The motor needs replacement only after 55,000 kms – We bought a 2013 Elantra second hand in late 2016 from a dealer with just under 30,000 kms on it. It also had nearly 2 years of warranty remaining. It worked well till about 6 months ago (so about a year after the warranty ran out) when I started hearing this rattly noise. After showing it to our mechanic, he advised us that this is a problem with a motor (piston slapping) and apparently its quite common with Elantras. So this car is 6 years old, has done only 55,000 kms and needs a motor replaced. It has only been used lightly (did less than 30,000 kms in 3 years since 2016) to travel from home to work, school pick-ups/drop-offs and occasional shopping.

We contacted Hyundai dealer, the cost of replacing a motor is 9,500$. Hyundai Australia essentially told us it is our own problem and (even though this is a manufacturing defect) they are not going to contribute in any way to the motor replacement. We looked at the option of taking them to the ombudsman but it looks like it's a very long and hard process and we just don't have the energy to do it at the moment and we need a working car. We are replacing the motor with a second-hand one hoping we don't run into the same issue again. It's going to cost us 2,500$. Based on the customer service and the size of the problem we are certainly never buying a Hyundai again and definitely not recommending it to anyone.