Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing and, if necessary, replace the starter magnetic switch (solenoid) assembly.
full bulletin at NHTSA ↗2021 Hyundai Elantra electrical problems
moderate Owners of the 2021 Hyundai Elantra have filed 25 NHTSA complaints about the electrical at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Complaints
25
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2017 Elantra | 92 |
| 2018 Elantra | 38 |
| 2019 Elantra | 33 |
| 2020 Elantra | 21 |
| 2021 Elantra (this page) | 25 |
| 2022 Elantra | 13 |
| 2023 Elantra | 16 |
| 2024 Elantra | 11 |
1fire
When does it fail?
Of the 25 electrical complaints filed for the 2021 Hyundai Elantra, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 25 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Electrical accounts for 20% of all owner complaints filed against this vehicle, across 9 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information related to the changes introduced in the 2025 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system as described in this TSB.
full bulletin at NHTSA ↗This bulletin provides information related to the changes introduced in the 2024 2nd Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2024 2nd Navigation Map and Software Update Improvements section in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater (NAU) and updated by USB. The NAU website is https://update.hyundai.com/US/EN/navigationUpdate. For certain models equipped with a relevant Bluelink package, the software may be downloaded and applied via OTA update.
full bulletin at NHTSA ↗Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.
full bulletin at NHTSA ↗Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon's communication network. If you are experiencing issues with remote commands, or other Bluelink services, please see the instructions below to reestablish the connection via the AVN pinhole reset method.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2021 Elantra's electrical system generates a pattern of hard-to-diagnose failures. Backup camera malfunctions are the clear leader—units freeze, display static or distorted lines, show outdated footage, or fail entirely. One owner reported the camera displaying a closed garage door image while the door was actually open, creating a real collision risk in reverse.
Warning light clusters activate without clear triggers. Check Engine, Forward Safety System, and Smart Cruise Control warnings illuminate unprompted, sometimes disabling critical safety features like power steering and collision avoidance. Dealers record error codes but consistently report inability to pinpoint the cause. One Hyundai case remains unresolved; another owner notes the same issue triggered a recall in Korea but not in the U.S.
Horn failures are routine—one owner replaced it six times. Infotainment and connected services leak false alerts: MyHyundai app claims doors are unlocked when they're not, remote start fails with phantom "door open" messages, and navigation cuts out intermittently. A few extreme complaints describe the integrated thermal management module burning out at 76,000 miles (warranty denied), a parked vehicle catching fire from assumed electrical cause, and cascading electrical failures triggered by a single faulty backup camera.
One owner has visited the dealer 30+ times in a few years for electrical repairs. Warranty coverage disappears at 60,000 miles regardless of when defects first appeared.
Same Hyundai Elantra electrical reports on nearby years: 2018 · 2019 · 2020 · 2022 · 2023
Failure modes owners describe
Backup camera malfunction
Backup camera displays frozen images, static, distorted lines, discoloration, delayed feed, or complete blackout. In some cases, the camera shows outdated footage or fails entirely when in reverse.
When: Between 10,500 and 76,000 miles; some complaints undated
Symptoms owners cite: Frozen or delayed camera images; Static or glitchy display with distorted lines; Screen half on/half off; Outdated footage displayed (image from minutes prior); Complete failure to display video feed
Repairs/costs cited: Dealer typically confirms camera is defective; repair requires replacement. Owner #3 notes safety risk if driver unaware of malfunction.
Instrument cluster and warning light malfunctions
Warning lights, particularly Check Engine, Check Forward Safety System, and Check Smart Cruise Control, illuminate unexpectedly and sometimes cannot be cleared. Computer codes recorded but root cause not identified by dealers.
When: Early ownership (under 10,000 miles in one case); around 55k miles in another
Symptoms owners cite: Check Engine light activation; Check Forward Safety System warning; Check Smart Cruise Control System warning; Power steering loss concurrent with warning lights; Safety features disable when lights appear; Warning lights recur after dealer reset
Codes mentioned: Computer codes recorded by dealership but causes not identified
Repairs/costs cited: Dealerships reset error codes and record them but report inability to diagnose root cause. One owner's wife refused to drive vehicle due to recurring issue.
Recalls/TSBs owners mention: Hyundai case number established for owner #1; case worker reportedly difficult to reach. Owner #5 notes identical recall issued in Korea but not in U.S.
Integrated thermal management module failure
Module burns out prematurely, triggering check engine light. Part is critical to engine cooling system; premature failure poses risk of coolant loss and engine damage or fire.
When: 76,000 miles
Symptoms owners cite: Check Engine light; Module burnt out (confirmed by dealer)
Repairs/costs cited: Part replacement performed by dealer next business day. Cost: owner paid out-of-pocket (warranty did not cover). Dealer advised not to drive vehicle until repair due to engine fire risk.
Recalls/TSBs owners mention: Warranty denial; Hyundai refused to assist with repair cost. Owner notes identical failures reported by other owners.
Smart Cruise Control and forward collision avoidance system failure
Smart Cruise Control system becomes inoperable and Forward Safety System warning activates, disabling collision avoidance alerts. Issues occur without warning.
When: Undated mileage; complaint notes issue has been subject to recall in Korea
Symptoms owners cite: Check Forward Safety System warning light; Check Smart Cruise Control System warning light; Smart Cruise Control does not function; Forward collision alert system disabled
Recalls/TSBs owners mention: Identical issue addressed by recall in Korea for same model/year; no recall issued in U.S. as of complaint date. Owner requests manufacturer recall and cost reimbursement.
Lighting system intermittent operation (DRL, headlights, turn signals, wipers)
Daytime running lights, headlights, turn signals, and wipers turn on/off randomly. High beams engage randomly without input. Issues recurring after warranty coverage expires.
When: Started November 2025; dealership first visit January 2026 (3.5 months later)
Symptoms owners cite: Daytime and nighttime running lights turn off/on randomly; Brights engage randomly without input; Turn signals not operating intermittently; Wipers not operating intermittently
Repairs/costs cited: Multifunction switch identified as defective at first dealership visit. Initially covered under warranty; warranty status changed at later appointment (3.5 months later).
Recalls/TSBs owners mention: Owner notes Hyundai Genesis has a known safety concern with identical issue and has extended warranty; requests Elantra be reviewed for same coverage.
Vehicle fire while parked (assumed electrical)
Vehicle caught fire while unattended in a parked position. No injuries reported. Cause assumed to be electrical by insurance; not diagnosed by manufacturer.
When: 24,000 miles
Symptoms owners cite: Vehicle fire
Repairs/costs cited: Vehicle declared total loss by insurance. Not inspected or repaired by dealer.
Recalls/TSBs owners mention: Manufacturer contacted; no assistance provided.
Limp mode / sudden loss of power while driving
Vehicle decelerates and loses motive power, entering limp mode while driving at low speed. Vehicle taken to dealer three times without diagnosis or repair.
When: 61,000 miles
Symptoms owners cite: Vehicle deceleration at 30 MPH; Loss of motive power; Vehicle enters Limp Mode
Repairs/costs cited: Dealership visits (3x) did not result in diagnosis or repair.
Recalls/TSBs owners mention: Manufacturer case filed; no resolution noted.
Engine stalling in idle stop-and-go mode
Engine shuts off while vehicle is in automatic stop-and-go idle mode, even with auto-idle disabled. Occurs on highway and city driving. Creates safety hazard as following vehicles unaware of stall.
When: Undated; occurring frequently at time of complaint
Symptoms owners cite: Engine shuts off during idle stop-and-go; Occurs even with auto-idle disabled; Occurs on freeway at speed; Dashboard message instructs driver to put car in park/neutral and restart
Horn failure (repeated)
Horn stops working intermittently or completely. One owner reports six replacements over ownership period.
When: Multiple occurrences over ownership; owner #9 reports 6 horn replacements
Symptoms owners cite: Horn does not function; Safety hazard as other drivers cannot hear warning
Repairs/costs cited: Horn replacement performed under warranty in early ownership; owner #9 reports 6 replacements.
Cruise control sudden acceleration
While cruise control is engaged on open road at 55 MPH, vehicle suddenly accelerates to 75 MPH without driver input. Occurs shortly after front radar unit replacement.
When: Under 10,000 miles; incident occurred in June/July 2023 (shortly after radar replacement at 8,295 miles on 7/26/2023)
Symptoms owners cite: Unintended acceleration from 55 to 75 MPH while cruise control active; Auto braking failed in June 2023
Repairs/costs cited: Front radar unit replaced by Hyundai on 7/26/2023 at 8,295 miles; issue persisted after replacement.
Backup sensors and camera failures causing false braking
When reversing, backup sensors trigger automatic braking even when no object or vehicle is behind. Occurs concurrently with camera failure. Sensor codes recorded by dealer but no corrective action taken.
When: Undated
Symptoms owners cite: Backup sensors activate and brake vehicle without obstruction; Backup camera does not function; Backup sensor code appears on diagnostic scan
Codes mentioned: Backup sensor code recorded
Repairs/costs cited: Dealer confirmed backup camera defective; sensor code recorded but no repair action taken.
Infotainment and connected services glitches
MyHyundai mobile app and vehicle display show phantom alerts and missing features. App displays doors as unlocked when locked; false notifications of unlocked doors; navigation cuts off; menus missing; remote start fails with false 'door open' message.
When: Within weeks of purchase (August 2021 for owner #1)
Symptoms owners cite: MyHyundai app shows doors unlocked when they are locked; False notifications of unlocked doors via email; App lock command returns false 'door open' message; Navigation display cuts off intermittently; Missing menu items in center display (door light, reset gas mileage); Remote start application fails with false 'door open' alert; Radio flashing and going blank
Repairs/costs cited: Ongoing issues; vehicle required return to dealer for repairs.
Driver safety system and brake system lock-up
When starting vehicle, all driver safety system warnings illuminate simultaneously, wheels lock, and brake system locks up. Issue occurs intermittently and has been captured on video by owner.
When: Undated
Symptoms owners cite: All driver safety systems show warning on startup; 'Car is not safe to drive' message appears; Multiple warning lights illuminate; Wheels lock; Brake system locks up
Repairs/costs cited: Owner captured incident on video but could not upload. Occurred twice at time of complaint.
System reboot while driving (dash shutdown/restart)
While driving on freeway at highway speed, vehicle's dash computer and systems shut down and restart. Vehicle slows and coasts during event.
When: Undated; around 70 MPH highway driving
Symptoms owners cite: Dashboard computer shuts down; Dashboard computer restarts; Vehicle slows and coasts; Loss of power during event
Door handle illumination failure
Driver's side door handle light does not illuminate when approaching vehicle at night.
When: Within weeks of purchase (August 2021 for owner #1)
Symptoms owners cite: Driver's door handle light not working at night when approaching door
Repeated electrical/wiring defects attracting animal damage
Vehicle's wiring is repeatedly chewed by squirrels after repair. Same wiring damaged twice in quick succession (within one week of vehicle return from initial repair). Suggests wiring design or insulation defect that makes it vulnerable to animal damage.
When: After initial repair; second damage within one week of vehicle return
Symptoms owners cite: Temperature coolant sensor wiring chewed by squirrel; Wiring damaged again within one week of repair
Repairs/costs cited: Initial repair required six-week rental period. Second repair needed shortly after vehicle returned. Owner notes two rental vehicles parked in same location for six weeks experienced no animal damage.
Fuel economy display malfunction
Gasoline consumption computer resets intermittently without driver input; other times fails to reset when requested.
When: Within weeks of purchase (August 2021 for owner #1)
Symptoms owners cite: Fuel economy computer resets sometimes without input; Other times fails to reset when driver tries
Headlight failure cascading from backup camera issue
Backup camera failure appears to trigger cascading electrical failures including headlight outage, dash lights going out, and false safety sensor activation.
When: 10,500 miles
Symptoms owners cite: Backup camera not working; Headlights go out while driving; Dash lights go out; Safety sensors sound false alarms for no reason
Repairs/costs cited: Dealer confirmed backup camera is bad but could not diagnose cascade of other failures. Owner cannot drive at night or in bad weather due to headlight loss.
Excessive warranty repairs and electrical rewiring needs
Vehicle has required 30+ shop visits for electrical issues, horn replacements, blower motor replacements, and seat belt failures. Dealership denies warranty coverage on later repairs citing mileage (60,000+) and requests $600 for rear electrical rewiring and $1,500 for driver seat belt repair.
When: Purchased 5/2021; 60,000+ miles at time of complaint
Symptoms owners cite: Electrical failures (rear); 6 horn replacements; 6 blower motor replacements; Front driver seat belt failure; Rear electrical wiring issues (recurring)
Repairs/costs cited: Dealership denies seat belt repair coverage citing mileage over 60,000 (no warranty). Quotes $1,500 for driver seat belt repair; $600 for rear electrical rewiring.
Recalls/TSBs owners mention: Dealership warranty denial on seat belt repair after 60,000 miles, despite prior reported issues.
Synthesized from 25 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
The reverse camera does not work
When driving at 55MPH with cruise control on, the car suddenly accelerated to 75MPH, this happened on the open road and was able to keep under control. Auto has less than 10,000 miles. I will be contacting Hyundai customer service for a case number on this incident. First indication of a problem was cruise control, auto braking failed iin June of 2023. This follows a replacement of defective…
Odometer Fraud. The contact purchased a 2021 Hyundai Elantra. The contact stated that it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the mileage was 51,192 and at the time of receiving the vehicle from the dealer it was discovered that the mileage was 50,310.
Had electrical trouble with your 2021 Hyundai Elantra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2021 Hyundai Elantra?
It's a documented issue but not catastrophic. 25 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 25 complaints filed, electrical issues most often appear around 45,397 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2021/Hyundai/Elantra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.