2021 HYUNDAI SONATA HYBRID Complaints and Recall Information
The 2021 HYUNDAI SONATA HYBRID has 5 complaints and 0 recalls filed with NHTSA. Owners most frequently report coolant leaks into the exhaust system causing engine overheating and warning lights. Several complainants mention extended repair times and difficulties obtaining replacement parts. Some describe repeated failures despite previous repairs and express safety concerns due to the risk of vehicle breakdown in adverse weather conditions.
Common Issues- Coolant leaks. Multiple reports describe coolant leaking into the exhaust system leading to white smoke from the tailpipe and dropping coolant levels, which results in engine overheating.
- Engine overheating. Overheated engine alarms activate on highways and during adverse weather, sometimes leaving the vehicle undrivable until repaired.
- Extended repair time. Repairs have required multiple visits to dealerships and parts have frequently been on backorder, causing delays of several weeks.
- Temporary fixes. Several owners report repairs that address symptoms temporarily but fail to resolve the underlying defect, leading to recurrence of leaks.
- Warning lights. Engine warning lights illuminate with each episode of coolant leaks and overheating, alerting drivers to malfunctioning systems.
- Technical service bulletin (TSB). Hyundai issued TSB 23-EM-009H addressing the center muffler part related to the coolant leak defect, but owners report no recall or manufacturer-wide fix.
- Broken water shield. A part designed to prevent water intrusion into the muffler was found broken in at least one case, contributing to overheating.
- Safety concerns. Owners highlight risks of being stranded in severe weather due to sudden engine overheating and coolant loss.
- Cost of repairs. One complaint describes repair costs around $2,300 related to replacing defective parts and addressing coolant leaks.
- Heating issues. Some owners report the heater blowing cold air despite being set to heat prior to engine overheating incidents.
2021 HYUNDAI SONATA HYBRID Summary
2021
Model Year
5
Total Complaints
0
Total Recalls
0
Vehicles Affected
Recalls
No recalls found.
Complaints
2021 HYUNDAI SONATA HYBRID
ID: 2071863ENGINE
Overheated engine alarm came on while I was on the freeway on a rainy day. Vehicle was towed to Hyundai dealership in which service technician found that the part preventing water from leaking into the muffler was broken. Hyundai dealership has ordered replacement part but it is on backorder. The broken part that needed replacement has been on backorder for close to a month and there is not an ETA of when the part will be received. Prior to the overheated engine alarm going off, cold air was blowing out of the vents even when the heat option was selected.
2021 HYUNDAI SONATA HYBRID
ID: 2070911ENGINE
Coolant system leaks in to the engine or exhaust system, which is evident in white smoke exhaust and coolant level dropping. In my situation, I required an entire container of coolant to perform a daily commute, and the reservoir was empty by the time I made it to the dealership. Car is rendered undrivable due lack of coolant and engine overheating. My car was in the dealership repair facility for 6 weeks awaiting parts on back order due to nationwide shortage. A technical service bulletin has been issued for this manufacturer defect (23-EM-009H). Cost of repairs was roughly $2,300.
2021 HYUNDAI SONATA HYBRID
ID: 2056864ENGINE
My 2021 Hyundai Sonata Hybrid seems to be leaking coolant into the exhaust system. Various reports online indicate that this is a consistent issue with 2020-2022 Hyundai Sonata Hybrid models. A lot of the reports indicate that owners have tried getting theirs cars repaired for the same issue I have a various dealerships all across the US, but either haven't had any luck or have had a temporary fix for the issue, which proceeded to occur again every couple of months. I personally have had my car inspected by my personal dealership and they have confirmed the issue and have mentioned that other owners have brought theirs in to be checked out, but haven't really had luck. I believe that Hyundai should take responsibility for this and issue a recall on the affected models. I bought the car in good faith hoping for reliability but haven't had it for even 6 months now and this problem is here. For safety or myself and others on the road, this models of the Sonatas need to be recalled and repaired IMMEDIATELY. For reference, here is a reference for the complaints people have made online regarding the vehicle: 1. [XXX] 2. [XXX] . (THE RESPONSES HERE ARE VERY DETAILED) [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
2021 HYUNDAI SONATA HYBRID
ID: 2056863UNKNOWN OR OTHER
My 2021 Hyundai Sonata Hybrid seems to be leaking coolant into the exhaust system. Various reports online indicate that this is a consistent issue with 2020-2022 Hyundai Sonata Hybrid models. A lot of the reports indicate that owners have tried getting theirs cars repaired for the same issue I have a various dealerships all across the US, but either haven't had any luck or have had a temporary fix for the issue, which proceeded to occur again every couple of months. I personally have had my car inspected by my personal dealership and they have confirmed the issue and have mentioned that other owners have brought theirs in to be checked out, but haven't really had luck. I believe that Hyundai should take responsibility for this and issue a recall on the affected models. I bought the car in good faith hoping for reliability but haven't had it for even 6 months now and this problem is here. For safety or myself and others on the road, this models of the Sonatas need to be recalled and repaired IMMEDIATELY. For reference, here is a reference for the complaints people have made online regarding the vehicle: 1. [XXX] 2. [XXX] . (THE RESPONSES HERE ARE VERY DETAILED) [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
2021 HYUNDAI SONATA HYBRID
ID: 2055094ENGINE
EHRS Coolant Leak- problem started in [XXX] when engine overheated. The weather in Michigan in inclement and being stranded in the intense cold can lead to loss of life. I had it towed to a Hyundai dealership that was unable to find the problem and in attempting to "find a leak" used the incorrect dye, necessitation transferal to another more competent dealership where the problem was diagnosed and was fixed with a replacement part. In December 2023 a TSB 23-EM-009h was issued by Hyundai describing this problem and issuing a part (Center Muffler). I was not informed and the problem recurred. currently this is the third episode and Hyundai after paying 95% of the previous cost, now only agrees to pay 85% and denies reimbursing me for the car rental. Warning lights appeared with all 3 occurrences. Hyundai should have issued a recall to obviate this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)