2020 Hyundai Elantra problems

“The car went into 'limp mode' after rpm fluxuation. It's in the shop. Blake, a service manager at Temecula Hyundai, tells me it has "piston slap," which AI says is related to a piston ring recall for this car. Blake went on to say it has 2 power train issues (and needs a catalytic converter). NHTSA shows no recall, but whether engine or transmission, my daughter was nearly rear-ended due to this mechanical failure occurring on a two-lane highway at 55 mph. RE: Transmission (copied from Facebook): "Summarized by Meta AI " "Several 2020 Elantra owners describe shuddering, hesitation, and complete transmission failure at low mileage. Some report the car won’t accelerate from a stop or surges in RPM while cruising. Hyundai issued a recall for shifting issues that a software update can fix, but not all owners have been notified." It seems to me that the incident could have been transmission and the the engine 'piston slap' is conincidentally simultaneously discovered by Temecula Hyundai. Naturally, I conferred with AI as to the possibilities and found both transmission software recalls and a piston ring recall both a matter of record, but somehow not fully reported…”

“Transmission TCM/IVT had a service campaign recall #963 for TCM relearn / IVT replacement for premature transmission failure. Hyundai USA and dealership Big Star Hyundai of Friendswood, TX have made claims of the repair being done. Service records indicate there was no replacement, relearn or anything transmission related done with the vehicle and Hyundai USA has claimed on their end that their records show it was completed, but refuse to show or display records of completion, and have not maintained outreach to the dealership regarding maintenance records for this specific issue. Transmission has popped a P0867 code at 65,000 miles, just outside of it's warranty, and reflects the same codes listed for an issue regarding the TCM/IVT service campaign 963. The safety risk is the transmission giving way on a highway or some other location where it could potentially lead to an accident or stranding, that could lead to serious injury or death. This puts other vehicles on the road and passengers at high risk for an accident or incident. The problem has been reproduced by my husband, and confirmed with ECM readers. Independent service in Atascocita TX confirmed the…”

“Unknown and about 4 months ago my headlights stopped working one would go out I’d replace the bulb then the other goes out then a different bulb in my headlight would go out I’d replace it and it would go out again then the connectors were unresponsive then my height beams won’t engage leaving me with little to no light in order to operate my vehicle at night and oddly enough they would disengage while driving leaving me visually impaired while driving”

“2020 HYUNDAI [XXX], VIN: [XXX] Incident Description: On XXX I was pulling into a parking spot and had my foot firmly on the brake pedal. When I attempted to shift the vehicle into Park the engine suddenly revved up excessively. The vehicle then accelerated forward on its own and crashed into a building.”

“Steering wheel has been making whining noises when turning. Previously replaced worm shaft on steering while under warranty due to malfunction when first purchased. Issue has resurfaced but no longer covered under warranty. Dealer quoted nearly $800.00 to replace worm shaft.”

“I have a 2020 Hyundai Elantra Limited that was purchased new in December of 2020, has 17,764 miles, and no damage. At the end of May/early June of 2026, the car gave warning messages for the following: check forward collision avoidance assist system, check lane keep assist system, and check high beam assist system. The car was inspected by the dealership, from which it was purchased, on June 29, 2026. The technician report says error codes C1604 and C1606 were found and that the car required replacement of the front camera system at the cost of $1991.49. Front camera failure negates the ability to use the advanced safety features of this car. These features are so important to alert and, more importantly, assist the driver avoid accidents and improve all motorists safety. I have read numerous complaints depicting the same problem with this front camera system. Hyundai issued TSB 20-BE-006H due to multiple problems just like the one that happened to me. I have corresponded with Hyundai about this situation and my concerns on why a car with this few miles and no damage had a failure of this magnitude. They are unwilling to assist due to the warranty expiring 6…”