutch pedal would grab high, low, then stay enguaged, then a popping noise and the clutch pedal went to the floor with fluid coming out of the transmission. I had the car for 13 miles and the same condition came back, stopped working on my home street, had the service manager come out and confirm, and needed to be towed again. Replaced some valve (Service advisor said they didn't know what it was) in the clutch system and replaced the slave cylinder again. At this point it was irrelevant,the car is unreliable. Hyundai and dealer refuse to work on the car anymore, I'm Stuck.
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2009 Hyundai Sonata problems occur, check out our car reliability stats.