O'FALLON, Mo. — If you drive a Kia or Hyundai you may be one of the thousands of drivers eligible for a limited lifetime warranty for a free engine replacement on your car, but there’s a catch. Check also the general problems across all Kia car models. Causes and Solutions for Loud Engine Noise and Sluggish Acceleration in a Kia Rio. One theory is that the Kia Rio is not designed to run at its best under 1700rpm. One owner claims to have fixed the loud engine noise by manually shifting the automatic transmission beyond 2500rpm. 4. Problem with the engine. Another common problem Kia Niros have is the engine. If you own the Kia Niro Hybrid, expect it to have a different problem from the gas engine. Most Niro Hybrids do not start under 10 degrees. When you take your car back to Kia dealers. They will likely tell you that most Kia Niro Hybrids have this common problem. I have researched this and it is a common problem with this engine. Many have caught on fire. Kia sent out to the dealerships a Technical Service Bulletin, Number 203, on March, 2019, for Model This issue is serious on their 2.4L and 2.0L turbo GDI gasoline engines. The problem occurs due to a manufacturing defect on the crankshaft. Q: Has Hyundai fixed their engine problems? Hyundai and KIA have collectively recalled over a million cars to correct the engine problem, especially on the Theta II series. 3. Complete or Partial Engine Failure. This problem is associated with the Kia Forte, K900, Sedona, and Sportage. We have a list here of the best Kia Forte models and years to avoid. Kia is commendable for its powerful engines, however, many complaints have risen that make their engine reliability questionable. 5 days ago · Overall Reliability. We expect the 2024 Carnival to be more reliable than other new cars. This prediction is based on the Kia brand scores. The 2022 Kia Carnival has been recalled 4 times by NHTSA Kia's Sorento, Optima, and Sportage account for the bulk of the problems. Many Kia drivers have reported engine failures, but what's even more worrisome is the fact that it can happen while the uoRl.