2017 Hyundai Santa FE driver assist problems

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The contact owns a 2017 Hyundai Santa Fe. The contact stated that while driving approximately 15 MPH on the interstate, the contact heard an abnormal tumbling sound coming from underneath the vehicle. The contact noticed an unknown object had detached from the vehicle. Upon inspection, the contact determined that the detached component was the radar sensor. The Automatic Emergency Braking (AEB) system and the adaptive cruise control became inoperative. The contact stated that the vehicle had not been involved in a crash prior to the failure. The vehicle was taken to an independent mechanic for inspection. The mechanic advised that the radar sensor could not be reattached and stated the failure was possibly caused by a crash. The local dealer was contacted, but the vehicle was neither diagnosed nor repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 130,000.

NHTSA complaint #11748721 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

reporting a serious safety concern involving my 2017 Hyundai Santa Fe Sport with the Theta II engine. While driving on the highway, my vehicle suddenly lost power without warning. The vehicle became unsafe to drive and I had to pull over and have it towed. There was no warning light before the failure. The vehicle has been regularly maintained. Hyundai later stated there was internal engine damage. My vehicle also shows an open engine-related recall/campaign since November 2025. I have found many similar complaints from other Hyundai owners describing sudden loss of power, excessive oil consumption, and engine problems involving the Theta II engine. I contacted Hyundai Motor America and provided documentation and videos, but I have not received a meaningful response. I am concerned this issue may represent a serious safety defect because the sudden loss of power occurred while driving on a highway.

NHTSA complaint #11740312 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

ABS doesn't work, traction control doesn't work, while it was raining the sensor lights came on and I began to hydroplane almost causing a wreck while driving on the highway. The sensors go off and on the emergency brake won't engage while this sensor is on also. Acceleration stall pulling out in traffic. I'm scared to even drive the suv

NHTSA complaint #11682094 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

ABS doesn't work, traction control doesn't work, while it was raining the sensor lights came on and I began to hydroplane almost causing a wreck while driving on the highway. The sensors go off and on the emergency brake won't engage while this sensor is on also. Acceleration stall pulling out in traffic. I'm scared to even drive the suv

NHTSA complaint #11682094 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING

Rear camera stoped working

NHTSA complaint #11679702 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The turbocharger failed on my 2017 Hyundai Santa Fe Sport 2.0T. It is still on the vehicle and available for inspection upon request. The turbo failure caused a severe loss of engine power, making acceleration dangerously slow and unpredictable, especially when merging onto highways or passing vehicles. This sudden reduction in power could have caused a rear-end collision or made it impossible to avoid faster-moving traffic. Yes. The failure was confirmed by two independent service centers: Mavis Tires and Brakes, and Tires and Trust in Pensacola, FL. Both observed loss of turbo boost and excessive oil consumption consistent with turbocharger failure. Yes. The vehicle was also inspected by Allen Turner Hyundai in Pensacola, FL. They did not detect the failure during their inspection, but the issue persisted and was documented by the other two shops. The check engine light came on around 118,000–119,000 miles. After that, the turbocharger lost significant power, making the vehicle unable to accelerate normally. At the same time, the engine began consuming oil at an abnormally high rate, requiring frequent top-offs between oil changes. This suggests internal oil seal failure in the turbo or related component issues. These symptoms are consistent with failed turbocharger bearings or seals, oil starvation, or blocked oil lines causing overheating and damage. Such failures can release oil and metal debris into the intake and exhaust systems, risking further engine damage or even fire. Hyundai previously issued a software update (KSDS) to detect early bearing wear in these engines, which my vehicle received in 2019 (Service Campaign 953). Despite this, the turbo failure still occurred, suggesting the underlying design or manufacturing issue may not have been fully resolved. I am requesting that NHTSA investigate this pattern of failures, given the safety risks of sudden power loss and potential fire hazard from oil leaks.

NHTSA complaint #11673630 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

On April 28, 2025 my car cut off in the middle of traffic. I turned the car completely off. I was able to turn it back on and move it out of traffic. I called my mechanic and he looked at it, He checked the oil and there was oil I'm it. He drove it around a parking lot and heard a rattling noise, He tried to get it to his shop, the rattling got louder and louder, He was scared the engine would lock up, We parked it and had to have it towed to my residence. In the last 6-8 months I had to put oil in my car EVERY week. I have taken to mi mechanic several times checking for leaks. I have been to the dealer checking to see if they there has been any recalls. Due to this situation I have NO transportation. I am already financially struggling and now I have to figure out what to do I have already paid out of pocket for the ABS to be replaced as well. My sun roof I cannot open due to the rollers r stop working. This has worst experience I have has with a brand new car, I previously owned a Hyundai and had a wonderful experience.

NHTSA complaint #11658169 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The brakes and rotors need to be replaced every 3-6 months. They have been fixed at least 4 times under warranty. Every time I take the car in I get asked if I drove through the mountains because they are fried. This vehicle has never been in the mountains because I fear what will happen if it really were driven through the mountains. However, no excessive braking occurs to cause them to be ruined every 3-6 months. I am at the point I’m curious if automatic braking is causing it to heat up and burn them. The incident below is the last time I had them replaced. I’m currently looking to sell the vehicle because of the number of times I’ve had to go in and get them replaced.

NHTSA complaint #11632995 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

The brakes and rotors need to be replaced every 3-6 months. They have been fixed at least 4 times under warranty. Every time I take the car in I get asked if I drove through the mountains because they are fried. This vehicle has never been in the mountains because I fear what will happen if it really were driven through the mountains. However, no excessive braking occurs to cause them to be ruined every 3-6 months. I am at the point I’m curious if automatic braking is causing it to heat up and burn them. The incident below is the last time I had them replaced. I’m currently looking to sell the vehicle because of the number of times I’ve had to go in and get them replaced.

NHTSA complaint #11632995 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

We noticed that we had our airbag light was on in our dashboard along with that we also notice that the buttons and horn did not work in to the steering wheel. When we took the car to get checked by the Hyundai dealership in Lakewood. We were told that the clock spring was the cause of this problem to the airbag, horn, and the buttons not working. They told us that this clock spring part it was broken and it needed to be replaced. Our concern is the number one safety which making sure that all of the airbag and horn to be working. When this was communicated to the dealership person he response was that he could not say anything much about other then him saying that it was not under warranty and it was due to the mile of the car. Which I the moment we told them we totally understand about warranty and miles to the car but the safety of someone should not be put at risk just because of one part that connects all of this things. To us this is safety concern due to the airbag and horn not working. We are not sure by us reporting this would be something can be considered for a recall or be done about without costing any money to those who own a vehicle like this.

NHTSA complaint #11566690 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

Engine failed within 3 years of having the car so did transmission. Always having other issues with this vehicle. Recently the alternator now the blind spot warning system. This vehicle was purchased new and has had so many problems.

NHTSA complaint #11455205 — an unverified report by a vehicle owner.