2007 Hyundai Sonata: sudden loss of power

6 of the 696 complaints about the 2007 Hyundai Sonata describe sudden loss of power.

owner complaints: 6
of this car's complaints: 1%
typical mileage: 100,000
recalls: 0

Is there a fix? 14 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2023
19
2022
2
2021
11
2020
6
2019
4
2018
20
2017
56
2016
53
2015
95
2014
42
2013
95
2012
84
2011
120
2010
3
2009
5
2008
5
2007
6
2006
3
2005
1
2004
2
2003
4
2002
2
2001
1
2000
6
1999
1
1996
1

What owners say

Filed Apr 20, 2021 · Electrical, Engine · 67,000 miles · NJ

Valve cover leaks onto alternator, can cause sudden power loss and premature alternator failure. I've been researching this issue and other people have had this exact thing happen. Apparently once you get the valve cover gasket fixed, it will fail again in another year or so. There is a defect either in the gasket or the valve cover mating surface. Currently my car is only at the stage of oil leaking from cover gasket and getting onto the alternator. No further failure has happened yet. My car has 67,000 miles.

Filed Mar 4, 2019 · Engine · 140,000 miles · SC

Oil leak from valve cover gasket dropped on alternator. Damage to alternator caused vehicle to shut off while going 60mph on an interstate. Multiple lights on the dash illuminated (including the engine and battery lights, the seat belt light started flashing), I lost power to the radio and the lights inside the car stopped working, quickly after these two issues started I lost the ability to accelerate (again, while going 60mph on an interstate). Verbatim text from complaint 14v415000 for the hyundai veracruz (including the model year 2007)- "an unexpected failure of motive power while driving increases the risk of a crash." I believe that this recall should be expanded to other hyundai vehicles as there are a number of other complaints online for sonatas for multiple years, including 2007. My local dealership quoted me $1372.43 to replace the alternator, valve cover gasket, and battery (attached).

Filed Jan 20, 2016 · Engine · 160,000 miles · NC

Traveling at 50 MPH highway off ramp. A rattling in the engine - broken rod - loss of power and no acceleration.

Filed Nov 7, 2013 · Acceleration, Engine · 38,000 miles · NJ

Case no. [xxx] I purchased my 2007 sonata from the denville, nj dealership in may 2007. With only 38,000 miles on odometer I had the scare of my life.driving on the highway, the engine died, and I lost all power. The 'check engine' light came on. Thankfully, I was able to pull to the shoulder of the road and safely stop the car. After 2 minutes I tried to restart the car. It started and I drove it home with the check engine light still on. I checked that all fluids were ok. Next day driving to work, coming down a long grade, car engine died and again I was fortunate that I did not get into an accident. I brought my car to a aaa service station and reported the problem. They checked and informed me that the problem is due to the throttle position sensor,(tps) which they found a tech service bulletin describing the symptoms and condition. They gave me a copy of said bulletin. They noted that even if they installed the part, I would have to have a hyundai dealer perform ecu software update. Therefore, I brought the car to the dealer and had them make the repair. I expected that this would be a 'recall' by hyundai, as failure of this part could be life threatening, as it was in my case. They said they could not honor any warranty service and I was charged $252.24. I requested and received the replaced part.. I am rasked hyundai motors of america to show good faith to a loyal customer, by reimbursing me for the costs associated with this known failing part.. Their response:" tsb are not recalls. Dealers are made aware of these and are asked to perform them on affected vehicles when they come in for other service. I vehicle outside of warranty, then the repair is an out of pocket cost to customer. They apologize for the inconvenience this may have caused." they refused to reimburse me saying this part was not a recall. How outrageous of them!

Filed Jul 16, 2012 · Fuel system · 76,000 miles · PA

The car began to lose power and stop running. Upon checking for repair the mechanic found that the wires leading to the fuel pump in the fuel tank were melted and that the fuel pump was encountering electrical shorting. Extreme fire hazard.

Filed Jul 6, 2012 · Engine · 100,000 miles · FL

Engine light went on then it started with a ticking noise, it got louder and lost power. I am told I need a new engine. It there any recall on this model cause I found quite a few people that have the same problem.