2017 Hyundai Santa Fe Sport: adaptive cruise control problems

Filed Feb 14, 2025 · Electrical, Visibility · 53,000 miles · FL

The contact owns a 2017 Hyundai Santa Fe Sport. The contact stated that while her husband was driving approximately 65 MPH, he heard an abnormal banging sound coming from the vehicle. The contact stated that the sunroof glass had shattered. The contact stated that the sunroof was not impacted by an object to have shattered. The contact stated that her husband had not noticed any warning lights being illuminated. Additionally, the contact stated there were multiple electrical failures with the vehicle. The contact stated that the cruise control was not functioning, and the tailgate was opening independently. The contact stated that the electrical failures were constant. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that there were no electrical failures found, and a new sunroof glass was ordered. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 53,000.

Filed Apr 1, 2023 · Acceleration, Driver assistance · NV

I was driving on the highway in a mountainous area going downhill. The cruise control was on with the speed set at about 80 miles/hour. Then the car was losing speed, the RPM needle started swinging from left and right. I stepped on the accelerator but the car continue losing speed to 40 miles/hour and continue losing speed. I turned on the emergency light to warn the other drivers and was able to move the car to the shoulder and stopped it without an accident. But the cars behind me could have smashed into my car that day and that would be the last day for my mother (in the car at that time) and me. The car had 41000 miles on it and we had the maintenance done just recently. I did not notice anything else abnormal before the incident. We reported the problem to the dealer and have to pay for the dealer to inspect the car. The inspection has been scheduled but not done yet.

Filed Apr 14, 2019 · Brakes, Electrical · 26,000 miles · MI

The warning light saying that the emergency braking system is temporarily disabled keeps coming on and off multiple times a day and it disables the adaptive cruise control when I an driving in cruise control. It happens while vehicle is in motion in all kinds of circumstances and weather and have taken car to dealer 3 times without any solution. Have tried cleaning sensors multiple times. Dealer has seen it happening twice in a 10-15 minute test drive documenting it. Hyundai consumer assurance has not resolved the problem either. It has been happening since december 2018. It was not happening at all for the first 14-15 months of ownership. It happens at various speeds.

Filed Aug 28, 2017 · Acceleration, Engine · 2,900 miles · SC

Excessive engine braking on downhill roll with cruise engaged, will downshift then downshift again. While reducing the speed the cruise will cause the transmission to up-shift still rolling down the same hill at this point the cruise realizes the speed increase and does a double downshift from where it was. At this point the RPM has jumped to just under 5000 with the engine whining like its in pain. I live in and travel, to and from work in the lower savannah river area of south carolina. The hill that I was on is about the length football field and the speed limit is 55mph unsure of the grade, but as I explained where we live. The first time I noticed this issue the odometer had just over a thousand miles and just thought it was an anomaly but now it has just under three thousand miles and it still has the problem. The car was purchased as a wedding gift for my wife and she's scared to drive it because of the cruise control issues. She would rather drive her 2007 santa fe the cruise control in it acts normal and feels dependable, even with 114,000 miles on it. I've contacted hyundai motors and have taken it to the dealer with no results. Hyundai assigned me case worker angela godbey (714) 965-7049 she closed the case 8/23/17, but not without giving indication that the problem is a manufacturers installed defect.

Filed Aug 10, 2017 · Acceleration, Engine · NC

I purchased a new 2017 santa fe sport on 5-26-17. On 7-19-17 at around 7100 miles I received a message warning me of the engine overheating. I put a phone call in the following morning to my dealership and was told to bring it into the shop 7-20-17 (thur). That afternoon I received a call from my service adviser stating there was no check engine light on and they could not find an issue. I then restated it was not an engine light but an actual message stating the engine was overheatng. He then called me back 10 minutes later stating there in fact was a leak in the water pump and they needed to replace the gasket and that they would not have the part until 7-25-17 (tues). When I finally got my car back on the 26th (wed) all seemed fine again. On friday 7-28-17 while driving on cruise control at 60 miles per hour I felt the car down shift and RPM's started going well over 5000 and the only way to stop it was to push on the break this happened twice withen an hour span. I contacted dealer again and was told to bring car back. Note they also had to fix a scratch put on my passenger mirror from when car was serviced the first time. I brought my santa fe back in on monday 7-31-17 and finally decided to contact service department on wed 8-2-17 when no body called to let me know of issues. Since then todays date is 8-10-17 I contacted dealer again to find out status as of right now they had to replace head gasket , reprogram cruise control and replace thermostat on top of the gasket they already replaced on water pump. The service department also stated they still smell coolant in my SUV which concerns me still since I am 5 months pregnant. I did start case with hyundai USA and am waiting to here what options I may have but know I do not want this SUV back for my safety.