Engine failure?

Tiny
SELRUF84
  • MEMBER
  • 2017 HYUNDAI SONATA
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 138,458 MILES
I own the vehicle listed above SE. When I purchased the vehicle, it had 109,000 miles which is a lot for a vehicle that was purchased in 2021. 25 days after I drove my car off the lot, I started to experience A loss of power that would prevent my car from accelerating past 40 MPH. I had my car towed to the dealership and I was denied a new engine to be installed, if anyone is aware of the Theta engine class action lawsuit that happened in 2019. My car should have had a new engine installed. Instead, a used engine was installed, and I was told that my car did not qualify for a new engine because the number four cylinder having low compression had nothing to do with the rod bearings. I was informed by a few different people that the number four-cylinder having low compression ties to rod bearings and the short and long block. I still continue to have the same issue today of the loss of power, stalling of vehicle while driving poor fuel economy, and knocking noises from the engine. Could I be having the same issue?
Wednesday, December 4th, 2024 AT 10:23 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,289 POSTS
Yes, it looks like you got the bad engine. The lawsuit focused on manufacturing defects in Hyundai's Theta II engines, particularly with metal debris in the oil passages and bearing wear. I would call the Hyundai customer service line to see what they can do.

1 (800) 633-5151

Let us know how it goes.
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Wednesday, December 4th, 2024 AT 11:43 AM
Tiny
SELRUF84
  • MEMBER
  • 2 POSTS
Hi Ken L,

Thank you for getting back to me.
The attorney handling the first Theta Engine lawsuit has requested a diagnosis of the rod bearing failure. Unfortunately, I only have the documentation provided to me when the engine was replaced with a used one in 2021. I have attached the receipt from the dealership for your reference.
Hyundai Motor America informed me that the low compression in the #4 cylinder did not qualify my vehicle for a new engine replacement. Furthermore, my car did not qualify for a warranty due to its high mileage.
I'm not sure how I will be able to obtain any documentation that would prove that the #4 cylinder is part of the qualified engine failure.
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Wednesday, December 4th, 2024 AT 1:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,289 POSTS
Yep, the O'l dealer loophole. I don't know if you can get them to replace the engine with these kinds of restrictions. Sorry about that, at least you tried. Let me know if I can help with anything else.
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Thursday, December 5th, 2024 AT 1:05 PM

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