2018 Kia Niro engine problems

Filed Sep 15, 2026 · Engine, Transmission · FL

The dealership is falsely reporting to Kia Corporate and the federal safety agency that Recall SC276 is 'completed' by only replacing a fuse. They are refusing to replace the actively leaking, fire-hazardous Hydraulic Clutch Actuator unless I pay an out-of-pocket diagnostic fee. They are violating federal recall safety mandates by trying to release a vehicle with an active, un-repaired recall leak.

Filed May 4, 2026 · Electrical, Engine · WA

On April 21, 2026, Go Kia Renton performed an oil change on my 2018 Kia Niro Touring (VIN). The car was in perfect condition just two weeks earlier — North Seattle Transmission did a full service on April 6, 2026 at 283,649 miles with no issues noted. Later that night while driving, the red oil light flashed. I pulled over immediately and called AAA. AAA towed the vehicle from Belltown [XXX] ) at 12:11 AM on April 23 to my house then at 9:14 AM towed it straight to Go Kia Renton. The AAA driver found oil leaking all over his tow truck. The car now has a dead battery and is showing Hybrid Control System / Low Voltage DC/DC Converter and Engine Control System codes. This appears to be a sudden engine seizure caused by oil loss shortly after dealer service. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 21, 2025 · Engine · NC

Just before Hurricane Helene, I brought my 2018 Kia Niro Hybrid to Asheville Kia (NC) after noticing coolant loss and white smoke coming from the exhaust. The dealership charged me $1,400 for a repair involving new gaskets and the EGR cooler. Within a month, the same symptoms returned. I returned to the dealership and explained I believed the original issue had not been resolved. I had done research and found reports of similar problems in other Niro Hybrids. I specifically mentioned the coolant heat exchanger as a possible source, but they dismissed my input and pushed a $3,500 muffler system replacement. I asked for diagnostic proof, and they initially showed a photo of the muffler with no visible leak. Later, they claimed a "small leak" was found during a pressure test — but the symptoms didn’t align. I then took the vehicle to John’s Kwik Lube in Spruce Pine, NC, where they confirmed the coolant heat exchanger was faulty — exactly what I had originally suspected. They repaired it with a simple workaround for under $200, and I’ve had no issues since. The faulty component (coolant heat exchanger) is not available for inspection, but I retained diagnostic records, pressure test results, and screenshots of the dealership’s estimate. I also documented that Kia’s quote system does not allow access to past service quotes, so I had to screenshot everything manually. The only symptoms were coolant loss and white smoke from the tailpipe, beginning shortly before the storm in September 2018, and recurring until the final repair later that year. The problem was confirmed by an independent mechanic, and partially acknowledged (though misdiagnosed) by the Kia dealership. No police or insurance inspection was involved. This situation posed a safety risk due to reduced visibility, potential engine overheating, and exposure to coolant vapors, especially during uphill driving. The issue is known among Kia owners and appears to be a recurring design flaw in the Niro.

Filed Jan 25, 2025 · Electrical, Engine · NY

Known issues with wiring cause check engine light to come on and also now the door open sensors to stay on. Just paid $800 for a known issue to the wiring that a Kia technical bulletin wss issued for, however the cost was left to the customer.

Filed Oct 31, 2024 · Engine · WA

Internal combustion engine coolant leaking out exhaust. The heat exchanger located in the catalytic converter system is leaking, leading to the ICE coolant draining. This leads to the engine overheating, and damage. Signs of the issue started with the coolant level lowering quickly, then the car heater stopped working. This confirmed by an independent mechanic.

Filed Jun 13, 2024 · Electrical, Engine · 140,000 miles · TX

The contact owns a 2018 Kia Niro. The contact stated that upon starting the vehicle, the vehicle was shuddering and failed to start. The battery charge was low. The HEV warning light was illuminated. The vehicle was taken to the local dealer but was not diagnosed or repaired. The dealer informed the contact that a field expert would be determining the cause of the failure. The manufacturer was not contacted. The failure mileage was 140,000.

Filed Mar 21, 2024 · Engine · WI

Coolant leak within the heat exchanger of the catalytic converter. Increases likelihood of overheating and engine damage. Especially when driving long distances, or within heavy traffic. Increases emissions as burning off coolant within exhaust.

Filed Jan 26, 2024 · Electrical, Engine · VA

Fire warning recall notice issued in July 2023. Follow up with both Kia and with Kia dealership that I purchased the vehicle from still says that there is no fix to this problem. THE PRINTED CIRCUIT BOARD (PCB) IN THE HYDRAULIC CLUTCH ACTUATOR (HCA) MAY BECOME CONTAMINATED WITH FLUID. A FLUID-CONTAMINATED PCB MAY LEAD TO AN ELECTRICAL SHORT CIRCUIT, THEREBY INCREASING THE RISK OF AN ENGINE COMPARTMENT FIRE WHILE DRIVING. With the potential of a fire risk while driving, why is the manufacturer not required to remedy this situation in a more timely manner. It has been over 6 months since the recall was issued yet the manufacturer is allowed to continue producing vehicles but not required to repair those vehicles that may be affected and cause significant risks to the driver at potentially other property. the federal safety agency should mandate inspection and repairs of recalled vehicles which should take a priority to the manufacturing process. Vehicles with recalls should not be allowed to go without repair especially when accidents are imminent and life-threatening injuries may occur. Additionally, trying to get an appointment with a local Kia dealer where I purchased the car has a wait of well over a month for them to even inspect the car. Between Kia not taking care of their vehicles and their dealers not being able to service vehicles, the federal safety agency really needs to evaluate this and create remedies for the safety of the vehicle and the driver. Waiting over 6 months for a recall is frustrating, dangerous, and unacceptable. Manufacturers need to take responsibility for recall notices and repairs in a much more timely manner. Safety over profit should be a priority. On a personal note. I purchased my Kia Niro hybrid new in 2018. It is one of the best cars that I have purchased in my '76 years. I have had virtually no problems with the vehicle and was a big proponent of Kia, but their lackadaisical attitude on recall repairs as really put a damper on my respect for their management and

Filed Nov 7, 2023 · Electrical, Engine · FL

Nothing has happened yet, but I am very concerned about my car catching on fire due to the recall notice I received. I want it fixed ASAP!

Filed Oct 21, 2023 · Engine · NJ

Got the recall letter but kia dealer and customer service have no info about when the remedy will be available. This is a major issue as I need to sell the car now to use the cash for other urgent matters. Dont even think the dealer will give a decent wholesale amount or take them on a trade. It is lowering the value and decreasing the demand as its a safety hazard for the vehicle which isnt fair . How long are they legally allowed to drag this out with no compensation to all those waiting ? Is there a class action suit ? Thank you for your help ! [XXX] [XXX] or cell [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)