2016 Hyundai Veloster fuel system problems

Filed Jun 24, 2026 · Fuel system · 19,000 miles · FL

The contact owns a 2016 Hyundai Veloster. The contact stated that gas fumes were entering inside the vehicle and exhaust fumes were present while driving the vehicle and while the vehicle was parked. The vehicle was taken to an independent mechanic on several occasions and to several dealers; however, the cause of the failure was not yet determined. The master cylinder was replaced, and the high-pressure fuel pump was replaced due to a reported internal fuel leak, but the failure persisted. The contact stated that while refueling the vehicle at a gas station, fuel leaked from the vehicle with a strong fuel odor. The manufacturer was notified of the failure. The approximate failure mileage was 19,000.

Filed Dec 9, 2025 · Engine, Fuel system · GA

While driving my 2016 Hyundai Veloster (VIN: [XXX] ) on the highway, the vehicle suddenly lost acceleration. I went from 60 mph down to 20 mph with no throttle response, and the car only continued moving briefly from momentum. I was forced to stop in unsafe highway conditions and had the vehicle towed home. Prior to this complete failure, the car had recurring transmission/drive issues: it would start, but when placed in reverse it moved backward, and when shifted into drive it still only moved backward. Despite repeated repair attempts, the problems persisted. A certified mechanic later inspected the vehicle and confirmed severe internal engine damage, including metallic noises, blue smoke, oil leakage from worn piston rings, and complete compression loss. The mechanic concluded the vehicle requires deep engine repair or replacement. These failures are consistent with widespread reports of Hyundai Veloster engine defects, which pose serious safety risks to drivers. My vehicle is now inoperable despite responsible maintenance and repeated attempts to fix the issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 4, 2025 · Engine, Fuel system · CA

I am the second owner of a 2016 Hyundai Veloster Base, purchased used at approximately 19,976 miles. Since then, the vehicle has experienced multiple major powertrain-related failures. At 49,196 miles, the first catalytic converter failed and was replaced. Later, both the engine and second catalytic converter were replaced by Kearny Mesa Hyundai, a certified Hyundai dealership in San Diego, CA. When I brought the vehicle to Kearny Mesa Hyundai, there were no warning lights or active diagnostic trouble codes. However, the dealership’s service documentation stated that a P0420 code (catalyst system efficiency below threshold) was present — a code that was not active when I dropped off the vehicle, raising concerns about diagnostic accuracy or documentation. Now, at 61,982 miles, I brought the vehicle to Hyundai Ontario due to delayed shifting and hesitation when accelerating. The dealership diagnosed internal transmission failure and quoted approximately $5,000 for repairs. There were no warning lights or codes detected, meaning this diagnosis is based solely on driving symptoms. The failure of two catalytic converters, the engine, and now the transmission — all within approximately 42,000 miles of ownership — raises serious concerns about the long-term reliability of this vehicle and possible manufacturing defects. The transmission symptoms pose a serious safety risk, especially when merging or accelerating into traffic. I am requesting that this vehicle be investigated for potential systemic issues affecting its powertrain components.

Filed Mar 7, 2025 · Engine, Fuel system · ID

The car stall when I'm driving

Filed Oct 29, 2024 · Fuel system · 119,000 miles · TN

The contact owns a 2016 Hyundai Veloster. The contact stated while driving approximately 70 MPH, the vehicle lost motive power. The contact stated there was no warning light illuminated. The vehicle was taken to a Midas where it was diagnosed and determined that the fuel pressure regulator needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 119,000. The VIN was unavailable.

Filed Oct 23, 2024 · Engine, Fuel system · NY

Shortly after finishing major repairs at my local dealer, I started to expirience, what I believe, now, to be a "low-end engine knock". Engine knock can usually occur due to oil starvation, where the connecting rod bearings are worn and debris enters the engine. So, I brought my car back to the dealer to ask them what this strange noise was I was hearing; I asked them if it could be the brand new clutch, or their equipment they left in the engine bay for me. They gave me an answer and it was to not drive the car anymore. One employee of the dealer even suggested "wrapping it around a telephone pole"... They told me what the repairs would cost and I had not qualified for a warranty extention so I left. I acquired a definitive diagnostic elsewhere and was shown the gravity of the situation. My oil filter had caught pieces of the engine and it was dubbed an engine knock. This incident took me completely by surprise. I regularly changed my oil and never saw my levels get so low that they would be considered empty. I have only owned the car for 5 years and it being only 8 years old, I was hoping to enjoy the driving expirience for years to come. That sensation has been replaced with apprehension and possible engine fire... how do I afford to buy a new car every 5 years if I can't drive the one I have now??

Filed Apr 11, 2024 · Fuel system · HI

Code: P0087 show up when I scanned it. I was driving on freeway and my car lose power suddenly. This could potentially cause accident because it’s was heavy traffic time.

Filed Mar 15, 2024 · Engine, Fuel system · IL

Knocking on engine. All service necessary for the vehicle has been up to date. Hyundai Dealer has said to wait for a recall. Rod bearing recall has happened and my vehicle was never recalled.

Filed May 16, 2023 · Fuel system, Transmission · AZ

Sudden power Loss when driving or turning. Engine began making noise check engine light came.on. parked made apt at deaser. ODB reader said was 02 sunsor bank one and camshaft poisition overclocked. Check engine light off when took to dealer. dealer said engine needs replaced 97k miles. Recent synthetic oil change 2 months prior to fail.

Filed Jul 27, 2022 · Engine, Fuel system · WA

I took my car to a dealer called Lee Johns in Everett WA for 2 recalls, but they told me I had problems with my catalytic converter and they replaced it under warranty at no cost to me. After 2 days they gave me the car and it did not work more than 2 hours and the engine light started blinking and from one moment to another it reduced the speed to 20 miles per hour. I called the dealer and they told me to take them, but to this day they only replied that the car warranty would only cover 55% for the replacement of the damaged engine. They gave me the defective car after they changed the catalyst and I gave them a working car that now doesn't work and they only tell me that I have to pay 4000usd so that they can repair it and they haven't given me any report of the engine revision because It failed, after they changed the catalyst, only telling me that I should pay and then make a claim or sue the manufacturer. I delivered my car to them on June 27 and to date they have it in their possession, leaving me unable to move and me having to assume the costs of renting and paying friends to pass their cars to me. I hope they can see my case since they wrecked my car.