I had my engine replaced in Nov 2024 due to excessive oil consumption. I was required to do an emissions update due to a recall on my car. Once the dealer did the update, it caused my check engine light to come on and now I need a new catalytic converter, which was all due to the excessive oil consumption. Hyundai dealer knows this but they are telling me I’m responsible for replacing it. It should be replaced by Hyundai not me. It was the issue with the engine.
2018 Hyundai Santa Fe Sport engine complaints
Page 2 of 8: complaints 11 to 40 of 208, newest first, as owners wrote them.
2018 Hyundai Santa Fe Sport. Purchased January 2026 took to Oxmoor Hyundai Service Center March 2026. February 2026 began using oil at a measured rate of 700 miles per tank of oil. Used 3 full tanks of oil within the month of February. Oil lights and engine lights on and off and flashing during this time. March 8, 2026, engine light flashed and then stayed on continuously. Engine shook and stuttered and made a loud noise. Engine stalled while I was driving at 35-40 miles per hour. I was able to continue driving to my home with the stuttering and stalling. The next morning I drove it to the Oxmoor Hyundai Service Center. I told relayed the timeline of all symptoms I had experienced over the 2 month lifetime of my ownership. They did not attempt to reproduce the issue. They only entered "shakes in reverse" as the customer provided issue on the intake information. Service Center performed diagnostic, found cylinder misfires on cylinder 2 and cylinder 4. Replaced spark plugs to resolve Cylinder 2. Cylinder 4 continued to misfire. Used Borescope and found broken valve. They did not address the scoring on the cylinder of the valve. Recommended engine replacement. Advised it would not be covered under a warranty because the rod did not break. The oil consumption was proven with documentation from multiple Valvoline visits and the vertical scoring was present on the cylinder with the broken valve in the borescope photo. The Service Center refused to do a Boring Clearance Test or any other test that would prove the engine should be covered under an extended warranty or class action settlement. It wasn't until I reviewed HMA documents uploaded to the BBB Arbitration, that I realized that the information I initially gave to the Service Center of all the symptoms with timelines had not been entered into the system for diagnostic review by Techline. Arbitrator denied my claim under the theta settlement because the rod had not broken yet, BUT she said my engine was defective.
The engine valves and cylinders keep failing every 6 months. I have to spend another $1,800 to get it fixed. I doe this TWO TIMES last year. My car has the Theta 2 engine
While driving on the highway at approximately 70 mph with a heavily loaded vehicle, my 2018 Hyundai Santa Fe Sport 2.4L suddenly lost power and entered limp mode. The check engine light flashed and diagnostic code P1326 was stored. During limp mode the engine was banging hard, almost like it was seizing and then releasing repeatedly. This is consistent with connecting rod bearing failure, not wrist pin failure. P1326 is generated by Hyundai's Knock Sensor Detection System (KSDS), specifically designed to detect abnormal vibration consistent with connecting rod bearing failure — a known defect covered under Hyundai's Theta II engine warranty extension. Prior to this event the engine had been consuming oil abnormally. Approximately 1,300 miles after my last oil change the oil level had already dropped to the low mark on the dipstick, a significant change from normal operation. The vehicle was towed to a Hyundai dealership where it remains today. The dealership confirmed cylinder scoring and wrist pin damage. Hyundai is attributing the failure solely to wrist pin failure to avoid Theta II warranty coverage. I believe the wrist pin damage is downstream damage caused by the underlying rod bearing defect. My safety was directly at risk at highway speed. The vehicle has approximately 140,000 miles and is within the 15 year/150,000 mile Theta II warranty extension. A Warranty Prior Approval has been submitted to Hyundai Motor America and has been unresolved since March 24, 2026.
My 2018 Hyundai Santa Fe Sport equipped with a Theta II GDI engine began exhibiting excessive oil consumption, engine knocking, and cylinder misfires consistent with the known Theta II engine defect covered under the Hyundai class action settlement. Prior to the failure, the check engine light illuminated and I experienced repeated misfires and audible engine knocking. The vehicle required frequent oil additions between oil changes due to excessive consumption. The vehicle was taken to an authorized Hyundai dealership where a diagnosis confirmed a burnt valve inside the cylinder head. The dealership recommends replacement of the cylinder head or complete engine replacement to correct the issue. The dealership performed a bearing failure test and attributed the burnt valve to carbon buildup. However, excessive oil consumption in a GDI engine directly accelerates carbon buildup on intake valves, as burning oil deposits carbon on valve surfaces preventing proper seating and causing overheating and valve failure. The carbon buildup is therefore a consequential result of the Theta II oil consumption defect, not an independent cause. The safety risk is significant as engine misfires and knocking while driving create unpredictable loss of power and potential for stalling in traffic. The vehicle is currently not reliably operable. The manufacturer has been contacted regarding coverage under the Theta II settlement. The component is available for inspection upon request at the servicing dealership
I own a 2018 Honda Santa Fe it is using oil so fast. I know that there is other people complaining about the oil consumption so my engine just blew up because I had it changed on March 13 brand new oil change and on Monday night the engine blew up.. The people who changed my oil said that there have been a complaint that they have been using so much oil and I have talked to Hyundai about this and they refuse to do anything Now I have a Hyundai Santa Fe that is no good to me because I personally can’t afford a new engine/motor
The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving 30 MPH and attempting to accelerate, the vehicle hesitated, with the check engine warning light illuminated. The vehicle was driven back to the residence. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was not notified of the failure. The failure mileage was 141,654.
I was told by a mechanic that something electrical is wrong with the vehicle it causes the engine to misfire. Different issue than before.
I bought a 2018 Hyundai Santa Fe from a dealership in May of 2023. Ever since then I have paid around $8,000 in repairs for this car. These repairs have been so expensive and time consuming that last year I wasn’t able to drive it for 6 months because it was in the shop for most of the year. I had to fix the Fuel pump, the Battery, timing chain valve TWICE, O2 sensor , Catalytic Converter, Engine valve, cylinder 1 & 3 and NOW I have to fix cylinder 2 & 4 & that cost again around $2,000 to fix. I am constantly stressed out, crying and becoming broke because I have to keep on repairing this car. I use up all of my tows every year because my car always shuts off on me while I am driving. I am at the point where I want a refund on the car and I want to get rid of this vehicle. I do not feel safe driving on the highway or driving with my two kids and I am currently pregnant again and this car isn’t safe for a family. I am constantly feeling broken down and worthless because I can’t even keep this car a float.
Enterprise car sales sold me this vehicle when it had 3 open recalls on it. The vehicle itself was a problem from the beginning. When I took it in for it's first oil change the mechanic told me it had no oil in it. He said they sold me a car that is notorious for consuming oil and or seizing or blowing up. I had the engine replaced on this car already and I just took it in for it's first oil change and it was already consuming oil. I want a new car but enterprise is telling me this is my problem
I drove 2.5 hours north to a Marine brother's father's funeral, who unexpectedly passed. I started my drive home and made it to Yorktown in about 15 minutes, and the engine light came on, started flashing, and went into limp mode. I pulled over on I-69 to shut it off, pulled the dipstick, and the oil level was full. I pushed the Bluelink button on my rearview mirror, and HMA sent a tow truck to tow the vehicle to a local dealership about 10-12 minutes away. The dealership did not inspect the vehicle until the following Monday, since it was Friday, three weeks ago. The dealership found DTC codes for misfires in cylinders 1 and 2, multiple-cylinder misfire, and too-high pressure in all four cylinders. The vehicle has had the knock sensor replaced, a KSDS ECM update, and a series of gaskets replaced. It has been burning oil since 69,362 miles and is now not operational, 2.5 hours from home. HMA has declined to replace the engine on a vehicle involved in a class action settlement due to problems with several completed replacements. The dealership has followed the manufacturer's process, and, due to the engine not producing a code it had at 87,986, but now not capable due to piston damage, cylinder scouring, and spark plug damage, the manufacturer has declined a goodwill replacement. The engine failure did put others in harm's way, as it did me when having to pull off the busy interstate to inspect the obvious failure. I have been driving a rental since this situation occurred, have a vehicle that is not operational, and a manufacturer that is not assuming responsibility for the catastrophic failure. I have read numerous forums across several platforms about the Theta 2 engines. The vehicle has been serviced as needed, including multiple requests to fix or repair the engine noises it produced, when the oil level became low, and oil had to be added.
I am reporting a serious safety concern involving a 2018 Hyundai Santa Fe Sport with approximately 132K miles. While driving at highway speed, the vehicle suddenly lost power/velocity and the engine light flashed. This created an immediate safety hazard, as maintaining speed is critical in highway traffic. Within seconds, the vehicle regained power and the warning light turned off, giving the impression that the issue had resolved. Shortly afterward, while exiting the highway, the vehicle began shaking and felt as though it would stall but was able to drive home less than one mile. A mechanic retrieved misfire codes for cylinders 2 and 4. Further inspection revealed internal engine damage in cylinder 4 requiring major rebuild. A full deconstruction revealed that one of the valves in cylinder 4 had partially broken. This failure occurred with little to no warning and involved a sudden loss of power at highway speed, which could have resulted in a serious accident. The vehicle’s warning systems did not provide adequate or persistent alerts prior to significant engine failure. Over the last 6 months it began consuming oil frequently requiring weekly checks, however no warning systems or errors to indicate an underlining concern. Based on research, similar Hyundai vehicles have documented issues involving excessive oil consumption and internal engine damage without sufficient warning. This raises concerns about a potential safety defect affecting engine performance and failure detection.
Engine-Excessive oil consumption. Other-backup camera does not work and hasn’t for some time is 2028 sant fe sport included in recall
2/27/26 Kept regularly scheduled oil changes with dealer. Car began to knock and lose power, Oil light is periodically flashing on and check engine light came on. Took car to Valvoline oil change-they state no fluid on the oil dipstck. Scheduled oil change was not for another month. No oil leaks at all. Vehicle is bucking and knocking and loses acceleration. I have an appt at the dealer tomorrow3/2/26 and am hoping hyundai will cover any necessary repairs as they have multiple Technical service bulletins about this.
The contact owns a 2018 Hyundai Santa Fe Sport. The contact received an undisclosed recall notification, and the local dealer was contacted; however, there were no appointments available. On a separate occasion, while driving at an undisclosed speed, the vehicle jerked, and the check engine warning light illuminated. The vehicle was taken to an O'Reilly's Auto Parts to be diagnosed, and DTC: P1326 was retrieved. The vehicle was taken to the dealer and the contact was informed that there were damages to the engine caused by engine misfire. The dealer was in the process of determining if the engine needed to be replaced. The contact waited and then called the dealer and was informed that DTC: P1326 was not the correct code and that there was another fault code related to the recall. The contact was informed that the repair would be an out-of-pocket expense. The vehicle remained at the dealer unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 120,000.
engine cut out on highway, check engine light flashing. Car would not exceed 50 mph on highway and would hesitate/jump trying to go up any hill/incline. Took to mechanic and vehicle had P1326 knock sensor code. There appears to be a service campaign (Campaign 966/T3G) for 2013-2018 Sanat Fe Sport vehicles, but when i enter my VIN campaign does not appear. This is a safety risk/hazard and should be covered by the campaign/addressed by dealer. Car has always been well maintained and adhere to service schedule.
The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving at 55 MPH, the engine made a knocking sound, and the vehicle started shaking before starting to smoke. There was no warning light illuminated. The vehicle was towed to the dealer, who determined that there was a hole in the engine block and that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and informed the contact that since Service Campaign: 953 (ECM & Cluster Update) was not completed in a timely manner, the engine replacement was not covered. The contact had not received the notification for Service Campaign: 953 (ECM & Cluster Update) or owned the vehicle when the Service Campaign had started. The failure mileage was approximately 122,000.
My vehicle is using excessive oil. I first noticed this around 80 000 miles. Initially it started off with not being able to get the 5000 miles before next oil change and dropped to around 4000 miles. It then dropped to 3000 and now less than a 1000 miles before I am needing at least 2 quarts of oil. I have had the vehicle examined by midas and they confirmed there are no leaks, cracks or reason for the excessive oil consumption. They suggested that I contact the dealer as this is a known issue and to get help with replacing the engine. I contacted the dealership and was told I would get a call back and never did. I also contacted hyundai on their website and put in a complaint and requested the engine be replaced, with no response from that as well.
Car stuttered and would not rev past 2k rpm. Blinking check engine light appeared Code was for known connecting rod failure for all theta engines for our 2018 sante fe. Hyundai is trying to get out of covering the cost of repair or replacement even though this is a very well known issue and is covered under warranty.
Constantly losing oil and there is NO oil leak. Had numerous Oil Consumption Test done. Paid for other unnecessary testing as well. Thousand of complaints on line of other Santa Fe Sports also having the same issue. Hyundai denied a new engine even though dealership recommended it. Also Hyundai Consumer also denied, since corporate told dealership no. Losing 4 quarts of oil, going less than 1000 miles. Let it sit for over a month, then took it back. Now they said I was 2 quarts over. It has the dealership tamper seals on it. Only dealership has been adding oil. Customer Service representative, accused me of adding oil. I asked how do you think I did that? Your Seals are on my car that your dealership out on there. Said it needed an oil change since it was over. Told him that's fine, but I was not paying for it, since they were the only one who out the oil in. So now I am having to do yet another oil consumption test. This was on 2.3.26
engine consumes excessive amounts of oil. we have to check oil every day and add oil even after 30 mile trips. low oil can result in a seized engine which could result in a crash if power is lost in high traffic areas or highway speeds. hyundai knows there is an issue and engines that seize are replaced with the same defective design. this is dangerous and could result in a crash or being stranded in an unsafe area
My vehicle has approximately 152,000 miles, and I am currently experiencing a major engine failure. Oil consumption and knocking on engine Hyundai has had lawsuits in the past with unsafe unreliable engines.
Engine is burning oil as a default in manufacturing of engine, leaving little to know oil in the engine and causing other malfunctions that use the oil
The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving at 25 MPH and approaching a stop, the vehicle stalled. The battery, check engine, and oil warning lights were illuminated. The contact stated that the failure was related to the federal safety agency Campaign Number: 22V810000 (Service Brakes, Hydraulic). The vehicle was towed to the local dealer, where an unknown diagnosis was provided. The vehicle was not repaired. The warranty claim was denied. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 160,000.
The vehicle developed loud engine knocking and abnormal noise consistent with known Hyundai engine defects. The vehicle is unsafe to operate and has been retained at an authorized Hyundai dealership since October 25, 2025. Hyundai vehicles with similar engine failures have been documented to catch fire, including while parked. Despite the known defect pattern, the manufacturer is refusing warranty coverage, alleging lack of complete oil change records, without providing proof that maintenance caused the failure. This represents a serious safety risk to occupants and the public. My family includes a child with a motor disability, which significantly increases the danger in the event of fire or engine failure.
I have been experiencing issues with oil consumption, having to get oil changes every 2 months and sometimes monthly with no reported leaks from 2 different mechanics. I have been very high maintenance over my oil. While I was driving on the highway, my vehicle began to shake and a knocking sound was heard. I felt the vehicle begin to jerk but no warning lights were on. I was no longer able to drive and had to pull over and wait for a tow to my mechanic's garage. The mechanic let me know there was an issue with the engine, specifically the 3rd cylinder and the piston. It does not put out as much pressure as it is supposed to. I brought the vehicle to the dealership after and they confirmed this was an issue and quoted me $8700 in repairs. There were no warning lights and no engine lights prior to this happening. I was informed by my mechanic that this is a known issue with Hyundai in their 2018 models having failing engines. I purchased the vehicle certified pre-owned with a guarantee from the dealership that I was purchasing a reliable vehicle that should have no issues of this degree.
Engine burns prodigious amounts of oil. Uses one quart in about 400 miles. Hyundai verified this with their 1000 mile oil consumption test. The only reason that this engine did not spin the crankshaft bearings from running dry on oil is because I was so diligent in filling the crankcase. A service writer at Happy Hyundai said that I needed a new long block, but the dealership refused because I had 103,000 miles on the engine. They knew about the problems with oil burning on Theta engines, but were happy to send me on my way knowing that I would be putting oil in my car often. This is not acceptable. Can you help me?
This engine is burning oil. Its mixing oil with gasoline in the cylinders. Its fouling spark plugs and consuming large amounts of oil with absolutely no visible oil leaks. The exhaust is black. PCV valve is clean. Engine is misfiring due to spark plug fouling. New spark plugs and coils. Multiple dealers have stated this is a KNOWN defect with this particular GDI engine but Hyundai refuses to issue a recall.
I recently purchased this used vehicle in June(2025) and after a couple of months of owning the vehicle, I started noticing the car oil level when I checked, started being lower than normal pretty frequently. And it has gotten to the point where I would have to top the oil off every week only after driving a few 100 miles. When I went for my oil change this October, I did informed Hyundai about the issue and they told me to drive the vehicle for 900 miles, do not top it off. And I am following what they're saying, and right now, I just checked my oil, and I have only driven it for 468 miles since I had gotten it changed on October 22nd of this year, and it's showing about a 1/2 quart low at the dipstick already. But if it gets too low before the 900 miles, I would take it to Hyundai so as not to cause any damage to the engine driving it with the oil too low if it gets to that point. The service tech did state that the first step in correcting the issue was to do a combustion flush. And I hope that Hyundai is taking care of the issue for us consumers. I appreciate your prompt response regarding this matter. Thank you. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2018 Hyundai Santa Fe Sport. The contact stated that while driving to the residence at a moderate speed, the oil warning light illuminated on the instrument panel. The following day, the vehicle was taken to an independent mechanic, and the contact was informed that there was no oil in the engine even though an oil change had been performed a month earlier. The vehicle was taken to another independent mechanic, where an oil change was performed. After the oil change, the contact stated there was an abnormal knocking sound coming from the engine while driving at various speeds. The contact then stated that while at a stop light, the engine seized while depressing the accelerator pedal, with several unknown warning lights illuminated on the instrument panel. Due to the failure, the vehicle was towed to the dealer, and the contact was informed that the crankshaft rod was defective. The dealer linked the failure to Hyundai recall 953; however, the contact was later informed that since the vehicle was not serviced for a prior knock sensor recall, the vehicle no longer qualified for the repair. The vehicle was not repaired. The manufacturer was also notified of the failure, and the contact was provided a case number. The contact was later informed by the manufacturer that the vehicle would not be serviced under warranty. The contact stated that the recall was placed on the vehicle prior to owning the vehicle. The failure mileage was approximately 149,000.
VIN decoder
See the problems and recalls for an exact car
Buying a used 2018 Hyundai Santa Fe Sport?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history