2020 Kia Telluride: misfire or rough idle

Filed Aug 27, 2026 · Engine · WA

Vehicle experienced significant drivability issues including shaking/clinking at speeds over 50 mph, check engine light, and reported two-cylinder misfires. Engine oil level was critically low, not registering on the dipstick, requiring approximately 2 quarts added to continue driving. An independent mechanic inspection found excessive oil in Cylinder 2 and assessed that oil was likely leaking past the piston rings and burning, recommending a bottom-end rebuild or engine replacement. Kia dealership (Sunset Kia) inspection subsequently found a score mark in Cylinder 6 and two external oil leaks (oil pan gasket and oil filter housing). Kia approved goodwill repair of the external leaks only, after which I was instructed to drive approximately 1,000 miles for a follow-up oil consumption test. After that period, the dealership confirmed the engine was still consuming oil beyond the external leaks. Kia Corporate took approximately three weeks to review a goodwill request for engine replacement, ultimately denying it. During this three-week period the vehicle remained at the dealership, and I incurred over a week of out-of-pocket rental car expenses due to no loaner vehicle being available and no transportation assistance offered. The vehicle has fewer than 100,000 miles. I am concerned this reflects an internal engine defect (oil consumption/piston ring or cylinder wall issue) affecting the vehicle’s safe operation, given the drivability symptoms (shaking, misfire, near-zero oil level) that initially prompted this investigation.

Filed Jun 17, 2026 · Engine · 115,000 miles · MI

The contact owns a 2020 Kia Telluride. The contact stated that while driving at various speeds, the vehicle was consuming an excessive amount of engine oil. No warning light was illuminated. The contact stated that while driving at slower speeds, the vehicle lost automotive power. The vehicle was taken to a local dealer, where it was diagnosed with oil consumption and a misfire in cylinder #3. The vehicle was repaired; however, the failure reoccurred. Upon further inspection, the contact stated that as per the Kia App, the vehicle was diagnosed with error codes: P030300 and P030500. The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 115,000.

Filed Jun 8, 2026 · Engine · MD

Vehicle experienced catastrophic engine failure while traveling approximately 70 mph on a highway. I heard a loud popping noise and immediately lost power. The vehicle would no longer accelerate normally and I was forced to pull over. White smoke was visible from the engine compartment, and a large amount of engine oil leaked from the vehicle. This failure created a safety risk because it occurred at highway speed, resulting in sudden loss of power while traveling with surrounding traffic. The vehicle required towing and could not be driven from the scene. Prior to the failure, the vehicle had exhibited symptoms beginning around May 11, 2026. A check engine light illuminated and an independent mechanic diagnosed a cylinder 3 misfire and replaced the ignition coil. Following that repair, the check engine light returned. Additional symptoms included stalling at idle, knocking noises from the engine, and intermittent oil pressure warning lights. The vehicle was subsequently inspected by an independent mechanic who diagnosed a thrown connecting rod with damage to the engine block, including a hole in the engine near the transmission area. The mechanic advised that the engine requires replacement. The damaged engine is currently available for inspection. The vehicle has not been inspected by the manufacturer. No injuries or crash occurred, but the sudden engine failure and loss of power at highway speed created a significant safety concern.

Filed Feb 11, 2026 · Engine, Transmission · NY

I am the original owner of a 2020 Kia Telluride with 48,409 miles. My wife purchased it new. It has never been sold or transferred. It is fully covered under Kia's 10-year/100,000-mile Powertrain Warranty. What component failed and is it available for inspection? The engine is consuming excessive oil due to failed internal components—likely the piston rings. This has fouled the spark plugs and caused active misfires on cylinders 1,3,4,5. Codes: P0300, P0301, P0303, P0304, P0305. Kia acknowledges this defect in TSB ENG222, which defines consumption over 1 quart per 1,000 miles as abnormal. The failed components remain in the vehicle and are available for inspection. Has the problem been confirmed by a dealer? Yes. [Dealer Name] confirmed the misfire codes and excessive oil consumption. Despite being original owners with an active warranty, they refused to cover the repair. The advisor said they "only cover internal engine parts"—which is exactly what is broken. We were sent home with a flashing check engine light. Has it been inspected by manufacturer or others? No. Only the dealership. Kia Corporate has not inspected it. How was safety put at risk? A solid check engine light means active misfire and risk of sudden engine stall or seizure. Other Telluride owners report complete power loss on highways and intersections—no acceleration, no power steering, no power brakes. My wife and children drive this car. I fear for their safety every time they start the engine. Were there warning symptoms? Yes. Two weeks before the check engine light appeared, I noticed a slight shudder during acceleration that gradually worsened. The light came on solid, then began flashing within days. No oil light appeared. No other warnings. Kia advertised a 10-year/100,000-mile warranty. At 48,409 miles, they denied coverage for a known, documented defect. That is not a warranty. Not true. I request an investigation into the 2020 Telluride 3.8L engine. Thank you

Filed Jan 11, 2026 · Engine, Seats · TX

We have had multiple issues with this car. First the pearl white peeling off on hood and above the windshield. Second CV3 axles boots leaking on our vehicle and multiple others at the Kia dealership. Third burnin oil even with good maintenance records. 3rd sunroof won’t open or close now for no reason at all. 4th back seat now attempts to fold at random times. Even with our kids in the seat. 5th oil housing leak. 6th CEL comes on and off randomly causing it to run rough. 7th screen is now to have issues of not working right. We’ve had to pay out of pocket for multiple things. Including the paint. We’ve spoken to service department and common issue they don’t see why it’s not a recall by now. Dealership is no help. Beware

Filed Sep 14, 2025 · Engine, Transmission · MN

For the past year to year ½ I have brought my car in for concerns with idle, hesitation when accelerating, stalling out, etc. This has put me in compromised situations when in traffic, at stop lights and when trying to accelerate to get on the highway. I was told it was fine, until it was not. Now my engine needs to be replaced. What I discovered in my car was their worksheet on issues that they never shared with me. Identified issues on this report: Fault Code 6, PO300400 - history, cylinder misfire, PO30500 - history, cylinder misfire PO34100 When going back for a 'simple' 1000 mile oil check, I was told there was not enough oil loss to identify concern. When I checked my own oil after another 1000 miles, KIA then pursued. In researching, there is a history of these engine problems and engines needing to be replaced with KIA. This is unacceptable and has compromised safety and any value I hoped to have with my car.

Filed May 15, 2025 · Engine, Fuel system · TX

I have a 2020 Kia Telluride that I bought brand new from Kia. I have performed regular maintenance on the vehicle and performed the repairs required by any recalls. When my vehicle surpassed 75k miles, the vehicle started having issues with excessive oil consumption. I had my vehicle serviced at 75k miles with the oil changed. When my vehicle was passed 79k miles, the vehicle started stalling, piston misfiring, and engine started vibrating. I took it into the dealer, and they performed diagnostic tests. The determined pistons were working fine but my oil level was very low. This was around 4k miles after my oil change. Kia requires oil changes every 7500 miles. I had the dealer change the oil. Once again, when my vehicle was approaching 4500 miles, the vehicle started to vibrate, piston was not filing properly. I checked my oil level, and it showed very minimal oil on the dip stick. The oil level was well below that was needed for the engine to properly operate. I put closed to 5 quarts of oil to get the engine to the oil level it needed. I am concerned that the excessive oil consumption can lead to the vehicle stalling on the road resulting in collision with other vehicles resulting in bodily injury or harm. According to Kia the oil consumption is fine. How is consuming 5 quarts of oil in 4500 miles fine when the manufacturer states oil changes are required every 7500 miles? The engine itself has a capacity of 6.9 quarts. At the rate my engine is burning oil, I would need over 7.2 quarts of oil to drive 7500 miles. Additionally, having an engine continuously operating with low oil would result in engine damage and thousands of dollars in repairs. The problem I am having in my vehicle is experienced by thousands of Kia Telluride owners. It's the same problem Kia has had in the past with other models. Kia is trying to avoid repairing their defective vehicle and placing the burden on the consumer.

Filed Jan 6, 2025 · Engine · WI

Upon braking the vehicle would run rough and the engine would shut off completely. This was first noticed when my wife was turning into our driveway and turning across traffic. She was heading westbound and slowed down to take a left(northbound) into our driveway. Upon braking the engine started to run rough & as she accelerated to turn into the drive, the engine shut off completely. This left her stranded turned perpendicular to oncoming traffic. The oncoming traffic narrowly avoided an accident and left my wife shaken from the incident. I brought it into the dealer where after multiple days of investigating found the vehicle was 4.9l of oil low. There was no indication of low oil in the engine; no indicator light or sounding of low oil, prior to complete engine shut down. The dealership stated when the vehicle shut off, the low oil light would then turn on. This is possible as when it had shut off on me while bringing it to the dealer, there were 4-5 lights that would turn on when the vehicle shut off. The dealership performed an oil change, which it was near to the mileage for needing an oil change anyways. Since this was completed we have not had any issues since. I am working with the dealership currently on why the vehicle is consuming so much oil, but my main concern is there was no warning or indication before the vehicle shut off while in normal driving conditions. I called Kia service and the dealership today and they stated the light should come on when there is less than .5 qrts of oil left in the engine. They believe I did not reach the threshold for the light to come on, but again my concern is the only first indication of low oil should not be my vehicle shutting off in an unsafe condition.

Filed Feb 29, 2024 · Engine · OR

2020 KIA TELLURIDE 41,000 miles: Engine overheated and ceased while on the freeway. Head Gasket blew, coolant hose had a hole the size of my fist on one side and the other clean split, along with cylinder 3 and 5 misfiring. I lost power and was able to go 25 mph on the freeway and lots of white smoke coming from the hood of the car. Semi trucks were slamming on their brakes to avoid hitting me as it was a dark foggy evening. The engine failure on the freeway could have easily caused multi vehicle collisions involving semi trucks resulting in casualties and loss of life. After 2 months in the shop the dealership has approved a new engine, however they don't know when they can get it in and no time frame when I will have my vehicle back. There was no warning and dealership confirmed there would not have been a warning until after the engine failed. I have maintained all maintenance schedules. There is a Facebook group with many similar stories of engine failures

Filed Jan 26, 2024 · Engine · OR

With 40k miles on the car driving on the freeway the coolant hose burst without any warning, it didn’t come off, it was weak and split. This caused head gasket damage and cylinder 3 and 5 to misfire with coolant getting in the cylinders. It was dark and foggy out and the car was over heating due to the failures. I lost power and could only go 25mph on the freeway. Semi trucks were honking flashing their lights, passing me and one slammed on the brakes to avoid hitting me due to how dark it was. Even though I was driving with my hazards on. I pulled over as soon as I could, but had a panic attack during the ordeal planning out the best way to die. Sounds dramatic but with all the smoke coming from the car I thought it could blow or get hit by a semi. Looking at online groups there are issues with the Telluride engines that are creating dangerous situations. It’s a matter of time before this problem causes a serious injury or death. I know others that have made complaints to Kia and NHSTA. When is this problem going to be taken care of?? My car has been at the dealership since Dec 19 2023. I am waiting to here back from Kia if they will cover the engine under warranty. The dealership said they had another Telluride with engine failure in Oct 2023 that Kia did not cover under warranty. The dealership has confirmed all these statements. There was no warning that there were any weak spots in the hose. No leaks or warning lights until it left me stranded on a dark foggy night on the freeway. Since Kiefer Kia in Eugene, OR still has my car I have not received any paperwork yet