2023 Hyundai Santa Fe

While merging into the highway at approximately 49 to 52 mph, acceleration was applied to merge into the highway between moving vehicles. The vehicle responded by greatly increasing the rpm but not applying the power to the wheels. The engine revved up with very little acceleration. After 5 to 8 seconds, the power was finally transferred to the wheels and the vehicle sped up. The vehicle behind me had to apply the brakes since I basically cut them off. This was the second incident of this type.

This same scenario has happened 3 times since I purchased this vehicle - first event at mileage of 6273, 2nd event @ 7586 miles, and 3rd event @ 12,506 miles. All events were the same - while driving, dash board light start to flash and the vehicle looses all ability to accelerate. For each event, we have been able to coast out of traffic, turn the car off & restart. Once the car is restarted the acceleration works again, but the check engine light remains on along with an error code of P065312 Possible Power Train Issue. We have been very fortunate each time that we were on a road where we were able to coast out of traffic, but if this happened on a busy Interstate or Hwy traveling at high speeds we could have been rear-ended. The vehicle has been to the dealership twice for service and no problems have been found. The vehicle will be returned to the dealership tomorrow for 3rd service attempt.

This hard brake peddle pressure issue started out immediately on an occasional basis but now occurs almost every morning on first start of the day. Press on the brake pedal - it's very hard to deflect - and if you don't overpower it to deflect the pedal enough to activate the brake lights, it won't start. Once you get it started the first time, brake operation will be normal for the rest of the day. A specialty maintenance blog has covered this issue comprehensively. The Hyundai Maintenance website is apparently aware of this potential problem. According to [XXX] , it is likely caused by a malfunctioning brake booster or vacuum leak and recommends taking the vehicle to your dealer for diagnosis and repairs. This is apparently a common problem across multiple Hyundai models since there are several threads on this subject on [XXX] : [XXX] [XXX] [XXX] [XXX] [XXX] I took my vehicle to the dealer where I purchased it and left it with them for a couple of days, Said they had thoroughly tested the vacuum line and found no leaks or problems and that the vehicle was performing as designed. Don't know how serious this is, but I have concerns. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While parking, the brakes failed. Although the brake pedal was correctly and completely depressed the car failed to stop until it hit the building causing damage to structure and injuries occurred to passengers. The brake pedal pulsated but the car did not stop. Prior to this, the brakes would sporadically pulsate while braking. There were vehicle health issues that were reported.

About three weeks after we bought the SUV, a small rock hit the windshield while we were driving on the freeway, causing a quarter-sized crack. We had it repaired. A week later, two more tiny chips appeared on the windshield. We didn't even notice anything hitting the windshield, and we only drove it on city roads with normal road conditions. The windshield seems to have very soft glass and gets cracked or chipped very easily in regular driving conditions. We've never encountered windshields this weak in our 20 years of driving experience. We feel it poses a potential visibility hazard for the drivers.

The contact owns a 2023 Hyundai Santa Fe. The contact stated while driving at various speeds, the Forward Collision Avoidance system erroneously activated, causing the braking system to activate and the vehicle to veer to the left. The contact stated that the failure was intermittent. The vehicle was taken to the local dealer on several occasions due to the failure however, a cause for the failure was not determined. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 1,000.