Hyundai Santa Fe sudden acceleration problems

Filed Oct 5, 2026 · Brakes, Engine · KS · crash

I do not know what caused this. Here is what happened. While parking the car suddenly accelerated, over the curb, on the sidewalk narrowly missing the building because I turned hard right to avoid the building and I was able to brake to a stop glancing off a concrete pillar. We could have been hurt crashing into the wall/windows, anyone on the walk would have been hurt & anyone in the store could have been hurt. The car was towed to Hatchette Hyundai-East waiting to be looked at. There is no police report because it was private property and no damages except to my car. No warning lamps or messages. I remember 2 previous incidents that happened recently. While driving in normal city traffic, my passenger asked if I had speeded up? It was morning traffic, so I didn’t really think about it. Later that day while returning home there was a weird thing that happened. Again, in traffic, the car engine did something weird, but I thought it was the car reacting to the car beside me being too close. It was like it downshifted, slowed down and then resumed normally. The only other time I had any problem was on May 9th near Lawrence, Ks. The car began vibrating and felt like it was going on rumble strips when I accelerated and did not get up to speed. If I let off the gas it quit. I had the car taken to McCarthy Hyundai-Lawrence, Ks. They diagnosed an issue from the computer codes and completed repairs having the car from Monday until Wednesday.

Filed Aug 12, 2026 · Transmission · 74,558 miles · NY

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the vehicle lunged forward. In addition, the vehicle almost stalled. No warning lights were illuminated. The vehicle was taken to the dealer; however, the failure was not duplicated. The contact was informed that no fault codes were displayed. The contact was informed that the issues with the vehicle were just a case of bad luck. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that the failure had occurred shortly after the vehicle was repaired under Technical Service Bulletin: 9C2, in May 2026. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 74,558.

Filed Jun 15, 2026 · Engine · IL

vehicle serviced on 5/7/2026 for Hyundai service campaign 9C2 immediately after noticed car was not driving as it had been prior to this update, sluggish acceleration on start, chugging and then rapid sudden acceleration. returned to service dept May19. Diagnostics revealed no issues, problem persisted. returned to service dept. May22. Informed Hyundai was looking into this issue related to the 9C2 update and awaiting a new update to fix the problem. As of todayJune15 there has been no action to remedy the problem. Do not feel safe driving a vehicle that hesitates when starting to drive and then accelerates roughly. this has happened consistently upon cold start up thus far but concerned it may happen while in traffic or at other times and result in an accident.

Filed Jun 11, 2026 · Driver assistance, Engine · OK · crash

We were at full stop with Auto Hold feature enabled. Car lurched / jumped forward with no depression of the gas pedal. This caused us to strike the car in front of us.

Filed May 25, 2026 · Seat belts, Transmission · CA

We have had several transmission issues with this vehicle for over a year. On March 5th we dropped the car off for an oil leak, a malfunctioning middle row seat belt, and an on going transmission clunk and roll. The dealer repaired the oil leak, replaced the seat belt, (damaged the interior of the vehicle while doing so, then denied it) and said they were unable to replicate the transmission problem. The car went back to the dealer again on March 26 for the transmission clunk and roll. They kept it for 8 weeks, and said they couldn’t replicate the issue. I have confirmation that they didn’t even start the vehicle for 4 weeks. We picked up the Vehicle on May 22, and the issue persists. Yesterday, when pulling out of a gas station, the vehicle accelerated on its own until I intervened stepping on the brake pedal. When I typed in the issue to Google, I was made aware that the vehicle now has a front seat belt safety recall from April 6, which the dealer didn’t even advise us on or offer to repair. I am finding out about this on an interstate family drive and we are of course terrified of driving our vehicle now, based on the unintended accessories and now faulty front seat seat belts. I have asked Hyundai serval times for a buy back which they have refused. Corporate has asked us to bring the car back to the dealer this week, and we are about to sign papers with a lemon law lawyer tomorrow. I wanted to at least file this complaint so that it is in writing should something happen to us in our travels this week. This has all been so unacceptable with Hyundai. We bought this car new and it is paid off.

Filed May 19, 2026 · Acceleration, Engine · KY

After the installation of the Service Campaign 9C2 engine update, the car now seems to surge or rev up briefly at lower speeds like it can't find the right gear or is trying to briefly accelerate. It doesn't seem to be as noticeable at highway speeds, but in residential or low speeds, it's very noticeable and a little unsettling as the car feels like it wants to briefly lunge forward. No lights are on the dash and there is no indication of any malfunction, but it did not behave this way prior to the 9C2 engine program update. I waited for a couple weeks before contacting Hyundai Corporate about this issue because I was hoping maybe the transmission or engine was relearning after a battery disconnection, but it has not gone away.

Filed Jan 22, 2026 · Engine, Fuel system · CA

Car had an unintended acceleration. I had been stopped prior to entering my garage. I had started to slowly accelerate when the car accelerated hard. It took a lot of effort to stop the car.

Filed Jun 11, 2025 · Body, Lights · CA · crash

My wife was parking the car at carport, all of sudden unintended acceleration happened and hit through the wall. The damage on the car was $12478.57 and damaged the wall and storage on both sides of carport. My wife is scared to drive this car.

Filed Apr 18, 2024 · Acceleration, Brakes · CA · crash

1) What component or system failed or malfunctioned, and is it available for inspection upon request? I tried to park in the parking space next to it by making a slight right turn. As soon as I stepped on the brake to park, the car began to rush forward. I noticed again and again that my foot was slamming on the brakes, but the car didn't stop. My car went over the ledge between the parking lot and the store, slammed into the pillar of the building on the left, smashed all the glass in the dance studio, and hit the wall on the right before coming to a stop. It took six seconds from rushing forward to into the store. 2) How was your safety or the safety of others put at risk? I must have been severe injured if the car didn't stop by hitting a right-side wall of the store. And if there were people, I was not able to avoid casualites. 3) Has the problem been reproduced or confirmed by a dealer or independent service center? No, the car was towed and reviewd by car insurance. Car insurance informed that th e car will be total loss. No information about reproducing the issue 4) Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No 5) Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No, that was suddenly occured 6) Request: I want the federal safety agency to investigate my car of sudden unintended acceleration. I would like to get EDR, X-ray of PCB board of electrical central unit(a.k.a ECU) managing brake and accelerator and car manufacturer's reliability sign-off report of the ECU board. I have a security footage taking the accident moment. I failed to upload the video. If you want, please let me know. Will send the video file with the federal safety agency.

Filed Mar 14, 2024 · Acceleration, Engine · OH

Reference Number: 11520065 This is a follow up to a previously submitted incident involving this same vehicle. My first submission was May, 2023, This vehicle experienced the exact same hazardous condition on February 26, 2024. on I-75 south. After driving on an interstate highway for about 1 hour, I noticed a traffic backup and proceeded to slow down as the traffic was nearly stopped. As I slowed my car down to nearly a complete stop, the engine suddenly surged forward with high rpm's as though the accelerator was pushed to the floor. I immediately pressed on the brake pedal as hard as I could to stop the car from surging forward and then quickly decided to put the transmission into neutral so I would not hit the car in front of me. The car eventually stopped surging and may have stalled. I finally got the car to move again by turning off the ignition and restarting it. I continued on my way and did not have a similar situation for the rest of my 30 minute highway trip. Like all the times before, the floor mat was NOT involved in this sudden acceleration. Last year when I took this car to a Hyundai dealer for inspection, they could not replicate this condition. They said that I needed a new fuel level sensor in my gas tank and a new fuel pump--neither of which I agreed to because first, the gas gauge has no relation to my surging and second, the fuel pump must be working or else I could not drive the car. This surging has occurred perhaps 7 times since I have owned this car since 2008. It is frightening to know that it could happen again with personal injuries or property damage. This condition rarely happens in city driving, but has happened at least 3 times in city driving. Seems like this situation would warrant a manufacturer recall.