2023 Hyundai Santa Fe Electrical System Problems

During on driving, engine stopped 3 or 4times since Jan/2025 Last time engine stopped yesterday around 6:30pm on 3/30/2026 at [XXX] between [XXX] and [XXX] in Los Angeles INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Needed to use horn in an emergency situation and that's when I found out my horn no longer works. 20,000 miles on 2023 Hyundai Santa Fe.

What component or system failed or malfunctioned, and is it available for inspection upon request? Horn How was your safety or the safety of others put at risk? My horn stopped working - cannot use it when driving to warn other drivers - safety issue Has the problem been reproduced or confirmed by a dealer or independent service center? Not reproduced, but dealership has confirmed the horn stopped working on three separate occasions. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Dealership - three times Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No. Hyundai dealership said my fuse blown on three separate occasions causing the horn to stop working. My horn stopped working a few months ago, then about a month ago and again last week - all due to blown fuses to which the dealership has no explanation.

Horn stopped working at 47,474 miles Check Tire Pressure System light is on, poor sensor at 45,650

Horn completely out, yes available. I was unable to warn another driver from entering my lane several times. Warn a pedestrian from stepping out into traffic. Confirmed by the dealer. The horn was Inspected replaced at my own cost on March 2025 by December 2025 the part is no longer operational. I asked the dealer to honor the warranty they declined saying the mileage was passed the warranty terms.

Both horns on my 2023 Hyundai Santa FE have failed 3 times. The first set was covered under warranty (3/24), the second set cost $499.64 (3/25). Now both horns are nonfunctional after just being replaced this Spring. After reviewing many complaints on the Hyundai community form, it is very obvious there is a major issue with their horns ( and not just the Santa Fe model). Twice this week I was in need of my horn to alert other drivers but instead had to make quick maneuvers to avoid an incident. My vehicle currently cannot pass a state inspection.

While driving after dark, a different car traveling in opposite direction almost caused head on collision while driving in the wrong lane. Driver of the Santa Fe attempted to activate horn on vehicle to alert other vehicle that they were traveling in the wrong lane/direction, but horn failed to sound. Driver was narrowly able to avoid physical collision as a result. Driver took vehicle to dealership and it was determined both high and low horns had failed again (total horn system failure), and the dealership replaced under warranty. This is the second time in less than 2 years of ownership the horns have failed and needed to be replaced. Dealership stated horn failure is common in the 2023 Santa Fe, but is only covered under the 5 year/60000 mile warranty despite being a known defective part. Hyundai should offer a voluntary recall to repair affected vehicles with redesigned parts as the horns failing is a known issue and failure can result in severe safety risk while driving.

On a clear road a sencor comes on detect comes on says detection collision. The breaks come on when you are traveling on interstate or two lane roads. When you are traveling 75 mph and breaks come on all of a sudden on the highway. We are lucky we never got hit in the back of the car going that fast. We will stop 75 to 35 mph in 10 seconds.

At stop sign and car with auto start stop on and at the time of releasing the brake, car was not able to start engine. Car had to be shifted to parking position to start engine.

Horn has failed 4 times

Component/System: Automatic Emergency Braking / Forward Collision-Avoidance (AEB/FCA) system and/or Electronic Parking Brake (EPB). The vehicle is available for inspection upon request. What happened: While driving my 2023 Hyundai Santa Fe (VIN: XXX) at highway speeds, the vehicle suddenly and aggressively applied the emergency braking system on two separate occasions within the same day (approximately 45–60 minutes apart). In both instances, the red emergency braking warning lights illuminated on the dashboard, and a warning sound activated. There were no vehicles, obstacles, or hazards in front of me either time. The braking was forceful and abrupt, causing rapid deceleration at highway speed. Both events occurred under normal, clear driving conditions. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) Safety risk: My safety and the safety of other drivers were put at significant risk. Sudden unintended braking at highway speeds can easily lead to a rear-end collision since the deceleration was not caused by driver input and gave no warning. Reproduction / dealer confirmation: The dealer has not been able to reproduce the issue, and no diagnostic trouble codes have been found so far. The vehicle is currently at the dealership for inspection. Inspection: The vehicle has been inspected by the Hyundai dealership, but the cause has not been identified. No manufacturer field engineer, police, or insurance inspection has taken place yet. Warning lamps / prior symptoms: During the failures, the red emergency braking indicator and audible warning activated immediately when the brakes engaged. There were no warning lights or symptoms prior to either event. Assessment: Cause UNKNOWN. The problem appears to be an intermittent malfunction of the Automatic Emergency Braking system, forward collision sensors, or related braking components. No diagnostic codes were stored. This is a serious safety issue that occurred twice within one hour and could easily result in a collision.

The horn stops working which is a safety hazard in case someone is backing into you, etc. This horn has stop working 4 times and had to be replaced.

Horn No longer works in vehicle - A major safety issue

On [XXX] in Rehoboth, DE, my 2023 Hyundai Santa Fe experienced a sudden and complete power failure while reversing out of a parking spot. All electrical systems shut down—including propulsion, dashboard lights, and emergency brake—causing the vehicle to roll backward into oncoming traffic. No warning lights appeared beforehand. After about an hour, power returned on its own. A passing police officer witnessed the situation and a report was filed with the Rehoboth Beach Police Department. On September 6th, Hyundai service performed a diagnostic scan of the engine and transmission systems. No fault codes were found, and the issue could not be replicated. After sitting overnight, the vehicle restarted normally and passed a road test. The dealership documented the incident but returned the vehicle without repair, stating: “Cannot duplicate concern at this time.” I was advised to tow the vehicle in if the issue recurs and, if rolling occurs again, to use a wheel chock. I purchased this vehicle new in 2023. It has only 40,000 miles and is covered under a 10-year bumper-to-bumper warranty. A failure of this magnitude—especially during a basic maneuver like reversing—poses a serious safety risk. Despite the dealership’s inability to replicate the issue, I do not feel safe operating the vehicle until the root cause is identified and resolved. I am currently in the process of escalating to Hyundai corporate for further investigation, including a buyback review, replacement evaluation, or extended diagnostic protocol. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

horn has stopped working. Seems to be a systemic issue when looking online in Forums etc... I have scheduled the problem to be fixed and it is not a fuse issue. It will be a month before the dealership is able to get me in to assess the problem. This is a safety related issue and this needs to be addressed with the manufacturer.

horn has stopped working twice. Had it replaced under warranty in January of 2024. Same incident happened where horn of vehicle does not work. Seems to be a systemic issue. This is a safety related issue and this needs to be addressed with the manufacturer.

On [XXX], a 2023 Hyundai Santa Fe SEL (VIN: [XXX] ) spontaneously caught fire ~8 hours after parking, per fire report (Walla Walla Fire Dept.). The fire destroyed the hyundai santa fe sel engine compartment and totaled 5 vehicles with a total value of over $400,000 not including personal property to the parties involved. I was not the Hyundai’s renter/operator; the vehicle was rented by a third party from Enterprise. Despite no active recall for this VIN, the vehicle contained: Mando ABS module, Mando EPS module similar to known defective parts of the same year, and Hyundai Mobis tow hitch harness, all of which have known defect/recall history in similar make/Model equivalent vehicles. This case may involve VIN exclusion errors or latent product defects similar to recent defects INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The car loses power. The battery and key ignition light keep coming on. A message displays auto engine off. Please shift to n or p and start engine manually. After communicating and showing video proof of the incident, the dealership replaced the alternator and battery. The issues started around 5000 miles. The infotainment system lags and the car lags. Sometimes I am left on the road because the case refuses to cut on or off.

Every time it rains, one of the dual tone horns will fail. I have had the horn replaced 2 times. I am beginning to have a problem with the horn again after this last rain. It is a matter of time before it fails completely after a rain and becomes unusable. I feel this is a significant warning feature that MUST be reliable.

The contact owns a 2023 Hyundai Santa Fe. The contact stated while driving at approximately 55 MPH, the horn was inoperative. No warning light was illuminated. The vehicle was taken to a dealer where it was diagnosed and determined that the horn needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 7,600.