Intermittent no-crank, no-start condition. Dash lights illuminate, push-button start produces no response. Brake pedal applied. Vehicle becomes immobilized without warning. I’ve been stranded on multiple occasions. Unable to commute to work, or home. Most recently on December 19,2025 the car completely shut off while driving on the highway.
2018 hyundai Sonata electrical problems
severe 51 complaints filed with NHTSA · avg repair $850
Complaints
51
Recalls
0
Crashes
1
Avg fix
$850
What owners are reporting 5 most recent
We were heading to Lakewood NJ from Bucks County (North of Philly) . Car trouble w/ hybrid system on Rt 1, just past I-95. Got off @ Fairless Hills & took back roads. We could only go 20-30 mph. IDK how many times I pulled over. Several lights on, including "Check hybrid system. Turn Engine off", engine light, low tire pressure, battery & 3 other unidentifiable lights. I turned around to try t…
MY 2018 SONATA WILL NOT START WHEN TEMP DROPS BELOW 20 DEG F. IT HAS HAPPENED 3 TIMES THIS WINTER AND WHEN IT WARMS BACK UP TO 40 TO 50 DEGREE IT WILL START. WHEN I TURN THE KEY ON ALL THE LIGHTS ON THE DASH LIGHT UP LIKE NORMAL. I CAN MOVE HEAR SELECTOR AND TURN WHEEL. BUT THE STARTER WILL NOT ENGAGE NOTHING IS HEARD NOT A CLICK OR A SHIRT. IS THIS COMMON PROBLEM?
ENTERTAINMENT SCREEN TURNS OFF AFTER A WHILE AND WILL RESET OR I HAVE TO TAP IT AND MAKE SURE IT GOES BACK ON AND DOES THIS OVER AND OVER AT TIMES. SMOKE COMES OUT EXHAUST WHEN PASSING A CAR SOMETIMES
The contact owns a 2018 Hyundai Sonata. The contact stated that the vehicle failed to start in cold weather, below 50 degrees Fahrenheit. The contact stated that the vehicle would start as needed whenever the weather was warmer. The vehicle was taken to an independent mechanic, where it was diagnosed; however, the cause of the failure could not be determined. The dealer was notified of the failure…
Common questions
How serious is the electrical problem on the 2018 hyundai Sonata?
It's a meaningful issue. 51 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
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.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. 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.
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