Hyundai Santa Fe won't start problems

Filed Nov 1, 2026 · Engine, Fuel system · NJ

For approximately the past year, my 2021 Hyundai Santa Fe, currently with about 23,000 miles, has experienced intermittent engine and fuel-system problems. During start-up, the vehicle sometimes makes an abnormal rattling/cranking noise, followed by noticeable engine and vehicle vibration. Warning lights may appear, and on some occasions the engine does not start successfully on the first attempt. When it does start, it may initially run rough. The vehicle has also stalled intermittently and has had repeated incidents where pressing the accelerator produced little to no engine response or acceleration. This creates a serious safety concern because the vehicle may unexpectedly stall, lose power, or fail to accelerate when needed while driving. The vehicle has been at an authorized Hyundai dealership for more than one month. The dealership has been working with Hyundai Tech Line and has replaced or evaluated the low-pressure fuel pump, high-pressure fuel injector, high-pressure fuel pump, MPI/port fuel injector, and valve cover. The latest recommendation is to drain, clean, and refill the fuel tank. Despite these repair attempts, the root cause has not been clearly identified or permanently resolved. I am concerned that the repair process has become trial and error, with additional components being replaced while the underlying safety-related issue remains unresolved. I am also being asked to pay out-of-pocket for some of these unsuccessful repair attempts. The vehicle is currently at the Hyundai dealership and is available for inspection if needed.

Filed Oct 30, 2026 · Acceleration, Driver assistance · CA

On three occasions while Highway Driving Assist / Smart Cruise Control was engaged, my 2025 Hyundai Santa Fe Hybrid did not slow down for the vehicle ahead and continued at its set speed. I had to brake manually to avoid a collision. Dates and conditions: UNKNOWN exact dates. All three occurred within the past several weeks. Warning lamps or messages: UNKNOWN. I did not notice a warning before the system failed to slow down. Inspection: The vehicle has not yet been inspected for this problem. I have reported it to Westlake Hyundai in Thousand Oaks, CA, and it has a service appointment scheduled. It has not been inspected by the manufacturer, police, or insurance. The vehicle also has other ongoing issues, including the brake pedal sticking at startup, two no-start events requiring roadside assistance, and intermittent electrical problems. I am concerned this is a safety defect that could cause a rear-end collision.

Filed Oct 28, 2026 · Electrical · TX

with not warming the vehicle would not start using the standard FOB. It would not be recognized. Fortunately, we had an alternative Digital Card (which is NOT standard equipment) that allowed us to start and drive the vehicle. Upon calling Hyundai support we were instructed to take the vehicle to the nearest Hyundai dealership for diagnosis. The diagnosis was a failed BDC (Body Domain Controller). This part took a week to arrive at the dealership and subsequent repairs were made. The dealership indicated that they had seen this problem before, but no service advisories from Hyundai were available for this issue. I have asked Hyundai for an explanation and nothing has been forthcoming. My primary issue with this problem is that if I had not acquired a digital card, at an additional cost of approximately $200, we would have been stranded, with no manner in which to start or drive the vehicle. There were no indications of a problem, no alerts in car, and no alerts via the My Hyundai web site via the internal diagnostics. The BDC just failed, with no explanation. Without any type of explanation or diagnostic information, who knows if or when this could occur again, and where.

Filed Oct 16, 2026 · Engine · SD

While driving home at approximately 60 mph in our 2015 Hyundai Santa Fe, the engine suddenly shut off without warning. We were able to carefully maneuver the vehicle to the side of the road, but the vehicle would not turn over or restart. We were traveling with our young children at the time, and this sudden engine failure created an extremely dangerous situation that could have resulted in a serious accident. The engine failure occurred while the vehicle was in motion, leaving us in a potentially life-threatening situation on a busy roadway. We had the vehicle towed to a Hyundai dealership for diagnosis and assistance. We waited over a month without receiving an update. When we went to the dealership in person, we learned that they had been contacting the previous owner rather than us. After providing our correct contact information even though they were given this information upon vehicle arrival, we were told that the dealership would work on getting the issue resolved and would contact us with an update. We were subsequently informed that Hyundai would not replace the engine, allegedly due to severe negligence and a lack of maintenance service receipts. We perform our own oil changes regularly and have maintained the vehicle to the best of our ability. We believe it is unfair to classify this as negligence solely because we do not have receipts from a professional service center for work we performed ourselves. When we told them that we would have an oil analysis performed to prove that it was not negligence on our part, they accused us of possibly changing the oil before it was towed. This is an insane and unprofessional accusation. We understand that engine failures involving this vehicle may be covered by Hyundai engine-related recalls, warranty extensions, or class action settlement provisions. We are requesting a thorough and fair review of our case to determine whether the engine failure qualifies for coverage. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA

Filed Aug 25, 2026 · Acceleration, Electrical · DE

2024 Hyundai Santa Fe gasoline model. My VIN was included in Hyundai Safety Recall 263 / the federal safety agency Recall 24V‑529 involving the Transmission Control Unit and potential damage to the dual-clutch transmission. On September 25, 2024, at fewer than 5,000 miles, the transmission failed and the vehicle was taken to a Hyundai dealership. The transmission repair/replacement was approved and the vehicle remained out of service until October 21, 2024. On June 5, 2026, the vehicle would not start and required towing to an authorized Hyundai dealership. The vehicle has remained at the dealership continuously since June 5 and has not been returned to me. The dealer has undertaken multiple unsuccessful repair/diagnostic efforts during the current visit. I am currently being told that the condition involves the engine/powertrain. Hyundai is now sending an engineer to the dealership because the condition remains unresolved. I am reporting this history because this vehicle experienced a transmission failure shortly after being subject to a federal transmission-related safety recall and has now developed another major engine/powertrain condition while still relatively new.

Filed Jun 29, 2026 · Electrical · MD

On [XXX] after spending the day at Henson Creek Golf Course in Fort Washington, MD, I returned to my vehicle and discovered that it had completely lost all electrical power and would not start. The vehicle exhibited no warning signs prior to the failure. Believing the issue to be related to the battery, I contacted AAA for roadside assistance. AAA attempted to jump-start the vehicle, but the jump-start was unsuccessful. The vehicle was subsequently towed on May 18, 2026, to Pohanka Hyundai in Capitol Heights, MD for diagnosis and repair. After approximately nine days, the dealership advised that the battery terminals had been secured and that no additional problem could be identified. On [XXX], the exact same issue occurred again; however, this incident was significantly more dangerous because it occurred while the vehicle was being driven. While traveling during morning rush hour through a busy intersection in Northeast Washington, DC, the vehicle suddenly and completely lost power without warning while in traffic. The vehicle stalled in the middle of the intersection, creating an extremely hazardous situation. Fortunately, motorists traveling behind me were able to stop in time, and no collision occurred. However, this incident could easily have resulted in a serious crash involving injuries or fatalities. The vehicle was towed to Ourisman Hyundai in Bowie, MD, where it is currently undergoing additional diagnosis. I am extremely concerned that this vehicle has experienced two complete electrical failures within approximately one month, including one incident that occurred while driving in heavy traffic. Because the dealership was unable to identify the root cause after the first incident, I am concerned that a serious defect may exist involving the vehicle's electrical system, battery system, wiring, power distribution system, or another component affecting vehicle operation and safety. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 23, 2026 · Engine · ME

My engine just died wont start has 121099 and hyundai wont fix it

Filed Apr 20, 2026 · Engine · MI

The vehicle (2020 Hyundai Santa Fe, 2.0T, ~88,500 miles) experienced a sudden engine failure with no warning signs—no oil light, knocking, or overheating. After sitting overnight, the vehicle would not start and was later diagnosed by an independent repair facility as having a seized engine requiring replacement. The failure was unexpected and creates a potential safety risk, as it could have resulted in a loss of power while driving. The manufacturer has been notified but denied warranty assistance due to lack of maintenance documentation. The vehicle is currently available for inspection.

Filed Apr 11, 2026 · Engine · NY

My wife was driving the vehicle by the left lane on route 9A northbound on elmsford at a speed around 35 mph. The vehicle suddenly came to stop completely while driving. My wife tried to start it but it didn't start. We called the police to come help us due to the ongoing traffic while the towing was on its way. Our mechanic told us the engine was seized and needs a replacement. The vehicle is a 2018 and has only 118000 miles. We do oil changes periodically every 3000 miles.

Filed Mar 19, 2026 · Engine · OH

Beginning about a month ago, I noticed a rattle upon the engine start up that lasted for a 1-2 seconds then stopped and everything sounded normal. I thought it could be b/c of the cold weather. I went in to get a routine oil change on 03/11/2026 and they said the oil looked fine, but it was about a quart low, indicating it was burning some oil somehere. They said to check in in a few months and they would top it up if needed. I asked them about the rattle and they thought is might be from a bad (timing chain tensioner) but said I should get it checked out. I called on Friday 03/13/26 to schedule an appt at my local Hyundai Dealership on 03/17 . The night before(03/16), I was driving my vehicle and suddenly on the road, I heard a loud noise in the engine, and the power shut off, the Engine and oil light came on and I just had enough time to pull off the busy state route. My car would not start or turn over. I had it towed to the dealership and they did determine that it was a "Rod Bearing Failure" that caused the engine to sieze. I provided them evidence of my oil changes which from 10k-93k miles on my car since I have owned it. I have had the oil changed 10 times. They are saying they only allow 8k between oil changes to honor the warranty and have initially denied my claim. The service associate at the dealership said my valvetrain was 'somewhat' dirty, but nothing to where it was the cause for this issue. And since it was the Rod bearing that failed, the exact part that was recalled, he was surprised they were not even offering any good-will offer, to split the cost of the engine replacement. I have reached out to Hyundai Consumer Affairs and am waiting to hear back to see if they will be fair and work with me on this to honor the warranty issue or at least share the cost burden for this "well-known" failure in their engine.