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 Santa Fe electrical problems
severe Owners of the 2021 Hyundai Santa Fe have filed 23 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
23
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2017 Santa Fe | 54 |
| 2018 Santa Fe | 7 |
| 2019 Santa Fe | 18 |
| 2020 Santa Fe | 21 |
| 2021 Santa Fe (this page) | 23 |
| 2022 Santa Fe | 23 |
| 2023 Santa Fe | 28 |
| 2024 Santa Fe | 19 |
| 2025 Santa Fe | 20 |
1crash
1fire
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 ↗A class settlement against Hyundai Motor America (“HMA”) that had alleged that certain 2011 – 2022 model year Hyundai vehicles that were not equipped with an engine immobilizer (called the “Class Vehicles”) contain design flaws, including the failure to manufacture the Class Vehicles with an anti-theft device called an engine immobilizer, that make them susceptible to theft and damage. Class Vehicles manufactured without an engine immobilizer have traditional “turn-key-to-start” ignition systems.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of the 2021 Hyundai Santa Fe report backup and front camera systems failing intermittently or completely, with one owner citing a $2,400 replacement cost. One camera failed again within four days of recall repair. Horn assemblies fail repeatedly—some owners report multiple replacements within months or by 14,000 miles, with no warning before failure.
Engine stalling occurs without warning lights or diagnostic codes, particularly with Idle Stop-Start enabled. Some owners experienced stalls at traffic lights or while accelerating. One owner received a recall for loss of power and reported the exact defect recurred within miles of the repair.
Battery depletion leaves vehicles unable to shift transmission or engage the emergency brake, creating roadway hazards. Multiple owners report chronic dead batteries requiring jump-starts every few days despite passing dealership tests. One owner's seat moved forward and reclined into the dashboard spontaneously while parked. Brake systems exhibit twitching and grinding with multiple warning lights that don't clear. A 12V phone charger connector melted a charging cord, creating fire risk. False collision warnings trigger unintended emergency braking at highway speeds with no traffic threat present.
Same Hyundai Santa Fe electrical reports on nearby years: 2019 · 2020 · 2022 · 2023 · 2024
Failure modes owners describe
Backup and Front Camera System Failure
Rearview backup camera and front camera systems fail intermittently or completely. Backup camera displays black screen, static lines, or no image when in reverse. Front camera failure disables advanced safety features and triggers persistent dashboard warning that cannot be dismissed.
When: Early in vehicle life; #2 occurred within 4 days of recall repair; #1 had extended intermittent failures
Symptoms owners cite: Black screen on backup camera; Static lines on camera display; No rearview image when in reverse; Front camera completely non-functional; Persistent dashboard warning alert for front camera failure; Warning alert cannot be dismissed
Repairs/costs cited: Front camera replacement quoted at $2,400 (#1). Backup camera replaced under safety recall in #2, but failed again within 4 days of repair.
Recalls/TSBs owners mention: Recall repair performed (#2), but defect persisted. Dealership could not duplicate issue at inspection and requested diagnostic fee (#2).
Backup Camera Intermittent Failure After Recall
Rearview backup camera continues to fail intermittently even after being replaced under a safety recall. Displays blank/black screen when shifting into reverse.
When: Prior to recall repair and continuing within 4 days after recall component replacement
Symptoms owners cite: Blank/black screen when shifting into reverse; No rearview camera image displayed; Intermittent failure pattern; No warning lamps
Repairs/costs cited: Camera replaced under safety recall; malfunction continued. Video documentation exists of malfunction occurring after recall repair.
Recalls/TSBs owners mention: Safety recall performed; however, defect persisted post-repair. Dealership stated inability to duplicate issue and requested diagnostic fee despite video evidence of malfunction.
Battery Depletion and System Failure Cascade
Battery depletes to critically low levels, rendering multiple safety-critical systems non-functional. Engine Stop-Start function activates despite insufficient battery charge, preventing engine restart. Loss of power to transmission shift and emergency brake engagement during critical moment on roadway.
When: After initial battery depletion event; repeated jump attempts required
Symptoms owners cite: Battery too low to activate lights or locks; Insufficient battery to turn starter motor; Single jump from older vehicle insufficient after 20+ minutes; Battery state-of-charge and state-of-health less than 30%; Engine Stop-Start function activated without sufficient battery power for restart; Loss of power to engage transmission PARK; Loss of power to engage emergency brake; Only non-power-assisted service brake marginally functional; Vehicle at risk of rolling in traffic
Repairs/costs cited: Battery replaced at dealership without comment on systemic failure of power-dependent safety systems.
Horn Assembly Repeated Failure
Horn assemblies fail repeatedly, requiring multiple replacements. Right horn typically fails first, followed by left horn. No warning indication before failure. Horn failures occur without pattern throughout vehicle ownership.
When: Multiple replacements required: #4 reports 4 service visits (Dec 2025, Jan 2026, and more); #14 reports horns last 1-2 months and replaced 5 times; #20 reports 3 replacements by 14,000 miles; #21 reports 2 replacements before warranty expiration
Symptoms owners cite: Single or both horns inoperable; No warning indication of failure; Right horn fails first, then left; Non-functional horn when needed; Repeated failures across multiple units
Repairs/costs cited: #4 quoted $400 for horn service; #14 states horns last 1-2 months; #20 at 14,000 miles with 3 replacements; #21 failed twice before warranty end.
Recalls/TSBs owners mention: #4 notes TSBs exist for other Hyundai models (TSB 24-BE-018H and 25-BE-005H) for similar horn failures, but these TSBs have not been applied to Santa Fe line as of complaint date.
Vehicle Stall and Shutdown During Operation
Engine stalls or shuts down intermittently while vehicle is operating or stationary. Issue often occurs when Idle Stop-Start (ISG) function is activated. Vehicle may restart but issue recurs without pattern. No diagnostic codes or warning lights appear during events.
When: #5 at 20,000 miles at traffic light; #6 began Sept 2022 (roughly 1.5 years after purchase), occurring dozen+ times in 2-month period; #8 while accelerating from stop sign; #16 mostly when placing transmission in park, once during motion
Symptoms owners cite: Engine turns off and on intermittently; Vehicle stalls with Idle Stop-Start (ISG) ON; Vehicle shudders before stalling; No warning lights illuminated; No diagnostic error codes found; Engine stalls while accelerating from stop; Engine stalls in middle of avenue; Engine makes noise for few seconds after stall events; Stalling occurs while stationary at traffic light
Repairs/costs cited: #6 had ECM update attempted at dealership; no improvement in stalling. #5 and #16 dealership unable to find faults or diagnose issue.
Recalls/TSBs owners mention: #5 received notification of NHTSA Campaign 23V181000 (Trailer Hitches), though unrelated to stalling issue. #6 assured ECM update would solve issue but did not improve condition; dealership stated car was fine when scanned but failure pattern continued.
Complete Loss of Power While Driving
Vehicle experiences total or near-total loss of electrical power while driving at highway speeds. Multiple warning lights appear. Loss of ability to signal or use emergency blinkers. Vehicle enters unsafe state despite having received recall remediation.
When: #7 within few miles of receiving recall remediation (15,000 miles); #8 while accelerating from stop sign
Symptoms owners cite: Full loss of power while driving; Multiple warning lights displaying simultaneously; Loss of ability to signal or use emergency blinkers at speed; Vehicle stalls while partially on roadway; Collision warning system activates; All warning systems activate simultaneously; Loss of power lasting several minutes before engine restart
Repairs/costs cited: Vehicle towed after incident in #8. #7 occurred immediately after recall remediation.
Recalls/TSBs owners mention: #7 received Recall Campaign 236 remediation for loss of power safety defect, but identical defect recurred within few miles of driving post-repair. #8 recall notice received after incident stating loss of power 'could increase risk of crash' with no fix available at time of notice.
Driver Seat Unintended Forward/Reclined Movement
Driver's seat moves forward and reclines into dashboard spontaneously without operator input. Occurs while vehicle is parked and turned off. Second occurrence documented with photo. Potential for serious injury from being pinned against steering wheel.
When: #9 second occurrence on 08/04/2022 when parking; #18 at 17,551 miles while parked with transmission in Park and parking brake set
Symptoms owners cite: Seat runs full forward; Seat reclines forward into dashboard; No input from operator triggering movement; Occurs while vehicle is parked and turned off; Driver pinned against steering wheel; Restricted breathing; Risk of rib injury
Repairs/costs cited: #9 planned to contact dealership for inspection and routine maintenance after second occurrence; #18 owner able to stop spontaneous movement manually.
12V Accessory Connector Overheating and Cord Melting
12V phone charger connector generates excessive heat, melting owner's phone charging cord. Dealerships reported to owner that vehicle cannot detect the problem and blamed use of third-party charging cord, despite serious fire hazard.
When: Timeframe not specified in narrative
Symptoms owners cite: 12V connector melts phone charging cord; Risk of fire from overheating connector; Unsafe electrical behavior
Recalls/TSBs owners mention: Dealerships at Centennial Hyundai Las Vegas and High Desert Hyundai Kingman stated vehicle cannot detect the problem and blamed use of substandard charging cord.
Chronic Battery Drain and Recurring Dead Battery
Battery repeatedly dies or becomes severely depleted after short intervals, requiring jump starts every few days. Battery appears functional when tested at dealership but fails in field use. Dealership testing finds no fault despite repeated dead battery events.
When: #12 repeated failures after initial battery replacement; #3 battery died and could not be revived by standard jumper cables
Symptoms owners cite: Battery dead or too low to activate systems; Repeated dead battery events within days; Insufficient battery power after short driving periods; Battery tests pass at dealership despite field failures
Repairs/costs cited: #12 owner required jump-start every couple of days; dealership battery test passed after 60-minute charge and load test despite repeated failures.
False Collision Warning and Unintended Emergency Braking
Vehicle issues collision warning and applies emergency braking when no collision threat exists. Warning displays state 'Danger, collision imminent' or similar message. Unintended hard braking occurs multiple times in same manner, creating safety hazard.
When: #13 occurred three times in same manner while driving at highway speed limit
Symptoms owners cite: Collision warning flashes on display; Warning message states 'Danger, collision imminent'; Sudden hard braking with no traffic threat present; Vehicle slows or stops unexpectedly; No vehicles close in front of vehicle during events; Recurring events with same pattern; Dangerous braking at highway speeds
Brake System Malfunction with Warning Light Cascade
Brake pedal exhibits twitching and grinding sensation. Multiple warning lights illuminate on dashboard and remain on. Issue occurs while slowing on interstate exit.
When: #19 while coming off interstate exit and slowing down
Symptoms owners cite: Brakes feel like they do not want to work; Grinding sound from brake system; Brake pedal twitches under foot; Multiple warning lights appear on dashboard; Warning lights remain on and do not clear; Three warnings appear simultaneously
Apple CarPlay Disconnection Issue
Cellular phone disconnects from Apple CarPlay system without reason. Cannot reconnect without turning off vehicle and restarting.
When: #6 started around same time as engine stalling issues (Sept 2022, roughly 1.5 years after purchase)
Symptoms owners cite: Phone disconnects from Apple CarPlay; Cannot reconnect without vehicle restart; Must turn off vehicle to clear issue
Synthesized from 23 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
This vehicle has to replace car horn 3 time unsafe to drive this vehicle have opened repair . Unable to get load . have to Walt for service day .this vehicle have only 14000 mile I am disable person.
I was accelerating after being at a stop sign onto a major two lane road when all of the warning systems came on and the car stalled while the front of the car was partially on the major two lane road. The alarms, including the collision warning were going off, and it took me several minutes to restart the engine. I was very lucky that I was not hit by oncoming traffic. This was immediately…
While driving in the fast lane on the freeway at speed limit the car suddenly began to slow/stop, after which a warning flashed on the display that said Danger, collision imminent, or something like that. There was no one close in front of me when that happened. This exact scenario has happened three times now in this car, in the same way! I felt my life was endangered every time by the sudden…
Had electrical trouble with your 2021 Hyundai Santa Fe?
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 Santa Fe?
It's a meaningful issue. 23 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Based on the 23 complaints filed, electrical issues most often appear around 37,500 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/Santa Fe.
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.