CarComplaints.com Notes: The 2011 Sonata has a seriously defective engine that seizes without warning. It was awarded the dubious honor of being the first CarTalk / CarComplaints Turd of the Week in late September 2015.

A class action lawsuit was filed in May 2015 against Hyundai that claims the 2.4L Sonata engine is defective. More info here.

8.0

pretty bad
Typical Repair Cost:
No data
Average Mileage:
10,150 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (2 reports)
2011 Hyundai Sonata body / paint problems

body / paint problem

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2011 Hyundai Sonata Owner Comments

problem #2

Nov 192014

Sonata Limited 2.4L V4

  • Automatic transmission
  • 19,884 miles

A D V E R T I S E M E N T S

took car to Hyundai dealer would not fix leaking sunroof under warranty. Called head office they would not fix even though under warranty

Update from Jan 11, 2017: has anyone else had a sunroof leaking that hyundai will not fix

- cherwinski, Orillia, ON, Canada

problem #1

Aug 132011

Sonata SE 2.O Turbo

  • Automatic transmission
  • 400 miles

The water has been leaking into the car in the driver's floor some but, more significantly into the area under the driver's seat into the rear floor behind the driver seat. It appears to be coming into the compartment from the air vents for the floor. especially the air vent under the drivers seat for the rear seat area. The dealer has not been able to locate the entry point of the water. It has gotten progressively worse over the three years of ownership. Of course this happens when it rains, this is unfortunate as I specifically purchased the car for road trips.

Only 12,700 miles on the car and I can hardly drive it now, it smells of mold/mildew. I initially thought that this was from a drain for the sunroof. Now I think it is from the vents below the windshield, somehow they may be clogged or something has come undone and now there is an alternate water flow to the floor vents.

I talked to a mechanic who told me that the car would have to be taken apart to find the source of the leak. The dealer said as much and wants to charge me $124.00 to get started on the problem with no sound estimate to fix it. Like just open my wallet? Really? Hurray to Hyundai!!!!! Oh, yeah I also got a "service contract", uh, warranty for a car that has one of the best standard warranties in the business. Go figure. The service department folks would not even accept my suggestion to contact the big tech at Hyundai to see if they had a clue. some service.

- benagiboymaryland, Jessup, MD, US

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