2017 Hyundai Santa Fe electrical problems

Filed Oct 22, 2026 · Electrical · 109,000 miles · NJ

Odometer Fraud. The contact purchased a 2017 Hyundai Santa Fe. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of the purchase, the mileage was 45,000. However, when the vehicle was taken to a dealer for a trade-in, it was discovered via a Carfax report that the mileage was over 109,000.

Filed Oct 15, 2026 · Electrical, Engine · CA

On [XXX], Laguna Niguel Hyundai performed Service Campaign 9C2 (ECU software update for Theta II emissions improvement, Hyundai TSB 26-01-013H) on my 2017 Hyundai Santa Fe Sport. Immediately after the update, the vehicle developed drivability problems that did not exist before: rough/harsh shifting, hesitation, and loss of power during cold-start operation (the first 1-3 minutes after engine start), plus intermittent infotainment and navigation system failures. Hyundai's own dealer notice dated 05/18/2026 acknowledges vehicles may exhibit 'hesitation or rough shifting' after the 9C2 update and states the matter is 'currently under review' — no permanent fix has been released. The dealership that performed the recall has since refused to service my vehicle again. I opened case #[XXX] with Hyundai corporate; my inquiries on 09/03/2026, 09/11/2026, and 09/17/2026 asking for a corrective action have gone unanswered. The hesitation and power loss are a safety hazard when merging into traffic or crossing intersections. I request the federal safety agency investigate this pattern. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 29, 2026 · Electrical, Engine · SC

Was driving down road car went into limp mode about caused a big wreck, check engine was flashing and heard a loud noise as I was trying to get to safety. Had the car scanned and was for code p1326 and looking at all the recalls nothing is for the 2.4l but y'all have been having a lot of issues with these theta 2 engines.

Filed Aug 31, 2026 · Electrical, Engine · NC

Cold-Start Hesitation & Rough Shifting: Following the 9C2 ECU update, my vehicle is experiencing a brief period of throttle hesitation, rough shifting, or jerky transmission behavior specifically during cold-start operations.

Filed Aug 24, 2026 · Electrical, Engine · NJ

My 2017 Hyundai Santa Fe, purchased new from Lynnes Hyundai in February 2017, has approximately 93,000 miles. The vehicle previously developed a significant oil-consumption/engine problem that was diagnosed by Hyundai, and Hyundai replaced the engine with a remanufactured engine. Approximately two weeks after the engine replacement, the check-engine light illuminated and DTC P1326 was identified. The dealership replaced the knock sensor. Approximately two weeks later, the check-engine light illuminated again with a recurring P1326 condition. The vehicle is currently at Lynnes Hyundai and has been there approximately three weeks while they attempt to determine the cause. Hyundai Techline is involved. Prior to the current repair visit, while traveling approximately 60 mph, the vehicle experienced a very forceful hesitation that jerked the vehicle. I immediately slowed down and pulled onto the shoulder. The vehicle continued to hesitate intermittently while I drove slowly to safety. I was concerned that the vehicle could lose power or shut down while I was driving at highway speed, creating a risk of a crash. The recurring P1326 condition has been confirmed by the Hyundai dealership. The vehicle and engine have been inspected by Hyundai/Lynnes Hyundai multiple times, including after the engine replacement. The current recurring condition has not been resolved. The check-engine light is the warning lamp associated with the current condition. I do not know the underlying cause of the recurring P1326 condition; Hyundai is currently attempting to diagnose it. The vehicle is currently available for inspection at Lynnes Hyundai.

Filed Jul 3, 2026 · Airbags, Electrical · CA

Airbag light on. La Quinta Hyundai verified light on scanned codes found active b134800 Driver airbag resistance circuit short to ground 1st stage. Testing found clock spring issue internal fault. Since this clock spring is related to driver airbag, & horn, it would seem that this would be a safety hazard that would be under warranty. The extended warranty (Z01) that I received from Hyundai doesn’t cover my problem.

Filed Apr 24, 2026 · Airbags, Electrical · TX

The steering left side electrical components quit working at the same time without warning. This is all related to the Air Bag clock spring a serious safety defect that disables the airbag and possibly horn. I have taken the vehicle to a Hyundai dealership for diagnostics and this is what was found. "Needs immediate attention [Primary]: SSD : STEERING OR SUSPENSION DIAGNOSIS Air Bag - Clockspring Assembly / Spiral Cable: CLOCK SPRING HAS SHORTED OUT CAUSING ALL THE BUTTONS ON THE LEFT SIDE OF THE STEERING WHEEL NOT TO WORK This assembly consists of a clock spring, which is a coil that retracts and expands inside its housing as the steering wheel turns. Its function is to maintain electrical continuity for all the components on the drivers airbag.

Filed Apr 7, 2026 · Electrical · 63,000 miles · FL · fire

The contact owned a 2017 Hyundai Santa Fe equipped with a Rockland Electric Mobility Scooter Lifter, Part Number: 10101194. The contact stated that after the mobility scooter lifter was installed on the vehicle, the vehicle experienced electrical failures. The A/C became inoperable, and the hatch opened intermittently. The contact stated that while the vehicle was parked approximately a month after the lifter installation, the alarm sounded intermittently during the day. The contact observed the vehicle from the residence, but did not notice any abnormality. The contact installed the mobility scooter on the vehicle in the evening. The contact stated that the vehicle alarm sounded at night, and the contact noticed that the vehicle had caught on fire and there were flames coming from underneath the hood by the engine and firewall location. The vehicle was significantly burned from the front end to the trunk. The fire was extinguished by the fire department. A fire department report and a police report were filed. There was no property damage. There was no physical injury sustained. The contact sustained mental trauma, causing headaches and the right side of the lip to quiver. The contact had called Gregory Fox, an investigative reporter and anchor at WESH 2 News(NBC), who notified the manufacturer of the failure. The manufacturer followed up with the contact and informed the contact that a third-party investigation would be conducted to determine the cause of the fire incident. The vehicle was towed to a salvage yard, where a third-party investigation was conducted, and the manufacturer informed the contact that the fire was caused by the Rockland Electric Mobility Scooter Lifter. The vehicle was totaled. The failure mileage was approximately 63,000.

Filed Mar 26, 2026 · Brakes, Electrical · MI

Bottom brake lights will not work but top high brake light works. I was stopped by police three times. They state all three brake lights must operate.

Filed Mar 20, 2026 · Brakes, Electrical · CO

After performing regular oil changes, and even a new fuel pump sensor, I experienced an issue. Last oil change was within the past two weeks. Driving home from the mountains, I heard a knocking sound from the engine bay. I narrowed it down to all gears above 2500RPM, increasing knocking with RPM speed. I took it easy on the engine, mostly coasting down the mountain. Suddenly during acceleration on an uphill, a pop sounded, and copious white smoke started coming from the engine bay. I pulled over despite having no power brakes but I was fortunate to be near an off ramp in a rural area. Trying to troubleshoot roadside, i noticed fluid on the tie rod, but I wasnt able to determine what kind of fluid it was. When I try to start the car, there is one single click, the engine wont even attempt to turn over. Oil, battery and check engine lights are all on. After towing, I found that the fluid leaking from the vehicle is oil. The vehicle is currently at a transmission shop, but from my research, this isnt a transmission issue but a blown rod bearing the Hyundai engines are know for. I will be contacting a dealership to see if they will at least confirm my diagnosis.