2021 Kia Telluride engine problems

Filed Oct 16, 2026 · Engine · GA

the federal safety agency Vehicle Safety Complaint – 2021 Kia Telluride I am the original owner of a 2021 Kia Telluride with approximately 78,000 miles. My vehicle has experienced recurring mechanical and drivability concerns, including an intermittent check-engine light, a previously reported camshaft-related diagnostic trouble code, and hesitation during acceleration. Of particular concern, there have been instances when I have pressed the accelerator pedal and the vehicle has hesitated before responding. This delayed acceleration creates a potential safety concern, particularly when entering traffic, merging, or navigating intersections where predictable engine response is essential. Additionally, the vehicle has exhibited rough operation while reversing and unusually harsh engine behavior when the automatic engine stop-start system engages. Despite multiple visits to a Kia-authorized dealership, including a monitored 1,000-mile oil consumption test, these concerns remain unresolved. The dealership advised that the vehicle passed the oil consumption test but subsequently recommended a dynamic engine cleaning procedure. I was informed that the technician was approximately 85% confident this procedure would resolve the issue. However, no definitive explanation of the underlying mechanical problem was provided. I have requested written documentation of the diagnostic findings and the basis for the recommended procedure. I have also opened a formal case with Kia America Consumer Affairs regarding these unresolved concerns. I am submitting this complaint because I am concerned that the recurring acceleration hesitation and related engine symptoms may indicate a safety-related defect that has not been adequately identified or resolved. I respectfully request that the federal safety agency document these concerns and evaluate whether similar complaints involving 2021 Kia Telluride vehicles indicate a broader safety issue.

Filed Oct 9, 2026 · Engine · MI

I was attempting to accelerate on the freeway and the rpms kept going up but it felt like the engine didn't want to shift gears. Suddenly the rpms shot all the way up and then dropped to nothing and I was forced to coast off the freeway, thankfully we were by an exit. The vehicle had zero power and we were unable to move it off the road, despite assistance from passersby. The wheels were locked in place and would not move until the tow truck driver showed up and looked something up online to manually force the car into neutral. (Though it was displayed as being in neutral) This is a 2021 vehicle bought brand new and has been properly maintained. Approximately 2-3 weeks before this, my husband randomly checked the oil and it was about 2qts low. It was filled and seemed to be running perfectly fine so we didn't give it another thought until this happened but now we're wondering if this particular engine is prone to the excessive oil consumption that has been noted in several other kia motors.

Filed Oct 8, 2026 · Electrical, Engine · AZ

Vehicle was sitting all night and entered the garage in the morning and found the radiator fan at full speed. Car was not running, so backed it out, turned it off and the fan turned back on. Took it to a KIA dealer and kept it for a few days and just stated they couldn't duplicate the issue, although I couldn't get them to tell me technically what they checked. I kept the car parked outside for fear there might be an electrical issue and something overheats. Then was recently out and came out to my vehicle to find the fan running again. This time took multiple videos and it now consistently doing it. Took it home for the evening and disconnected the battery, and in the morning as soon as I reconnected the battery the fan started up to full speed again. Dropped it off to another KIA dealership and it was still doing it and showed it to the service advisor and gave him the videos. They are currently looking at it now. Also, there were never any warning lights or alarms that anything was wrong. There are so many postings out there on this issue on forums, FB, Telluride sites, etc., that I'm shocked there isn't at least a KIA TSB on this problem.

Filed Oct 5, 2026 · Engine · MI

On September 4, 2026, my son was driving our 2021 Kia Telluride on the highway at approximately 70 mph with cruise control engaged when the vehicle suddenly began making a clicking noise, followed by a catastrophic engine failure. We observed no oil-pressure warning or other advance dashboard warning before the failure. The sudden failure at highway speed created a significant safety risk. I am the original owner. The vehicle had approximately 115,000 miles at the time of failure. Its most recent oil change was performed on June 4, 2026, at 112,613 miles, approximately 2,400 miles before the incident. The servicing Kia dealership reported that the engine had a hole in it and essentially no oil remaining. The oil filter and drain plug were in place, and the dealership reported no external oil leak that explained the missing oil. An oil-filter-housing leak had previously been repaired in January 2026. The cause of the oil loss and engine failure has not been conclusively established. I am concerned about possible excessive internal oil consumption and the absence of an advance warning before catastrophic failure. I request that the federal safety agency investigate whether this condition affects other Tellurides and creates a risk of sudden engine failure or loss of propulsion at highway speed. Kia denied my initial request for goodwill repair assistance. The case has been escalated, but remains unresolved. The vehicle and failed engine are available for inspection through the servicing dealership.

Filed Sep 24, 2026 · Engine · MI

Unfortunately, beginning in June 2025, I experienced a serious engine problem. While driving, the vehicle began sputtering and stalled twice in traffic. I immediately brought it to the dealer, where I was told the engine had no oil, despite no prior warning of abnormal oil loss (no engine warning lights and no leaks). The service department added oil and initiated an Oil Consumption test. On October 4, 2025, the same problem occurred again. While driving, the Telluride began sputtering again, and the dealer again determined that the engine had no oil. I was charged for another oil change and instructed to complete another Oil Consumption test. During this process, the maintenance supervisor acknowledged that excessive oil consumption was a known and serious issue affecting Kia Tellurides and other models, and explained that engine replacement was the appropriate solution. I also observed another Telluride at the dealership undergoing the same type of engine repair. After completing the required testing, the dealer ultimately installed a rebuilt engine in my vehicle to address the excessive oil consumption problem with the original engine. I am now back in the same situation. On September 8, 2026, less than one year after the rebuilt engine was installed, my Telluride once again began sputtering while I was driving. I brought the vehicle to back to the dealer on on September 9, 2026. The service personnel again told me there was no oil in the vehicle, despite it being well within its recommended oil-change interval. More importantly, I was informed that the rebuilt engine currently installed in my vehicle is suspected of having the same excessive oil-consumption problem as the original engine. After following the instructions on yet another engine recheck and Oil Consumption test, I 've been told that the engine is burning oil at an exponential rate.

Filed Sep 21, 2026 · Engine, Transmission · OH

I purchased my 2021 Kia Telluride S new, with only 22 miles from the test drive. XXX (approx. 53,000 miles, vehicle age 18 months): The transmission failed while I was traveling approx. 75-80 mph on a major highway in [XXX]. Upon failure, the vehicle suddenly lurched as if the brakes had locked or the parking brake had been applied, nearly causing us to strike our heads on the dashboard and creating a hazardous situation for other traffic. After the failure, the vehicle would only operate in approx. first through third gears and reverse, and would not exceed 25 mph. We were forced to limp the vehicle off a busy six-lane highway. XXX: Due to parts delays, the vehicle was not returned until November 2022 after the transmission work. XXX (approx. four months later): The vehicle developed engine knock and excessive oil consumption. Advised this may have been related to oil degradation while the vehicle sat waiting for parts. Since then, I had to regularly check and add oil between oil changes. Despite low oil levels, no oil pressure warning light ever appeared. XXX (exact date unknown): While opening the sunroof at a stop, a loud crack occurred and pieces of the sunroof track, plastic and metal, fell onto me and my passenger. The glass is intact but became partially stuck open without the track to guide it. XXX: The engine knock worsened and became a squeal while driving approx. 60 mph. The vehicle lost power, requiring me to turn on hazards and coast off to avoid accident. Dealership mechanic advised that the engine had thrown a rod and blown the oil filter housing gasket. The vehicle is currently at the dealership and available for inspection. Kia has denied coverage despite the failure of a component linked to excessive oil loss and a recently extended 180,000-mile warranty, even after the engine threw a rod following a sudden loss of oil pressure. The failed transmission has likely already been disposed of. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 8, 2026 · Engine · IA

My 2021 Kia Telluride has developed progressively worsening engine problems without any warning lights ever appearing that may present a serious safety concern. Approximately two months ago, the vehicle began experiencing significant engine shaking and rocking. Maintenance and repairs were performed, and the symptoms temporarily improved. The engine symptoms later returned. The vehicle began making a noticeable ticking noise that progressively became much louder and occurred both while idling and during acceleration. The vehicle subsequently shut off after being driven to an independent mechanic. Multiple warning/diagnostic alerts appeared, and the vehicle would not remain running when restarted. The mechanic checked the engine oil and found it essentially empty. Approximately 4½ quarts of oil were added. The ticking noise continued despite the addition of oil. Later that same day, the engine developed a pronounced knocking noise that continued while driving. There was also a hot smell, and I had noticed discolored smoke coming from the exhaust. The vehicle is currently parked and is available for inspection. I have stopped driving it because I am concerned about an engine failure and the possibility of the vehicle shutting off or losing power while being operated. The vehicle has been maintained and I have documentation of its maintenance and repair history. The underlying cause of the severe oil loss and engine symptoms has not been determined.

Filed Aug 26, 2026 · Engine · MA

I believe my engine to be defective and Commonwealth Kia to be neglegent in finding the defect dispite having been tasked to repair an issue while my car was under warranty. I first mentioned the problem on the XXX visit at $85,000 miles. Asked them to check the filters. Mentioned again at the XXX visit at 92,000 there is not documentation of the complaints on either of these visits but it does say ont eh XXX visit that the car "STILL LACKS POWER..." indicating that there have been previous discussions about the issue. The car was at 99,000+ miles at the XXX visit (still under warranty) I returned on XXX and XXX and was told on 1/20 that they FINALLY found the problem and that I would have to pay to have the entire engine replaced. I have since done some research and the issues that I am having are very similar to the Class Action Suit against Kia and the THETA II engine. [XXX] I have also seen on multilple owners boards on social media and in reports found on the internet that 2020-2023 Kia Tellurides have been having the same issues as THETA II engine models. [XXX] I find it difficult to believe Commonwealth Kia Service have not heard similar complaints nor have the ability to diagnose the problem on the first or second mention of the problem (which was while the car was still under warranty) I have called Kia USA who can not help me due to the fact that I am the second owner. The car was sold to me as "Certified Pre-Owned" by Kia. I believe Commonwealth Kia willfully misdiagnosed my problems so as to push the replacement cost to me and not the warranty INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 17, 2026 · Engine · NC

I purchased this 2021 Kia Telluride new and have had it routinely serviced and maintained by authorized Kia dealerships. At approximately 60,000–80,000 miles, the engine began consuming excessive oil. I reported the condition to the Kia dealer at approximately 80,000 miles, while the vehicle was still within Kia's 10-year/100,000-mile powertrain warranty. The dealer initially recommended a tune-up, but the oil consumption continued. During a later visit, the dealer identified an issue involving the OEM oil-filter housing and replaced the affected component. Despite this repair and continued maintenance, oil consumption progressively worsened. The vehicle now has approximately 160,000 miles and requires approximately one pint of oil every 2–3 weeks. The current diagnosis indicates potential internal engine damage, including cylinder-wall scoring that may allow oil to bypass the piston rings and burn in the combustion chambers. I have been advised the engine may require replacement at an estimated cost of approximately $13,000. My primary concern is that this condition began and was reported to Kia while the vehicle was still under the powertrain warranty, but the repairs did not correct it. Continued excessive oil consumption and internal engine damage create a safety concern because they could result in low oil pressure, engine seizure, stalling, or sudden loss of propulsion while driving. The vehicle is available for inspection, and its maintenance history, prior complaints, dealer repairs, and current condition are documented through Kia dealership service records.

Filed Aug 12, 2026 · Engine, Transmission · FL

Was low on oil and check oil light don't go on have to put oil very 2 week because it get low and I don't have no oil leak at all I found out because the motor start shaking and making noise tow it home and mechanical came to check it out and didn't have oil he say I was lurking I was not in the highway because it could lock the mortar and cause a accident