2021 Hyundai Elantra Engine cooling Problems
- Complaints
- 3about this part
- Share
- 2%of 132 total for the year
- Median mileage
- 39,573miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2021 Hyundai Elantra, 2% of the 132 complaints for this model year. Where a mileage was given, the median is 39,573 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2021 Hyundai Elantra. The contact stated that while driving at an undisclosed speed, the vehicle overheated. The vehicle was taken to the dealer, who informed the contact there was a crack on the radiator. Additionally, the dealer determined that the failure was possibly collision related; however, the contact stated that the vehicle was not involved in a collision. The manufacturer was not made aware of the failure. The failure mileage was 39,573.”
NHTSA complaint #11512434, filed 2023-03, 39,573 miles“The contact owns a 2021 Hyundai Elantra. The contact stated that while driving approximately 70 MPH, there was an abnormal sound coming from the vehicle. No warning lights were illuminated. The vehicle was towed to a dealer to be diagnosed; however, the cause of the failure was not determined. The vehicle was not repaired. The vehicle was towed back to the dealer to be diagnosed; however, the cause of the failure was still not yet determined. The vehicle was not repaired. …”
NHTSA complaint #11731188, filed 2026-04Related service bulletins
- 10252354Mar 4, 2024This bulletin contains the software update procedure for the Engine Control Unit (ECU) on certain 2021-2023MY Elantra (CN7) and 2022-2023MY Kona (OS) vehicles equipped with the…
- 10247189Oct 13, 2023This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
- 10243340Sep 18, 2023This bulletin is issued to provide the extended battery diagnosis procedure using GDS-M. This battery diagnosis function displays the various battery-related faults such as: ⢅
- 10217251Jul 28, 2022Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or…
- 10210210Mar 31, 2022On certain 2021 Elantra and 2022 Kona vehicles equipped with 2.0L engine, a coolant leak at the Water Temperature Sensor (WTS) may be observed due to machining burrs at the…
- 10199097Jun 21, 2021On certain 2021-2022 Elantra vehicles, a coolant leak at the Water Temperature Sensor (WTS) may be observed due to machining burrs at the mounting port of the cylinder head…
- 10196551May 27, 2021This bulletin provides information related to the Engine Control Module (ECM) software update for 2021MY Elantra (CN7/CN7A) vehicles equipped with the 2.0L engine to update the…
- 10190044Mar 30, 2021This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance…
- 10189989Mar 10, 2021This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below.
- 10189981Mar 5, 2021This bulletin provides the service procedure to update the Transmission Control Unit (TCU) software for certain Elantra (CN7/CN7a) vehicles equipped with the 2.0L MPI and…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 1 | 1% |
| 2021 | 3 | 2% |
| 2020 | 3 | 1% |
| 2019 | 4 | 2% |
| 2018 | 4 | 1% |
| 2017 | 4 | 1% |
| 2016 | 3 | 1% |
| 2015 | 3 | 1% |
| 2014 | 2 | 1% |
| 2013 | 3 | 0% |
| 2012 | 2 | 0% |
| 2011 | 5 | 1% |
| 2010 | 5 | 1% |
| 2008 | 17 | 5% |
| 2007 | 7 | 3% |
| 2006 | 4 | 3% |
| 2005 | 6 | 4% |
| 2004 | 11 | 6% |
| 2003 | 21 | 9% |
| 2002 | 11 | 3% |
| 2001 | 19 | 6% |
| 2000 | 43 | 22% |
| 1999 | 22 | 17% |
| 1998 | 12 | 22% |
| 1997 | 20 | 17% |
| 1996 | 20 | 20% |
| 1995 | 20 | 18% |
| 1994 | 8 | 11% |
| 1993 | 5 | 21% |
| 1992 | 8 | 28% |
Other parts of the 2021 Hyundai Elantra
32 complaintsElectrical system
31 complaintsOther or unknown
30 complaintsSeat belts
27 complaintsEngine
13 complaintsVehicle speed control
10 complaintsBrakes
8 complaintsTransmission and drivetrain
7 complaintsLane departure
6 complaintsVisibility (wipers, defrost, mirrors)
6 complaintsExterior lighting
5 complaintsSteering
5 complaints
← All problems reported for the 2021 Hyundai Elantra
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology