Hyundai Sonata Hyundai Sonata

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Hyundai Sonata Engine Problems and Repair Histories

Hyundai Sonata repairs by problem area

Engine (23%)

Transmission and Drivetrain (7%)

Brakes and Traction Control (11%)

Suspension and Steering (11%)

Electrical and Air Conditioning (29%)

Paint, Rust, Leaks, Rattles, and Trim (12%)

Other (7%)

Chart based on 1802 repairs.

Hyundai Sonata engine repair cost distribution

$2500+ (7%)

$1000 - $2499 (4%)

$500 - $999 (23%)

$100 - $499 (48%)

< $100 (18%)

Chart based on 136 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2016 Hyundai Sonata 4dr Sedan

154-horsepower 2.0L I4 Plug-in Hybrid 6-speed shiftable automatic FWD

3000 mi Check engine light came on. Dealer reported loose gas cap from first gas-up even though I tightened until it clicked. Dealer removed and replaced the cap. 

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2016 Hyundai Sonata 4dr Sedan

154-horsepower 2.0L I4 Hybrid 6-speed shiftable automatic FWD

9000 mi Ignition coil replaced. 

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2015 Hyundai Sonata 4dr Sedan

185-horsepower 2.4L I4 6-speed shiftable automatic FWD

high pressure fuel pump leaked due to failed bolt. They replaced bolt and seal 
1500 mi Car hesitated, sputtered and lost power. Dealer could not initially diagnose cause. Hyundai engineers became involved. Replaced engine wiring harness which resolved issue to date. 
26960 mi The "cam Sensor" failed causing the engine to run poorly. 

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2013 Hyundai Sonata 4dr Sedan

turbocharged 274hp 2.0L I4 6-speed shiftable automatic FWD

16000 mi Engine quit on highway, dealer found no problem first time, engine died a few days later in slow moving traffic. Dealer replaced ECM unit. Car since stalled out again so I guess it's not the ECM? 
23300 mi Car stalled again after dealer reprogrammed the PCM. Dealership replaced the electronic throttle system. All seems well. Dealer also performed an alignment at this service as the car pulls to the left. 
27000 mi Noticed a burning smell after a long highway drive in very cold weather. Dealer found an oil leak and replaced the valve cover and gasket moulding. 
51000 mi Check engine light. Dealer cleared code and recommended fuel system cleaning 

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2013 Hyundai Sonata 4dr Sedan

198-horsepower 2.4L I4 6-speed shiftable automatic FWD

6300 mi Check Engine light came on. Dealer said it was a vacuum leak (probably gas cap) and reset the check engine light. I had filled by tank two days before and had driven over 200 miles before the check engine light came on? Wait for fix?? 
51700 mi Metal shavings in the engine, engine was rebuilt. 
21000 mi The car was cranking a long time before turning over and running rough, with hesitations, loss of power, and trouble shifting (Auto Transmission). The Dealer said the symptoms matched a TSB and a software update would fix it. 
21000 mi After the previous repair attempt, the problem returned in one day: extended cranking, rough running, hesitation, loss of power, trouble shifting. 
35000 mi Oil drip 

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2013 Hyundai Sonata 4dr Sedan

159-horsepower 2.4L I4 Hybrid 6-speed shiftable automatic FWD

6200 mi Hybrid system fault lights keep coming on. No codes in memory. The faults cause the Hybrid system to shut down completely. Repairs still not completed. 
6200 mi The water pump for the Hybrid electric motor failed and had to be replaced 
7000 mi Well after several trips and several days of troubleshooting the dealer replaced the generator. This unit transfers gas engine enrgy to the storage batteries. 
12240 mi Generator from engine to Hybrid system battery stopped working 

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2012 Hyundai Sonata 4dr Sedan

turbocharged 274hp 2.0L I4 6-speed shiftable automatic FWD

51000 mi Computer wasn't calculating fuel mixture correctly so turbo failed to engage. Didn't affect ability to drive. Quick diagnosis and fixed under warranty. 
6200 mi Turbo Waste Gate out of adjustment. Intermittent problem with Turbo not working. Code hard to catch. Bought my own OBD2 diagnostic tool to catch the code. Once caught the dealer fixed it. Car without turbo runs like it has 50 hp 
29000 mi Turbo charger wastegate needed adjustment 
30000 mi Clip holding wastegate rod broke and needed to be replaced. Was not correctly fixed earlier 
36000 mi Turbocharger exhaust clamp broke. Lost boost. Dealer replaced under warranty 
24300 mi It was a TSB issue with the turbocharger. 
75000 mi

US $270
Turbo Oil Return line was leaking. Turbo was making whining noise and continued even after the repair. Oil failure appeared imminent. 
51000 mi Oil pan leaking 

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2012 Hyundai Sonata 4dr Sedan

198-horsepower 2.4L I4 6-speed shiftable automatic FWD

53000 mi Complete engine replacement. Rod Knock...blew a rod. 
63000 mi Camshaft locked up and damaged the engine. Under warranty, they replaced a whole engine. 
39000 mi Loose heat shield. Repaired 
59000 mi

US $350
Replace high pressure fuel pump 
40000 mi High pressure fuel pump problem causing engine to not idle or drive properly. RPMs dancing up and down. 
6800 mi Heater hose was improperly installed at the factory. Service manager said the he has seen a number of this repairs for this model of Sonata 

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2012 Hyundai Sonata 4dr Sedan

166-horsepower 2.4L I4 Hybrid 6-speed shiftable automatic FWD

3000 mi

US $25
Poor than average gas millage in winter months 
46000 mi Check engine light came on again, on a previous routine service visit, they said it was because I had the car 'on' while filling gas, but I didn't do that this interval. Cleared the code, and the light came back in about 500 miles. 

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2012 Hyundai Sonata 4-door

4-cylinder manual 2WD

28000 mi Fuel pump broke 

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2011 Hyundai Sonata

Engine not specified

13000 mi Engine light on, car running rough, getting poor gas mileage. Replaced something which managed the fuel mixture. 

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2011 Hyundai Sonata 4dr Sedan

turbocharged 274hp 2.0L I4 6-speed shiftable automatic FWD

24560 mi Turbo not responding at start up. Have to shut down and turn back on for Turbo to work. Repaired electronic waste gate. After Turbo repair, check engine light came on. Rough starting/idle. Injector issue on cylinder #2. Showing Misfire. Injector ended up being replaced. 
4000 mi Check Engine Light came on, code was for evaporative emissions system, or something like that. A pressure check was done, with no problems found. No repair was made for this issue. 
121000 mi

US $140
Turbo needed adjustment 
1860 mi Cylinder 2 misfire; car almost stalling at low revs. Reset check engine light. All cylinders reported normal. 
26440 mi Misfiring; engine light was on. Re-gapped a spark plug. 
42000 mi Replaced waste gate valve on turbocharger 
60 mi Check Engine Light appeared shortly after arriving home from delivery. Dealer reset it, and said it's nothing to worry about. 
1000 mi Engine started stalling. Valve melted into cylinder. Scratched up the walls and base, and damaged the Turbocharger. Dealership replaced Engine and Turbocharger. 
16920 mi Catastrophic engine failure. Engine died while on highway. Engine, turbo and multitude of sensors were eventually replaced. Problem not fully diagnosed. 
42000 mi

US $50
Check engine light on. Local mechanic read as turbo waste gate. Recommended I go to the dealer if it recurred. 
44300 mi Check engine light on, lack of power. Turbo waste gate adjustment 
34280 mi Replaced solenoid valve. 
64700 mi Oil leak, turbo return line corroded. Line and seals replaced. 
66500 mi Oil leaking from valve cover gasket 
11000 mi Turbo not working 
75000 mi Turbo actuator stuck; repaired under warranty. 
123000 mi Turbo waste gate 
26000 mi

US $3700
Dealer said safe 2 drive 2 destination 300mi. Slight miss @ low rpms. OKC dealer found 2 leaking valves. Took 3 days 2 get new valves & entire week for repair! OKC dealer said valves defective and had nothing 2 do with injector problem. Engine missing when started early in morning. No dealer. Fuel additive added thinking water in system. On freeway engine smoothed. Called dealer 100mi away. Told safe to drive. Injector clogged, spark plug burned off. All njtrs & plug repl. 
25420 mi Engine developed a severe oil leak. 

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2011 Hyundai Sonata 4dr Sedan

200-horsepower 2.4L I4 6-speed shiftable automatic FWD

86000 mi

US $20
Fuel cap needed replacement. CEL light came back on after only 500 miles. Will be heading back to dealer for diagnosis. 
2000 mi Check engine light cleared, checked for leak in fuel system - none found. Gas cap not properly sealing Check engine light on. Cleared light, checked fuel system for leaks, gas cap not sealing properly 
3500 mi Check engine light, checked for fuel leaks. Gas cap not sealing properly 
7000 mi Check engine light was on. Replaced gas cap. Did not fix problem 
8000 mi Check engine light was on. Replaced fuel pump, charcoal cannister and other related parts. 
27000 mi Check engine light on, checked codes and flashed the memory. Told me it needed a software update and sent me on my way. 
6000 mi engine would not turn off again 
10000 mi replaced tire pressure sensor(still have porblem of low pressure warning light coming on) 
11000 mi repair noise in exhaust shield (still have the noise) 
12000 mi replaced radio 
32860 mi Hi,I noticed I loud ticking noise first then I put my ear up close to block and heard a light grinding sound.They drained the oil to see the block.They said they have to order a new engine block because of piston problem.Only 54,000 miles. 
68000 mi

US $175
Lever connecting starter motor to engine was broken. Car was towed to dealership (which was covered by roadside assistance) and repaired (not covered under warranty) 
72000 mi Engine low on oil with no warning. Point of failure unclear however the engine was replaced 
9920 mi Low oil pressure light came on. Oil level was good. Dealer replaced oil pressure switch, but computer still thinks there isn't any oil pressure. Car is still with the dealer. Dealer states the chain that operates the oil pump failed. They ordered more parts, but still waiting on a new oil pump to arrive. Car has been with the Hyundai dealer for over 30 days now. It's a U.S. spec car in Germany. Oil pump and other associated parts replaced and vehicle fixed after 5 weeks with a local dealer. 
76000 mi

US $466
Harmonic balancer was about to fall off. It was damaged and had to be replaced. 
2000 mi Check engine light came on upon start up. Remained on through trip though car operated normally. Stayed on next day during morning trip, off during afternoon trip. Problem solved with ECU reflash. 
47000 mi Engine blown. No warning except lifter sound (like marble in a can). Heard only above 1800 RPM under acceleration. Under 1800 car drove normally. No leaks, temp, smoke. KEEP GOOD RECORDS! Would take two months to get new engine, traded. 
40920 mi B1S2 O2 sensor replaced. 
35000 mi Radiator developed a leak. I had noticed coolant drips on the garage floor and figured it was just a loose hose or something like that. Apparently radiator was cracked somewhere. Repaired under warranty same day despite being very busy day. 

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2011 Hyundai Sonata 4dr Sedan

198-horsepower 2.4L I4 6-speed shiftable automatic FWD

36000 mi Going down the highway and heard a thump from underneath the car. Did not run over anything. Went to the service department and explained what happened. They performed ecm update. 
75000 mi

US $649
Originally O2 sensor was bad. Then they told me the catalytic converter was cracked. Repair ordered suggests that they might have damaged it replacing the sensor. Also brake fluid change. 
78000 mi Engine seized 
23000 mi Push button starter would not work. Parts were replaced and computer flash. This issue was also a recall. 
93000 mi Engine recall Campaign 133 
42000 mi Connection to ignition switch was loose, causing car to not always start right away with keyless button. 
30000 mi starter button needed to be replaced. car would not start because of technical bulletin on this part. 
64000 mi

US $140
Car wouldn't start. Dealer wanted $575 for a new starter (ridiculous). It was only broken plastic starter lever (common sonata problem, cheap part). $12 for new lever, $129 for 3rd party shop labor. 
68700 mi

US $50
Sluggish over 60 mph. Check engine light - p0303 - misfire on cylinder 3. Pulled OEM spark plugs, they looked absolutely terrible (supposed to be rated for 100k). Replaced with more OEM iridium plugs. Problem solved. 
68000 mi oil pan gasket 
15000 mi O2 Sensor 
24300 mi CEL came on. Second O2 sensor readings were bad. Dealer determined it was bad and is replacing it free under warranty, waited almost two hours to find out what was wrong, now i have to go back in a week for another 1.5 hours to have it fixed 
16000 mi Catastrophic Internal Engine Failure. Entire engine replaced $7300.00. 
78740 mi

C $500
A leak in the oil pain was fixed. 
63000 mi

US $320
Started failed, replaced. Recall work performed on brakes. 
38000 mi Rattling Exhaust 
20000 mi O2 sensor failure. O2 heater failed. 
32000 mi press to start button inoperative 
26760 mi Coolant in ovrflow container continued to lose fluid. Dealer tech said lower coolant hose was pinched, he re-positioned it. Over a yr. later, STILL losing coolant on 5/23/13 at 39301 miles. This time tech discovered "oil cooler tube" was split. Part # 25470-2G000 replaced under warranty. No further problems. 
13500 mi Engine unusually noisy under load -- a type of clattering sound. I suspect pre-detonation, but dealer says sound is normal. 
29140 mi

C $300
Slight oil leak 
28000 mi

US $300
replaced oxygen sensor under factory warranty 
34000 mi Radiator developed a crack in the plastic below the radiator cap. It was slowly losing fluid. The Radiator was replaced under warrenty at no cost. 
15000 mi would not start, new computer installed 
50000 mi

US $40
Check engine light on. Dealer scanned and determined problem was thermostat. Hyundai has issued a TSB related to the thermostat, thermostat housing, and gasket. Parts not in stock. Dealer ordered parts and will replace under warranty. 
49300 mi Starter on fire and engine seized replace sensors that failed from previous replacement 

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2011 Hyundai Sonata 4dr Sedan

198-horsepower 2.4L I4 6-speed manual FWD

15000 mi radiator leak, replaced under warranty 
32000 mi At 30,000 mile scheduled maintenance visit, I mentioned driveability problems. Throttle body was cleaned and adjusted. 
150 mi Replaced leaking fuel injector on cylinder #3 
24000 mi Buzzing noise that we thought was a flex pipe - it was just a fuel line bracket. Part ordered - will be installed soon. 
40000 mi Check engine light cam one on highway - dealer diagnosed a thermostat for which a TSB had apprently just been issued. The thermostat was replaced under warranty. Still have intermittent driver's door window control problem - future visit. 

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2011 Hyundai Sonata 4dr Sedan

166-horsepower 2.4L I4 Hybrid 6-speed shiftable automatic FWD

31000 mi hybrid generator failed, relay switch had water on it 
3388 mi Starter, nvld 
38000 mi car shuts off at low speeds, sometimes won't start 
48000 mi fuel system computer/electronics 
3000 mi CEL light for engine problem came on. It could not be repaired at this time and Hyundai is working on it. No functional problem other than light's glow. 
7000 mi Software updated and problem solved 
30000 mi Computer system received several upgrades to improve drivability. It now runs GREAT. 

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2010 Hyundai Sonata

Engine not specified

50000 mi

US $3500
Catastrophic engine failure of unknown origin. Repair estimates more than $3500 

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2010 Hyundai Sonata 4dr Sedan

249-horsepower 3.3L V6 5-speed shiftable automatic FWD

42000 mi Lost power while driving on Interstate 65. Went into limp mode and made it to next exit. Car towed to dealer. Diagnoses was failed TPS. Replaced throttle body under warranty. Tow was also covered under Hyundai Roadside Assistance. 

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2010 Hyundai Sonata 4dr Sedan

175-horsepower 2.4L I4 5-speed shiftable automatic FWD

19220 mi GPS malfunctioning again. Another update was performed. 
52000 mi Throttle Position Sensor and other problems 
35000 mi

US $60
drive belt replaced 
68000 mi

US $1000
drive belt needed replaced per dealer as it was "worn and cracking". I replaced the drive belt, and it was worn of course, but it was not cracking at all. 
98500 mi

US $440
Accessory Belt tensioner needed replaced - was squeaking after putting new belt on. failure to start reliably, but idle was ok, getting some misfire codes. cleaned throttle body plate and car has worked normally since. 

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2010 Hyundai Sonata 4dr Sedan

175-horsepower 2.4L I4 5-speed manual FWD

63240 mi

C $3000
fan/drive belt 
14880 mi

C $400
Loss of coolant on several occasions, noticed by myself, but topped up. On inspection dealer noticed leak at attachment of hose, part replaced, new coolant, problem solved. Check engine light, no other symptoms although could have been coolant problem. 

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2010 Hyundai Sonata 4-door

4-cylinder automatic 2WD

26660 mi

$15
The engine light went on and they checked it to be Bank1/Sensor1 oxygen sensor. 
29140 mi The car went on a "forced limited RPM". Checked the codes and it pointed out to acc. pedal sensor. Cleaned the sensor connection and reset the codes. Car ran fine after that. 

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2009 Hyundai Sonata 4dr Sedan

249-horsepower 3.3L V6 5-speed shiftable automatic FWD

76000 mi

US $325
I needed the throttle sensor replaced and the software reprogrammed. 
41000 mi Check engine light came on, second o2 sensor on cat. converter failed, replaced under warrantee 
54000 mi

US $189
Small oil pan leak  
60000 mi Check engine light comes on,goes out,4 times in past month engine light has come on,motor goes to idle and throttle does not respond. Have to pull off road,turn off,then it will restart. Dealer not able to diagnosis,says no code in history 
61000 mi

US $300
Different dealer, where originally purchased. Replace faulty throttle body adjustment switch. Since out of warranty had to pay for replacement. 
61700 mi Same problem as before, check eng. light on, engine goes to idle, no throttle response. 
1000 mi Needed to apply a TCM software update to solve a problem with abrupt shifts from 1st to 2nd and 2nd to 3rd gears. 
27000 mi

US $112
A month ago check engine light began to intermittently come on, the vehicle would occasionally lose power. We had the engine light checked and was told it was the TPS sensor. Warranty covered the TPS replacement-$112 for throtle body clean 
70000 mi

US $400
Dealer reported a head gasket leak. 
13000 mi Car went into "limp" mode; check engine light and "ESC off" lights came on. Dealer replaced throttle body. 
30000 mi The car surged then went into "limp mode" coasting to a stop. After restarting it was driveable but the check engine light stayed on. Dealer replaced throttle position sensor and "updated the computer" under warranty. 
49000 mi intermittent 'limp-home' mode and intermittent 'check engine' light. Dealer replaced the throttle body assembly (warranty). 
63000 mi The car had a issue with idling cold with no codes, The dealer reflashed the computer and sent us away. It helped for a while. 3 weeks later the car went into limp mode with codes and a new idle sensor was ordered after a tow to the dealer The idle sensor was replaced and successfully fixed the problem. 
19000 mi Fuel line leak; replaced fuel pipe  

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2009 Hyundai Sonata 4dr Sedan

175-horsepower 2.4L I4 5-speed shiftable automatic FWD

53000 mi Emissions leak from dirty fuel tank air filter 
23700 mi

US $600
Dealer repair service stated that the serpentine belt was cracking and should be replaced. I questioned because mileage was low but they maintained that 5 years is life cycle for such a belt. I asked to save the used one and give it to me. 
82000 mi gas mpg dropped by 15+ per cent in last 4 months. cleaned fuel injection system. 
101000 mi

US $5
Key frequently sticks in the ignition and will not turn. Multiple inquiries have produced various possible solutions. O manual says to turn steering wheel and key simultaneously. Locksmith says to clean with Ballistol. Not happy. 
108000 mi

US $450
Check engine light came on reportedly due to lack of airtight integrity in fuel delivery system - replaced gas cap. Dealer expressed concern about risk of fumes in the cockpit. Excessive costs for "diagnostics" $75+ - considering work done 
118000 mi

US $730
Replace clogged fuel pump. Parts special ordered from Hyundai, with repairs delayed by 2 consecutive errors in special order fulfillment. 
46000 mi

US $550
Ignition cylinder would not function-- steering wheel locked. New key cylinder installed.  
63000 mi Difficult to put gas in tank. Nozzles would keep shutting off. Told debris in filler neck. Repair attempt unsuccessful. Makes getting gas time consuming 
107000 mi

US $35
Ignition switch was failing. Starter would stick in start position. Easy repair, $35 dealer part. 
50000 mi Hard downshift on stopping. Reprogrammed chip for transmission. Perfect fix. No further problems. 
47000 mi Fuel backed up when filling even less than a gallon. El Paso Hyundai replaced a sensor near the fill line. Some relief but still premature click off at the fuel nozzle. Lakeland FL worked with factory.Obstruction in fuel line (webs) 
54500 mi Putting fuel into tank still causes multiple click-offs of nozzle. BUT, it does not give an error code. I have been videoing my fillups; only happens some of the time. 
60000 mi Unable to add fuel. Hose would click off within adding a gallon of fuel. 
30000 mi Timing chain failure, dealer did repair under warranty coverage, went to pick up after 3 days and found leaking oil in their lot, dealer took 2 more days to repair oil leak. 
7220 mi Leaking timing chain cover discovered doing routine oil change 
137000 mi

US $35
Evaporated vent valve ng 
134 mi Serpentine belt was defective 
6200 mi

C $30
Fuel smell narrowed down to between ports 2 and 3. Pulled the intake - the groove for the intake gasket on port 3 is warped, gasket doesn't seal, thus a minor fuel leak. Replaced gasket, problem still persists. Fuel smell under the hood and inside when the car is stopped at the red light. Could smell it around the car after shutting engine off. 3 visits to the dealer (Richmond Hill Hyundai) said no problem, washed the engine, problem persists Pulled the intake again, applied Permatex gas-resistant high-temp silicone around the gasket. Fuel smell is almost gone, at acceptable level now - cannot smell it inside or outside. Ideally need to replace the intake - an $800 part. 
1200 mi New car, in shop for 32 days with 285 miles. Electrical problems first manifested by trans. shift lock not releasing. Modules, brake switches, main fuse box, and main wiring harness replaced. Proceeding with Lemon Law procedures as the car is not "NEW 
8000 mi Auto Transmission was repaired in early October. It shuddered and vibrated at between 40-60 miles/h. TCM was updated but didn't resolve the issue but improved shifting quality. Made another appointment to check it up at the end of October. 
8000 mi The problem only occurred when the engine was cold or parked for a long time. I could not replicate the problem and when I explained them what was going on, they said they couldn't fix it unless they see the problem. 
46000 mi

US $45
Oil leak from timing chain cover. Replaced seal. 
53500 mi While Cold, the transmission would jerk while downshifting. Problem went away after engine/trans heated up. Dealer reset the computer and problem is gone. TSB out from manufacturer. No Cost to me. 
19000 mi Knocking or Pinging of the Valves when accelerating. 
89000 mi vehicle stalled twice (once three days ago after fueling and then again last night while driving on I-95). Dealer found no error codes and could not find any issues with idling or starting. it was FINALLY discovered that the vehicle's fuel pump was faulty. It was replaced and another Hyundai dealership took very good care of me ( and my new car USED car) 
49600 mi

US $155
reset computer, flushed transmission fluid 
17000 mi Harsh 4-3 downshift. Dealer reflashed transmission computer. 

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2009 Hyundai Sonata 4dr Sedan

175-horsepower 2.4L I4 5-speed manual FWD

7305 mi Check engine light, stalling, skipping, codes P0300 to P0304. Dealer kept it for over a week and replaced the Oxgen sensor. Dealer could not explain why it happened, They stated, "I hope this does it." 
59000 mi

US $350
Camshaft position sensor 
45000 mi Fuel pump went out. Fuel pump relay was bad. 
29000 mi Broken weld on exhaust pipe assembly - also damaged muffler 
29103 mi Tailpipe and muffler replaced under warranty - follow-up to earlier trip when problem was diagnosed and parts ordered. 
48700 mi

US $1317
Clutch, pressure plate & throwout bearing replaced. Flywheel refaced. Dealer says lining just wore out. I purchased the car as certified pre-owned with 25K on the odometer and the clutch never felt quite right and has a much different feel now. 
52268 mi

US $255
Replaced front crank seal and resealed oil pan. 

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2008 Hyundai Sonata 4dr Sedan

234-horsepower 3.3L V6 5-speed shiftable automatic FWD

28520 mi

C $280
Car idled rough during a warm engine stat-up. Revved high briefly also exhaust smoke noticed. Car made a metallic noise during start-up. Dealer found no problems. Car has been running fine since. Brakes serviced. Intermitent squeal backing 
63620 mi Engine leaking oil - Timing chain cover. Flushed cooling system and replaced engine oil and filter as well. 
76440 mi

C $635
Fuel either spills-out or is literally "thrown-out" towards the fuel pump operator during full tank fill-ups when pump detects a full tank and stops filling. Still, inadequate cabin heat! Previous reported repairs under Factory Warranty included the malfunction of the temperature regulating damper door. Dealer had found a missing clip. Dealer replaced thermostat and coolant this time. 
48000 mi Six hours later car would start, but not accelerate. Had to be towed to nearest dealer. Accelerator switch had broken. 
43000 mi Replaced valve cover gasket. 
10000 mi My engine developed a knocking noise that sounded "deep". I took the car to the dealer and they agreed that it shouldn't be driven. The dealer called me the next day and told me that it needed a new engine. The dealer replaced the entire long block. 
114000 mi

US $3487
Head gasket leaked, water pump leaked, Idler pulley failed, valve cover leaked oil, rear brakes needed pads and rotors, 
68000 mi

US $200
Hoses are leaking. 
80000 mi

US $300
throttle paddle replaced 

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2008 Hyundai Sonata 4dr Sedan

162-horsepower 2.4L I4 4-speed shiftable automatic FWD

11000 mi Replaced thermostat because of low heat. 
67000 mi

US $394
A flap or gasket was not opening properly to let air out so engine can turn over. They replaced it. I can't remember the exact price but it was over $300 
75000 mi needed left bank o2 sensor replaced. Also need to check suspension 
117000 mi

US $781
#3 connecting rod bent, catastrophic failure. 
19700 mi the engine was missing 
79300 mi

US $700
Fuel pump was too weak to start vehicle. Pump needed replacement, and car needed to be towed to dealer. 
120000 mi

US $140
Replaced thermostat. Replaced drivebelt and idler pulleys. 
41000 mi Check engine light came on. Warranty repair- camshaft position sensor indicated overadvanced timing. Corrected. 
50000 mi Check engine light, oil pressure regulator faulty, replaced. Transmission was not going into "OD" (torque converter lockup)and mileage dropped noticeably as a result. Transmission was reprogrammed preventing former premature "lockup" condition since new and OD seems to be working correctly again 
55000 mi Since new, car prematurely upshifted into OD, causing engine lugging, poor throttle response and an objectionably loud booming sound within the cabin. Reprogramming the shift point almost eliminated these issues, netting better overall mpg 
92360 mi Check Engine Light Came on. Went off later on its own. 
99180 mi

C $900
Replaced Fuel pump 
256000 mi engine check light came on required new gas cap (Factory original only 
49700 mi Engine noise like valve lifters since 22K miles when cold. The colder the temperature the louder the noise. Took three trips to dealer. Manufacturing defect. Poor oil supply to #4 cylinder (4 cyl. engine). Replaced short block. 
55000 mi Replaced fuel pump 

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2007 Hyundai Sonata 4dr Sedan

234-horsepower 3.3L V6 5-speed shiftable automatic FWD

66340 mi Oil leak from engine block. Diagnosed by dealer saying gasket needed to be replaced. 
108500 mi Check Engine Light just came on. Checked the code myself - issues with Catalytic Converter, it appears. 
120900 mi Check Engine Light on with P0420 code indicating perhaps issues with the O2 sensor or with the actual catalytic converter. Due to the vehicles age and that I intend to only keep it for another 1-2 years. Repair is expensive. 
134300 mi Check Engine light blinking; OBD indicated that all 6 cylinders misfired; read online numerous engine issues identified with '07 Sonata. decided not to repair due to cost vs car resale value. 
61000 mi

US $150
Emission codes indicating small vapor leak, this needs to be repaired before the car will pass a New York State inspection. This did not affect the safety or the driving of the car. 
63000 mi

US $524
Emission system, small vapor leak, O ring and a plastic tube was replaced. Emission system, left lower Oxygen sensor fault. 
42000 mi Cleaned throttle body 
78700 mi

US $600
Fuel pump seal wore out resulting in check engine light. No performance hit but repair required the removal of my back seats. 
116000 mi

US $300
Replaced leaking valve cover gaskets. 
63300 mi Oil leak from Valve Cover that was dripping on the alternator. Dealer fixed under warranty, but had to take it in twice to get it fixed correctly. 
27900 mi

C $688
Persistent engine check light on. Brake sticking. 
32860 mi

C $400
Timing belt replaced under warranty 
35960 mi Vibration felt in cabin when A/C compressor engaged. Issue appears to have been caused by engine cooling fan. Fan removed - bearings in track of fan casuing "out of balance" condition when fan spinning at high rpm. Fan replaced under warranty 
64500 mi

US $20
Pcv valve clogged 
27000 mi Throttle position sensor going bad. Technician replaced the wrong sensor and misdiagnosed problem even though it is a common and widespread problem with Hyundai. Replaced throttle position sensor. 
91000 mi leaky valve cover gasket. Covered under warranty. 
104000 mi

US $430
Valve covers replaced at 90K under warranty by dealer. Need replaced again after only 10 mths. Dealer says no longer under warranty. Replaced at 3rd party shop for $200. This was cheaper as doing plugs anyways. No longer trust dealer. 
105000 mi

US $1250
Replaced valve cover gasket that the dealer replaced less than a year ago. Also has plugs replaced as well which requires the removal of the plenum to access the rear 3 plugs. 
45000 mi

US $320
p2106, p1295, p161B Repair was attempted but car would not start easily and ran rough. Kept the car another day and discovered work was not done properly. 
48000 mi check engine light 
46000 mi

US $400
o2 sensor light. 
49700 mi

US $238
O2 sensor on opposite side quit working. First one replaced in Sept 2012. 
68000 mi

US $100
another O2 sensor. This is the 3rd trip same problem. 
68500 mi They replaced one sensor and a few days later the check engine light came on and it was ANOTHER 02 sensor 
45000 mi Throttle position sensor was bad and the car was in "limp mode" and had to be towed into the dealership. 

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2007 Hyundai Sonata 4dr Sedan

162-horsepower 2.4L I4 5-speed manual FWD

57000 mi MAF replaced. 
65000 mi

US $850
Random stalling. MAF and throttle body replaced. Dealer claimed K&N air filter damaged them. K&N tested parts, found no defects, probably only needed to be cleaned. K&N refunded repair cost, seeking settlement with Hyundai of Wesley Chapel. 

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2007 Hyundai Sonata 4dr Sedan

162-horsepower 2.4L I4 4-speed shiftable automatic FWD

143000 mi

US $450
Exhaust System needed repairs, flex pipe replaced, 250 
243000 mi

US $350
Oil Pan was leaking, need to be replace because of Rust 
160000 mi

US $3700
Engine blew out and car would not start at all! 
44000 mi

US $30
Car failed to start - called roadside assistance and they couldn't get it to start, either. Towed to dealer. The car started for them.  
73866 mi Intake manifold gasket leaked. Replaced. OCV (Oil control valve) for timing advance was malfunctioning. Replaced. Warranty items.  
48000 mi lean fuel mixture - leaky intake gasket replaced under warranty 
66000 mi Intermittent check engine light on for day, off for several - found an oil valve was faulty. extended warranty covered repair. 
78000 mi

US $500
New fuel pump 
69000 mi

US $569
check engine lite on... error code P0011. Replaced oil control valve leaking intake manifold Gasket .. replaced gasket 
99000 mi

US $850
no-start condition. Car towed to repair shop. Diagnosed as bad fuel pump. Replaced fuel pump 
79000 mi

US $15000
evaporative emissions 
17000 mi Ignition key cylinder would not let key turn. Unable to start car, towed under original recovery plan. Dealer replaced cylinder, no direct cost as still under warranty. 

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2006 Hyundai Sonata

Engine not specified

106640 mi Made a weird noise when started. Caused by the timing belt. Hyundai should have recalled. Expensive to fix out of warranty, so I didn't. 
60000 mi car currently in garage for the 6th heater core failure and no cause for problem found. Hyundai not addressing this Lemon problem properly. Car is totally unreliable for trips 

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2006 Hyundai Sonata 4dr Sedan

235-horsepower 3.3L V6 5-speed shiftable automatic FWD

112000 mi new tensioner pulley thermostat housing replaced. seems after 100,000 miles car is falling apart under normal driving situation. 
32000 mi Time chain tensioners 
2700 mi Hyundai new V6 engine for 2006 had a defect with the timing chain tensor. A service bulletin was issued to resolve the issue under warranty. Dealer opened chain cover section of the engine and installed a newly designed component. 
46000 mi

US $35
Both valve cover gaskets replaced gas cap replacement 
33000 mi Engine sometimes loses power under full-throttle acceleration. Check Engine, ABS and ESC lamps lit. ABS and ESP lamps go off after restart, and engine power is restored. Check Engine lamp goes off after multiple restarts. Dealer claims OBD has no codes. 
48300 mi Replaced harmonic balancer. 
119700 mi

US $3000
Engine mount 
181000 mi

US $98
This is the seventh time since April 2010. My Sonata still exhibits the same identical problem with the engine intermittently shutting off without warning. The dealer just reset the ECU. 
14000 mi

US $100
Check Engine Light on...replaced 1 Oxygen Sensor. After getting car back, next day, check engine light blinking. Car towed to dealer. Per dealer replaced a second Oxygen Sensor. 
43400 mi

$600
Radiator Issue - replaced Radiator. Engine still heats occassionally. 
45000 mi

US $600
Oil leak they had to take engine apart to repair it and reassemble but it was repaired 
50000 mi leak in car; pump replaced engine leak 
28000 mi

US $3000
Timing chain broke & blew the engine; oil changed every 3k ml. Had oil change 5 days before this @ Tarbox Hyundai RI - was told no current problems w/car. Ordered used engine online & had private service station replace it. 
55000 mi front O2 sensor 
59500 mi rear O2 sensor 
106000 mi

US $300
Replaced spark plugs and cleaned injectors. Latter was preventive. 
27000 mi Check engine light was comming on also car was bucking and shaking at idle. Two sensors were replaced car seems OK now. 
37000 mi Check engine light on, car runs rough. Dealer cleared code said if it came back they would have to change the coil packs. 
37000 mi CEL light constantly going on and off also runs very rough. 
40000 mi Cel light on bad coil pack, replaced. Plugs fouled as a result of misfire dealer refuses to do anything about them. Warranty is useless. 
40000 mi bad idler pulley 
88000 mi

US $170
Harmonic balancer was coming apart. Also valve covers were leaking oil. 
39060 mi Throttle Position Failed and vehicle could not be driven. 
81000 mi

US $500
Throttle assembly had bad sensors and had to be replaced. There were two other problems:Brake light switch and air bag sensor. The air bag problem was covered by warranty 
109000 mi

US $600
Left front valve gasket cover brittle and leaking oil into alternator. Discovered when brought in to have spark plugs replaced at 107,000 miles (spark plug removal requires removing the intake manifold) 
120000 mi Car died today without warning while driving . Thought it was alternator, but wasn't that. Crankshaft won't even manually turn. Plenty of oil, battery good. Won't repair or replace engine due to high mileage and cost.Will junk car. 
34720 mi

C $64500
higher reving,idles rough,sputters. code retrieval,$89.99,fuel supply system $87.00,throttle $302.90,Parts $324.42,labour $246.59,taxes $74.23.Total $645.24 
64000 mi Canister valve not working. 
93000 mi Also needs fuel tank vent and filter assemble. Check engine light. Recommend. Service and reflash computer 
102700 mi

US $584
Install sop vent valve. Replace the Evaporate filter. Code. P0449. 
90000 mi

US $300
Replaced bad fuel pump 
24000 mi Engine not as smooth as when new. Engine harder to start than when new. 
99200 mi

C $442
Oil leak, valve cover gaskets replaced. 
10000 mi Timing belt problem 
37200 mi

C $775
car would not start and flooded itself 
40920 mi

C $453
Vehicle would not start and was flooded. they had to clean plugs and checked the systems. New battery was installed 
11000 mi Car emitted a groaning sound when starting up from first gear. The sound was intermittent and occurred only for a few seconds before the car shifted to second gear. There was a TSB issued, but the technician at the dealer said he could hear no sound. 
46000 mi Check engine light came on & stayed on. Brought car to dealership. The service department could find no reason for light to come on & reset system. 
19000 mi Dropped a cylinder. Found corrosion on one coil pack causing the misfire. 
112000 mi

US $280
The cam position sensor needed to be changed. 
131000 mi

US $125
The key got stuck in the ignition. I had to get a locksmith. 
123000 mi

US $287
Replace faulty Throttle Position Sensor. 
128000 mi Valve gasket leaks a bit of oil on to alternator. Mechanic said I don't need to repair at this time. Update: unclear if still leaking when sold, would have had to clean engine to find out. 
10000 mi Engine made "tapping lifter" noise on cold starts. Dealer changed timing tensioner per TSB, but it didn't help much. 
25000 mi Motor mount had popped loose. Made a clunking noise on acceleration. Dealer checked it and tightened the mount. Issue has not come back. 
54500 mi

US $600
Gasket Leak 
77000 mi

US $100
Leaking valve cover. 
52000 mi Engine belt tensioner pulley replaced 
63000 mi Gasoline engine sounds like diesel, making a clacking sound, when started cold. Lasts for 15 minutes, and is not simple cold start issue. This has been around for the last 4000 miles. My guess is some valve issue, perhaps no proper lubrication.  
64000 mi

US $900
Electronic throttle assembly and related electronics 
77000 mi

US $475
Harmonic balancer replaced. Earlier complained to the Service as 'loose belt', but 'could not reproduce'. 
105000 mi

US $150
leaking valve cover replaced 
83000 mi

US $350
O2 sensor went bad 
94000 mi I twice tried to get my dealer to deal with the ticking and rattle coming from the engine. 
16000 mi Strange noise after starter engaged..dealer said they were aware of this problem. 
48000 mi Faulty upper radiator hose... previous dealership service department did not correct the problem.. new dealership did. 
8000 mi timing chain tensioner replaced as per TSB 
92000 mi

US $458
Charging light kept coming on and when checked was told that the alternator was not charging. The alternator was replaced and the shop advised that leaking oil caused the failure. Gasket still to be replaced to stop oil leak 
15000 mi Trouble code indicated bad oxygen sensor. Tech found it okay. Needed factory computer connection to fix problem. 
59000 mi Leaking front valve cover gasket. Repaired under 100k powertrain warranty. 
66000 mi Valve cover gaskets and oil pan gaskets were leaking oil. 

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2006 Hyundai Sonata 4dr Sedan

162-horsepower 2.4L I4 4-speed shiftable automatic FWD

82700 mi

US $400
Had to replace ignition cylinder as the key would often not turn. 
53000 mi replaced oil control valve, check engine light on, code P0011 
87000 mi Leaking oil 
65100 mi Check engine light came on and disappeared several times, then constantly on. Detected code P2187 myself. Run the car as is and have to find reason. (looked it up - too lean) 
94840 mi New engine code P0455. Not repaired yet for the lack of time. 
119040 mi

C $150
Oil pan rusted through, leaked oil. Change of oil pan 
119940 mi

C $20
Intake manifold gasket changed. Code p2187 cleared. 
124000 mi

C $200
Purge solenoid valve replaced for code p0455 
66000 mi

US $50
Fuel filler overflow was not working correctly. Pump would not shut off when filling car. Replaced fuel line filter/valve assembly. 
230000 mi Threw a rod. Totalled the car. I gave it to the junk yard. 
76000 mi

US $300
Timing belt issue, except it was not due for a replacement. 
72000 mi Oil pan leak, drain plug also replacement of oil pan and gasket.. upon removal found timing cover leak also replaced under 100,000 miles engine warranty. 
82000 mi

US $110
Car taking too long to warm up. Changed thermostat, hopefully takes care of problem. 
62000 mi Engine had a hitch, service engine light came on just before arranged service. Engine continued to hitch and the service engine light came on again!!! 
30000 mi A surge had developed while driving at approx 55mph with the cruise control on. The dealer couldn't duplicate it - so no fix (yeah - I wasn't happy). 
114000 mi

US $164
When trying to start the car it would turn over but not start. After 7-8 attempts I was able to get it going and the engine light turned on. Deposits of carbon and sludge from the PCV system get into the throttle body. Cleaned throttle body. 
149000 mi

US $900
They replaced the manifold. 
24000 mi Gas gauge read inaccurate readings, Gas tank fuel sensor module replaced. 
42000 mi Catastrophic engine failure, subsequent three additional engine repair related repairs. 
117000 mi

US $530
both oxygen sensors became faulty and had to be replaced 
111000 mi Exhaust pipe leak 

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2006 Hyundai Sonata 4-door

6-cylinder automatic 2WD

20460 mi Low coolant level in expansion tank. 2nd time this has happened. 
17000 mi Timing Chain was making noise when engine started Mechanic knew what the problem was when described. 

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2005 Hyundai Sonata

Engine not specified

187000 mi

US $40
Car would not start after refueling at the gas station. I replaced the purge solenoid under the hood behind the motor of my V6 Sonata.  

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2005 Hyundai Sonata 4dr Sedan

170-horsepower 2.7L V6 4-speed shiftable automatic FWD

162000 mi

US $1000
Hole in manifold/catalytic assembly. Replaced. 
118300 mi

US $905
Car would Vibrate when the A/C was on at stop lights in drive and when in reverse. Spark Plugs Wires and Oxygen Sensor were replaced. The 'check engine' light later came on as well and then went off after a week. 

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2005 Hyundai Sonata 4dr Sedan

138-horsepower 2.4L I4 4-speed shiftable automatic FWD

76000 mi

US $365
Had issues with check engine light and car stalled out. Dealer diagnosed throttle body bad and owner paid cost of replacement. 
77000 mi Surging remained. New spark plugs end fix. 
81000 mi Timing belt/chain module Dealer repaired same issue. 
82000 mi

US $150
# 1 spark plug wire failure to # 4 coil. 
110000 mi

US $317
Engine overheat due to radiator leak,replaced radiator and fluid . 
62000 mi

US $770
Increasing frequency of rough idle/misfire problem, finally threw code, replace EGR, replaced spark plug wires and coil packs as preventative measure. 
173000 mi

US $350
Had crank position sensor and timing belt replaced 
93000 mi

US $1100
Oil Leak at valves. Transmission fluid needed change. Spark Plugs and Drive belt change. valve cover replacement After this repair, car started having a thermostat problem. Engine was going hot and car was stalling on the road and hesitating to move. 
80000 mi

US $125
Radiator seal leaking. Engine overheated. Replaced seal and replaced anti-freeze 
65100 mi

$150
Engine was knocking under load after cold start. Replaced main and rod bearings. Were really worn. Mechanic indicated oil starvation. Will soon check oil pressure. Probably engine abused by previous owner - run low on oil or used bad filter 

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2005 Hyundai Sonata 4-door

4-cylinder automatic 2WD

96000 mi

US $100
A crank shaft sensor was out, causing mistiming on engine. Car would stall and die. This might have been caused by an old timing belt problem (which was also replaced, but not listed above - routine maintenance). Sensor replaced. All good. 
123300 mi

US $300
One of the engine mounts had deteriorated and needed to be replaced. 

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2004 Hyundai Sonata

Engine not specified

90000 mi

US $500
Vacuum line rot thru.  

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2004 Hyundai Sonata 4dr Sedan

170-horsepower 2.7L V6 4-speed shiftable automatic FWD

156000 mi

US $116
Check engine light, scan code showed both oxygen sensors faulty. replaced both sensors.(sensors 1 on banks 1&2) 
178700 mi

US $50
O2 sensor 
195000 mi

US $175
flex pipe was leaking so they cut it out and welded in a new one. Took it to a custom exhaust shop. It only took 20 minutes. 
56451 mi Replace fuel sending unit 
81000 mi oil pan leak 
120000 mi

US $60
Both upstream oxygen sensors developed faults, and were replaced. 
179000 mi

US $235
Passenger side fan was replaced for $235 by Craig Radiator 
170000 mi

US $350
Coil new wires and plugs and some fuses 

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2004 Hyundai Sonata 4dr Sedan

138-horsepower 2.4L I4 5-speed manual FWD

98000 mi

US $160
Timing Belt Slipped...Caused Intake And ExhausT Valves To Be Damaged. No Repair Was Done And Car Was donated 

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2004 Hyundai Sonata 4dr Sedan

138-horsepower 2.4L I4 4-speed shiftable automatic FWD

69000 mi

US $99
Check engine light reading indicates 'Crankshaft Position sensor not working.' 
72000 mi

US $846
Front Passenger side Engine mount worn out and replaced 
141000 mi

US $1235
Replaced timing and driving belts due to squeak caused by worn belts. Engine hard to start and rough idle. Conducted Fuel Induction Service to include replacing of spark plugs. Rough idle remained following service, although car ran better. Owner diagnosis: Worn engine mount. 
67500 mi

US $578
coils, plugs and wires: $578 
68000 mi Catalytic converter faulty after having plugs, coils and packs replaced. Thankfully was still under 8y/80k emissions warrantee 
103700 mi

US $300
crankshaft pulley failed 
112000 mi

US $600
valve cover gasket leaked, was replaced exhaust flex pipe broken, repaired 
122000 mi

US $700
fuel filler pipe had rusted through, causing emissions failure. part was ordered, yet to be replaced 
108000 mi

US $30
Car overheating due to faulty thermostat. Replaced thermostat 
109500 mi

US $520
Car was running very rough. Had 2 bad coils replaced in engine. This had been taken to the dealer previously but they did not diagnose the problem. They fixed sensors and not what was causing the sensors to malfunction. 
118300 mi

US $565
Car was using oil. Replaced valve cover gasket, oil pressure switch. 
62000 mi Serpentine belt and tensioner replacement. 
69000 mi CEL for unknown reason. Reset with no ill effects. 
83000 mi CEL on: misfire due to worn or improperly replaced engine seals causing oil and coolant to leak. 
112760 mi

US $865
CAR OVERHEATED AND BLEW A HEAD GASKET 

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2003 Hyundai Sonata

Engine not specified

103000 mi

US $189
cam sensor replaced. car wouldn't start after running and parking for awhile. needs catalytic converter and two sensors according to check engine code. Was told this by another shop over a year ago, but both shops say this is not critical and will be expensive. 

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2003 Hyundai Sonata 4dr Sedan

170-horsepower 2.7L V6 4-speed shiftable automatic FWD

107000 mi

US $1200
alternator dying due to valve cover gasket leaking oil onto alternator. alternator and valve conver gasket replaced. 
179800 mi

C $500
Emissions failure 

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2003 Hyundai Sonata 4dr Sedan

138-horsepower 2.4L I4 4-speed shiftable automatic FWD

143000 mi

US $500
Ignition switch failure 
145000 mi

US $425
Car would not start intermittently. Code P0335. Replaced cracked coils. Code reappeared, will require replacement of CPS. 
145300 mi

US $900
Check engine light. Replaced timing belt, water pump, throttle position sensor (code for crank position sensor was incorrect). 
91760 mi

C $145
exhaust leak. replaced defective parts. 
93000 mi

US $1600
Head job due to broken timing belt. Did not replace timing belt at recommended 60K. 

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2002 Hyundai Sonata 4dr Sedan

181-horsepower 2.7L V6 4-speed shiftable automatic FWD

170000 mi head gasket, 

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2002 Hyundai Sonata 4dr Sedan

149-horsepower 2.4L I4 4-speed shiftable automatic FWD

120000 mi

US $85
Timing Belt and Balance Belt replacement. 
84000 mi

US $100
#3 cylinder had issues; replaced ignition coils. 
45964 mi adjusted serpentine belt tension, adjusted toe-in. 

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Hyundai Sonata Engine Problems

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 Hyundai Sonata problems occur, check out our car reliability stats.