2017 Hyundai Ioniq Hybrid problems

“Vehicle/Component: Hydraulic Clutch Actuator (HCA) / Electrical / Hybrid Powertrain Associated Recall: NHTSA Campaign Number 18V-260 (Hyundai Campaign 176) Complaint Description: My 2017 Hyundai Ioniq Hybrid is experiencing a dangerous failure of the Hydraulic Clutch Actuator (HCA), causing the "Check HEV" warning light to illuminate and severe drivability issues. This vehicle was previously included in NHTSA Campaign 18V-260 (Hyundai Recall 176). However, the manufacturer's chosen remedy in 2018 was inadequate and failed to permanently cure the safety defect. According to Hyundai’s defect report, the root cause of the recall is internal manufacturing burrs on the HCA housing cylinder block that degrade the oil seal over time, allowing fluid to leak onto electrical components and create a fire hazard. During the 2018 service visit, the dealership only replaced the outer "phase cap" rather than replacing the defective housing block itself. The underlying manufacturing defect (the internal burrs) has now completely destroyed the internal seals, resulting in a live manifestation of the exact safety defect and fire risk described in the original recall. A Hyundai…”

“After the Dealership, Michigan City Hyundai (MCH), performed part of the needed repairs, I became aware of what could/would have been a fire hazard (as evidenced by brownish/black heat spots, on the metal cover of the hybrid battery, under the rear seat. To maintain its recall-denial, MCH blames the hybrid starter generator (HSG) for the damage to the hybrid battery. The noted heat-spots prove otherwise - the power relay assembly (the subject of one of the recalls related to my car), and its malfunction and consequent generation of excessive heat, is what caused severe damage to the hybrid battery. The other failed component (hybrid system generator - HSG) is directly related to the hybrid clutch actuator (HCA), which is the subject of the 2nd recall affecting my car. The malfunction of the HCA is what damaged the HSG. The NHTSA database shows no open recall affecting my car VIN, is because dealer IL093 (who sold me the car around April 2025), logged both recall remedies as applied in Hyundai's internal database. The selling dealer (IL093), which claims to have completed the Power Relay Assembly and Hydraulic Clutch Actuator recalls on my vehicle, was under the…”

“I was driving my two young daughters (ages [XXX] and [XXX]) to school, in clear conditions, when we suddenly heard a static-like noise. Instantly, the car's check engine light and check EV battery light came on, and I realized I could no longer accelerate. I immediately pulled off to a safe shoulder and turned the car off and then back on. The car would not move. I exited the vehicle and THANKFULLY left my car door open. I walked around the vehicle and immediately called my husband for help. Within seconds, my [XXX] daughter, who was sitting directly behind me in the rear driver's seat, told me she saw smoke. I went to open her door and realized it was locked. My key fob and door lock would not unlock her door. I reached through my seat to open her door and instantly saw the smoke coming from a vent just to the left of her legs. I unbuckled her and pulled her out, and climbed through the vehicle to get my [XXX] unbuckled and safely out of the vehicle. I cannot stress enough how grateful I am that my car door was left open because I don't believe I would have been able to break the glass to get my daughters out. The could have easily died. Within a minute of the…”

“The contact owns a 2017 Hyundai Ioniq Hybrid. The contact stated that the vehicle failed to start with several unknown warning lights illuminated. Additionally, the message "Starting Engine to Avoid Battery Discharge" was displayed. The vehicle was later towed to the local dealer who diagnosed that the 12-volt lithium battery had melted and expanded and needed to be replaced, along with the power relay assembly and fuse. The vehicle was not repaired. The manufacturer was contacted. The contacted stated that the vehicle was previously serviced and inspected under NHTSA Campaign Numbers: 22V459000 (HYBRID PROPULSION SYSTEM) and 18V704000 (HYBRID PROPULSION SYSTEM). The contact stated that the vehicle had experienced the failure listed in the recalls. The failure mileage was 135,262.”

“I own a 2017 Hyundai Ioniq Hybrid VIN: [XXX] that is covered under Recall 232 (NHTSA 22V-459) related to a defective Power Relay Assembly that poses a fire risk. I brought this issue to Hyundai 3 years ago and was told my vehicle was serviced. That turned out to be false. Recently, my car stalled on the road due to the exact electrical issue covered in Recall 232. I had it diagnosed by an independent mechanic, who confirmed it’s tied to the recall. I had the vehicle towed to a Hyundai dealership to have it repaired, but they: •Refused to prioritize the recall inspection •Attempted to charge me $230 for diagnostics •Told me it would take a week or more just to inspect the vehicle •Denied the urgency of the recall, despite the known fire hazard I informed the dealership service manager Tom Swire I was recording, and he still refused to put his denial in writing. I have the recording. Due to their refusal, I was forced to tow the vehicle to a second dealership at my own expense. Hyundai Corporate has opened a case file, but told me I must wait 2–3 days just to speak with a case manager despite this being a federally mandated safety recall tied to real-world safety…”

“THE 12V ION BATTERY SYSTEM PART NUMBER 37507-G2120 (ICCU) BATTERY FAILED WHILE DRIVING, CAUSING GAS ENGINE TO TURN OFF, WHICH CANCELS POWER BRAKING AND STEERING, MAKING VEHICLE IMPOSSIBLE TO CONTROL. READ MANY REPORTS ON REDDIT AND IONIQ FORUMS OF THIS HAPPENING. NO. IT IS UNOPERABLE THERE WAS NO WARNING WHAT SO EVER. NO LIGHT, NO SYMBOL, NOTHING. WAS TRAVELING 40 MPH ON A BUSY ROAD WITH FAMILY, DURING A LANE CHANGE THIS HAPPEND AND THE VEHICLE TURNED OFF COMPLETELY. I COULD NOT CONTROL VEHICLE, AND WENT INTO A DITCH. IN THE PROCESS WE WERE NEARLY SIDE SWIPED BY A LARGE PICK UP TRUCK WHOM ALSO WENT IN DITCH. THE 12V BATTERY WAS DEAD COMPLETELY, WOULD NOT START THE GAS ENGINE. JUST WAS DEAD. IM LUCKY TO BE HERE TELLING OUR EXPERIENCE.”