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Hyundai Automobiles With Theta 2 Engines

    • 2011–2019 Hyundai Sonata
    • 2013–2019 Hyundai Santa Fe Sport 
    • 2014–2015 and 2018–2019 Hyundai Tucson

Kia Autombiles with Theta 2 Engine

    • 2011-2019 Kia Optima.
    • 2012-2019 Kia Sorento.
    • 2011-2019 Kia Sportage.

New Lawsuits Pending - Excessive Oil

Nu, Gamma, Theta, Lambda and Kappa Engines

  • 2012-2020 Hyundai Elantra
  • 2009-2018 Hyundai Genesis Coupe
  • 2019-2021 Hyundai Kona
  • 2020-2021 Hyundai Palisade
  • 2010-2012 and 2015-2021 Hyundai Santa Fe
  • 2009-2010 and 2015-2021 Hyundai Sonata
  • 2011–2021 Hyundai Sonata Hybrid
  • 2010-2013 and 2015-2021 Hyundai Tucson
  • 2011-2021 Hyundai Veloster
  • 2020-2021 Hyundai Venue
  • 2010-2021 Kia Forte
  • 2017-2020 Kia Niro
  • 2011-2020 Kia Optima and Optima Hybrid
  • 2012-2021 Kia Rio
  • 2011-2020 Kia Sorento
  • 2012-2021 Kia Soul
  • 2011-2020 Kia Sportage
  • 2018-2021 Kia Stinger
  • 2022 Kia K5

Vehicles Below Prone to Catching Fire

    • 2011-2018 and certain 2019 model year Hyundai Sonatas;
    • 2013-2018 and certain 2019 model year Hyundai Santa Fe Sports;
    • 2014-2015, 2018 and certain 2019 Hyundai Tucsons;
    • 2011-2018 and certain 2019 Kia Optimas;
    • 2012-2018 and certain 2019 Kia Sorrentos;
    • 2011-2018 and certain 2019 Kia Sportages;
    • 2012 Hyundai Santa Fe (2.4L Theta II MPI engines)
    • 2011–2013 Hyundai Sonata Hybrid (2.4L Theta II MPI HEV engines)
    • 2016 Hyundai Sonata Hybrid (2.0L Nu GDI HEV engines)
    • 2015–2016 Hyundai Veloster (1.6L Gamma GDI engines)
    • 2014–2019 Hyundai Tucson (1.6L Gamma and 2.0L Nu GDI engines)
    • 2011–2013 Kia Optima Hybrid (2.4L Theta II MPI engines)
    • 2012 Kia Sportage (2.4L Theta II MPI engines)
    • 2012–2013 Kia Sorento (2.4L Theta II MPI engines)
    • 2012–2013 Kia Forte and Forte Koup (2.4L Theta II MPI engines)
    • 2014–2015 Kia Forte and Forte Koup (2.0L Nu GDI engines)
    • 2014–2015 Kia Soul (2.0L Nu GDI engines)
    • 2012–2019 Kia Soul (1.6L Gamma and 2.0L Nu GDI engines)
    • 2012–2019 Kia Rio (1.6L Gamma GDI engines)

Questions And Answers

The information below was compiled using online research and speaking to Techs at a Hyundai Dealership.  There is no public research available to definitively determine when an engine may fail, but there are some indicators as to the probability of a failure.

Based on the information available to me, oil management is the key to postponing or avoiding catastrophic engine failure. 

Using our oil contamination test you can determine if your engine is one of the engines that may fail due to blocked oil passage to the bearings or not.

What are the details of the settlement? – Click here to download a copy of the settlement from Hyundai’s website outlining the terms and conditions of the class action lawsuit; pay particular attention to;

      • Vehicle’s eligible 
      • Terms of eligibility
      • Compensation
      • Disqualifiers
      • Contact information

Can I request an engine before it fails? – Unfortunately, you cannot, but since there seems to be a direct link between oil consumption and the debris causing the wheel bearing to fail; using Hyundai’s oil consumption criteria worked for me as explained in the book worked for me.

What can I do to reduce the probability of failure? – Unfortunately, you can only slow the probability down,  changing the oil is key to postponing catastrophe.  Can you imagine lathering up with a bar of soap with grains of dirt embedded in it;  instead of a smooth layer of soap film, the soap would feel like sandpaper. 

The abnormal wear of the Theta II engine’s internal parts of the engine leads to fragments and debris clogging lubrication openings.  This occurs without warning and leads to catastrophic failure.

Changing the oil regularly is like rinsing dirt off of soap; the more you change the oil, the less likely the oil passageways will block the flow of oil to the bearings.

Vehicles with higher mileage, 60,000 plus the oil should be changed more frequently, (3,000 miles instead of the factory recommended change interval).

Is one model year better than another? – According to the Hyundai techs the vast majority of the engine exchanges they perform are the model years 2011 to 2015, but this does not exclude subsequent years.

What if I purchased a used model on the list and the engine fails for this reason? – If you purchased any of the models with the Theta II engine included in the suit, you are entitled to the extended warranty and other compensations outlined in the agreement. 

You will need to be able to provide supporting data that shows that from the time the vehicle was purchased, it has been maintained properly.

Should I purchase a used model Hyundai or Kia if it is on the list? – I recommend not purchasing any of the models on the list unless you can verify the original engine has been replaced.  This information should be available using a CarFax report or can be verified by a Hyundai, or Kia dealer.

Are there early signs of potential engine failure? – It seems there is a link between oil consumption and engine failure.

If your vehicle has been properly maintained and is consuming oil at an unusually high rate (1 quart per thousand miles or more), there is a high probability your engine is one of the engines that will fail one day.

Other signs include may include;

  • White smoke from the exhaust
  • Greasy exhaust burn in the exhaust pipe (only touch when the engine is cold)
  • Poor performance
  • Knocking
  • Misfiring
  • Rough idle
  • Hesitation while accelerating
  • Smell oil burning from the exhaust

Am I guaranteed a new engine, NO?

If you have maintained the vehicle properly since owning it, in all probability Hyundai will replace the engine if the failure is the result of the agreement. 

If the oil is low at the time the engine is taken apart to determine if the failure is due to debris blocking oil passageways to the bearings.

If you have not properly maintained the vehicle and have no records of maintenance since owning the vehicle, there is a high probability your claim will be denied;

If the vehicle has been involved in a substantial accident to the front end, your claim may be denied.