Hyundai Veloster knocking problems

Filed Oct 7, 2026 · Engine · 100,144 miles · TX

The contact owns a 2016 Hyundai Veloster. The contact stated that while driving 15 MPH, there was a knocking sound coming from the engine, and the check engine warning light illuminated. The contact stated that due to the failure, the vehicle failed to accelerate. The contact stated that there was an oil odor coming from the vehicle while entering and inspecting the vehicle. The vehicle was towed to the dealer, where it was diagnosed with engine failure. The contact was informed that engine needed to be replaced. The vehicle was not repaired. The contact stated that there was oil leaking from the vehicle while at the dealer. The manufacturer was made aware of the failure by telephone and email, and several cases were opened. The failure mileage was approximately 100,144.

Filed Sep 10, 2026 · Engine · IL

The contact owns a 2012 Hyundai Veloster. The contact stated that while driving 37 - 40 MPH, the accelerator pedal was depressed, and the vehicle made knocking sounds. Additionally, while parking the vehicle, there was a fuel odor and smoke coming from the vehicle. The check engine warning light was illuminated. The vehicle was diagnosed by a mobile independent mechanic, who determined that the vehicle needed an oil change and that there was engine failure with the vehicle.

Filed Jun 8, 2026 · Engine · TN

2016 Hyundai Veloster with 1.6L Gamma engine experienced repeat catastrophic engine failure consistent with the federal safety agency Recall 20V746000 / Hyundai Recall 198 for connecting rod bearing failure. Failure #1: At 124,036 miles, engine developed loud knocking noise increasing with RPM, check engine light, and DTCs P0300 (random misfire) + P0303 (cylinder 3 misfire). Dealer repair order documented "broken intake valve on cylinder 3." Engine was replaced at my expense because Hyundai stated VIN was not covered under Recall 198, despite failure mode matching the recall. Failure #2: Hyundai replacement engine failed at 164,410 miles (40,374 miles on replacement engine). Identical symptoms returned: loud metallic knock that increases with RPM, same DTCs P0300/P0303, misfire cylinder 3. Vehicle is currently inoperable. Safety Concern: the federal safety agency Recall 20V746 states connecting rod bearings "may wear prematurely, which over time can result in engine damage" and "can increase the risk of a fire." Both of my engines suffered catastrophic internal damage at ∼40k-50k mile intervals with identical codes and cylinder 3 failure. A broken intake valve is engine damage directly caused by bearing wear allowing piston-to-valve contact. This is a pattern defect. My VIN was excluded from the recall, yet suffered the exact failure twice. The replacement engine supplied by Hyundai had the same defect. This presents a safety risk of sudden engine stall, loss of power, or fire while driving. Requested Action: Investigation into why VINs experiencing the exact failure mode are excluded from Recall 20V746, and assistance obtaining remedy from Hyundai.

Filed Apr 29, 2026 · Engine · IN

I am reporting a safety-related engine defect involving sudden internal engine failure, excessive oil consumption, persistent bearing knock, and overheating of the catalytic converter. The vehicle repeatedly triggered Bank 1&2O2 sensor fault codes due to oil blow-by and thermal overload. A certified mechanic documented the engine is failing internally and that the cat. converter has been damaged as a direct result of engine defect. The failure pattern is consistent with known Hyundai engine defect investigations involving bearing wear, oil consumption, stalling, and fire risk. The overheating cat. converter presents a significant safety hazard, including potential engine seizure. I purchased the vehicle used in March 2025. I am the third owner. Despite maintaining the vehicle responsibly (Regular oil changes), the engine failure progressed rapidly. Hyundai Motor America has denied a goodwill repair solely on the basis of mileage, even though the defect clearly originated long before my ownership and aligns with previously identified safety-related engine issues. Additionally, Hyundai's records show that this vehicle had an engine-related recall active during prior ownership period; the recall was never performed by the Hyundai dealership that sold the vehicle to the previous owner. This raises concerns about improper recall handling and whether the defect should have been corrected before the vehicle was resold. Given the safety implications, the documented defect pattern, and the unresolved recall history, I am requesting the federal safety agency's review of this matter. The engine failure poses a serious safety risk; Hyundai's refusal to address a known defect, the vehicle is unsafe to operate. Timeline: 2014 Hatchett Hyundai West, KS 17,665 mi.; 2017-H. West serviced vehicle, 58,918; 2019-Engine powertrain alert 83856mi; 2020- Edmund Hyundai, OK-engine power train 100179 mi; 2021- Edmund 145418mi.; Hy. Noblesville, IN 167,603mi.; 2024 - H.N. 171937; 2025 - denied repair 188890.

Filed Apr 22, 2026 · Engine · NE

The car goes into limp mode in the middle of driving on the interstate or usually at higher speeds and loses speed quickly. This has put me at high risk for accidents when traveling between cities and has left me stranded on dangerous parts of the interstate at times. I have taken it to my Hyundai dealer I bought the car from and they said there is a knock in the engine and the whole engine would need replaced and I cannot afford that ($12k) but the car only has 125k miles on it and I want to keep it for as long as possible because it’s my baby. I do not think it has been inspected by anyone but my dealer yet but I am willing to let anyone look at it in order to get it fixed without paying an arm and a leg. The car did have some issues prior to this issue that were recalled and fixed, but this happened out of nowhere and when it does happen the engine light flashes and it goes into limp mode. The light currently stays on because of the O2 Sensor though, but that is not a big issue. I have to use a OBD2 Scanner to clear the engine knock code every time it goes into limp mode in order to drive it properly and even then it will go back into limp mode eventually. My car started having issues probably a year or two ago. I also want to note I know a girl who used to have the exact same year, make and model of car as me and had the exact same issues of going into limp mode and such so it is not just a random issue of mine.

Filed Apr 11, 2026 · Electrical, Engine · OK · crash · 1 injury

Incident Description: I purchased a 2016 Hyundai Veloster (VIN: KMHTC6ADXGU255844) in May 2025. Shortly after purchase, the vehicle began exhibiting serious mechanical issues, including engine knocking, excessive oil consumption, stalling, misfiring, and loss of power. Despite these ongoing issues, the vehicle is listed as having Recall 198 completed. However, the symptoms associated with that recall continued and progressively worsened. The vehicle ultimately stalled in traffic while I was making a turn, resulting in an accident. In a separate incident, after exiting the vehicle and believing it to be in PARK, the vehicle moved unexpectedly and ran over me, causing serious physical injuries including fractures. Prior to these incidents, the vehicle had ongoing mechanical issues that were not properly resolved. The vehicle also required repeated jump-starts and became unreliable to operate. Additionally, there are discrepancies in the service records. The vehicle was towed to a dealership on or about June 8, 2025 and remained there until approximately July 15, 2025. However, the documentation provided reflects only a limited number of service days and consolidates multiple visits into a single summary. Due to these inconsistencies and the continued presence of failure symptoms, I am unable to verify that recall-related repairs were properly performed. These incidents raise serious concerns about engine failure and possible unintended vehicle movement, both of which present significant safety risks.

Filed Mar 26, 2026 · Engine · 161,000 miles · UT

The contact owns a 2017 Hyundai Veloster. The contact stated that while her sister was driving approximately 65 MPH, the vehicle stalled. The driver pulled over to the side of the road. The vehicle was able to be restarted, but made an abnormal knocking sound. The check engine warning light was flashing. The vehicle was towed to the residence. The dealer was contacted and informed that the vehicle needed to be diagnosed to confirm whether it was covered under warranty. The dealer informed the contact that towing assistance would be provided; however, the dealer drove the vehicle to the repair center, where it was diagnosed, and metal debris was found in the oil control solenoid. The vehicle was not repaired. The vehicle was driven back to the residence. A mobile independent mechanic diagnosed the vehicle and recommended either the rod bearings or engine replacement. The manufacturer was notified of the failure and contacted the dealer. The manufacturer then informed the contact that the dealer advised that the vehicle could not be diagnosed or receive a free repair unless unrelated repairs were first performed. The manufacturer denied a Goodwill Assistance. The failure mileage was approximately 161,000.

Filed Mar 16, 2026 · Engine · OK · crash · 1 injury

TRAUMATIC CRITICAL FAILURE At [XXX] (XXX), in p/u spot, put car in P, got out, reached in to grab wallet when car lunged into R, as if being driven. Ran over & drug me until it hit another car to stop it. serious pain in L ribs (previously broken & healed 5 yrs prior), felt like sternum re-broken from accident prior year, broken & healed. Back pain. Onlookers horrified & called 911. Taken by ambulance to Baptist Medical Center3300 [XXX] . I told ER Dr about injuries. CT Scan performed, broken ribs, sternum broken & displaced & fracture in spine. MRI completed yr prior after accident & only break was sternum. I have CT Scan & MRI results. Two wks later, in severe pain w ribs, wondered if I had pneumonia (I'm 62),, went to Urgent Care [XXX] took x-rays & called ambulance to pick me up, went to [XXX] [XXX] . Treated for rib & back pain & had a pleural effusion, most likely related to accident. Lost so much income, finally drove & about a mth later, at window at Jack in the Box, put car in P as I waited, after about 1 min, car started going fast into R, wouldn't stop, I had to turn car off. Fixed at Firestone. Broken shifter cable. About month later, still issues, Car threw itself into D when trying to go in R while driving. I assumed car wouldn't go in R. Took to Firestone next day. They said nothing wrong, went in all gears fine other serious car issues from day 1, currently at [XXX] Hyundai [XXX] Issues w car from day one, issues w SM at dealership that did work-alternator, starter, battery, tried to commit fraud, kept car hostage for wk, wouldn't give paperwork when asked for recall 198 Car engine knocking loud, kept running when turned off, consuming massive amts oil, began stalling, causing accident, further issues & my putting $ into car INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 12, 2026 · Engine · CA

When changing vehicle oil it has been noticed that there is contaminants appearing to be metal bits/glittery could possibly be rod bearing material. Also have noticed fluctuating idle

Filed Mar 3, 2026 · Acceleration, Engine · 100,000 miles · AR

The contact owns a 2012 Hyundai Veloster. The contact stated that the vehicle was taken to the local dealer for an unknown recall repair. Upon retrieving the vehicle, the check engine warning light illuminated. The reverse and drive gears were inoperable. The vehicle was towed to the local dealer, where an unknown diagnosis was provided. The vehicle was repaired, but the failure recurred. The contact stated that the transmission was inoperable, the starter, the engine light were blinking, and the vehicle was slow to move. There was smoke coming from the vehicle. There was an abnormal knocking sound coming from the engine. The manufacturer was not contacted. The failure mileage was approximately 100,000.