2021 Kia Soul
Problems, recalls and owner-reported issues
Engine is the leading concern among 234 owner complaints filed for this model year. This is the 8th highest complaint count among 16 Soul model years with reports.
Of the 2021 reports, 12 involved a crash and 3 involved a fire. 5 people were injured.
What owners report most often
Recalls and investigations
Engine and engine cooling, engine, hard parts internal/mechanicalFeb 17, 2025
Kia America, Inc. (Kia) is recalling certain 2021-2023 Seltos and Soul vehicles. The piston oil rings may have been manufactured incorrectly, which can result in engine damage.
Engine damage can cause a vehicle stall or fire, increasing the risk of a crash or injury.
Dealers will inspect and replace the engine as necessary, free of charge. Dealers will also install piston-ring noise sensing system (PNSS) software, free of charge. Owner notification letters were mailed April 4, 2025. Owners may contact Kia customer service at 800-333-4542. Kia's number for this recall is SC336.
Campaign 25V099000 on NHTSA.gov
EngineApr 13, 2021
Kia Motors America (Kia) is recalling certain 2020-2021 Soul, and 2021 Seltos vehicles equipped with 2.0L Nu MPI engines. The piston oil rings may not have been properly heat-treated, which may result in engine damage.
A damaged engine may stall, increasing the risk of a crash. In addition, oil may leak onto hot exhaust components, increasing the risk of a fire.
Kia will notify owners, and dealers will inspect and, if necessary, replace the engine, free of charge. In addition, Kia will deploy Piston Ring Noise Sensing System (PNSS) software. The recall began June 11, 2021. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC209.
Campaign 21V259000 on NHTSA.gov
Representative owner complaints: fuel/propulsion system
10 reports, newest first. Show all
Engine, Fuel/propulsion system, Apr 20, 2026
What component or system failed or malfunctioned? The engine (piston rings) and catalytic converter failed. The catalytic converter is available for inspection upon request. How was safety put at risk? The engine ran low on oil without any external leak, causing warning lights and engine rattling. Low oil pressure can lead to sudden engine seizure or fire. The failed catalytic converter can clog, causing loss of power on highways and increasing the risk of a crash. Has the problem been confirmed by a dealer or independent shop? Yes. A Kia dealer found the engine 2 quarts low, with no external leak, and recommended replacing the catalytic converter at a cost of over $6,000. An independent mechanic confirmed code P0420, which indicates catalytic converter failure. Has the vehicle been inspected by the manufacturer? The vehicle was inspected by an authorized Kia dealer, but they did not complete the required inspection for Recall SC336 (defective piston oil rings). They did add the software. Were there warning lamps or other symptoms? Yes. The oil pressure warning light and other dashboard lights came on. The engine made a rattling noise. The vehicle later felt sluggish on acceleration, fuel economy dropped, and the exhaust developed a smell. The check engine light came on and later turned off, but code P0420 was stored in the system.
Engine, Fuel/propulsion system, Feb 5, 2026
Owner was driving home at the normal posted speed limit when the car stalled out. The check engine light was on along with the oil Light, the car cranked back up in time before owner was rear ended. No accident occurred but a close call. The vehicle made it about another 1 mile before stalling again this time losing all control in steering as well and was towed home.
Power train, Engine, Fuel/propulsion system, Dec 17, 2025
Contact Information: •Name: [XXX] •Contact: Phone: [XXX] Email: [XXX] •Location: Hawaii Vehicle Information: •Year / Make / Model: 2021 Kia Soul S •VIN: [XXX] •Mileage: 133,000 miles Recall Reference: •Verified NHTSA recall for VIN: [XXX] Kia Consumer Affairs Case Number: XXX ⸻ Complaint Description 1.I received a notification of an NHTSA safety recall for this vehicle. In February 2025, I responded to that notification by contacting Kia. My husband followed up in March 2025 with the dealer, but we did not receive any follow-up regarding inspection or repair. 2.On Tuesday, 12/16/2025, I contacted the dealership again; I was told someone from the service department (believed to be named Colton) would call me back. I have not yet received a callback. 3.Today, I visited the dealer in person. The service department did not document the symptoms reported in my Kia Consumer Affairs case #XXX. 4.The earliest the dealer can see the car is Friday at 9:30 a.m., despite confirming that the car is part of an active safety recall. 5.Current symptoms include: •Engine overheating •Excessive oil consumption (1 quart lost in days) •Check engine light illuminated •Blue smoke from the exhaust •Engine rattling / vibration •A/C inoperable 6.The vehicle is unsafe to drive due to these symptoms. 7.Kia Consumer Affairs, via Gina, stated: •The dealer does not have loaner vehicles available •If I rent a vehicle, Kia will only reimburse $43.19 per day, and I must go through a reimbursement process 8.Given the known safety concerns of the recall and the severity of current symptoms, the dealer must be responsible for providing a safe vehicle immediately while inspection and repairs are addressed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Engine, Fuel/propulsion system, Jun 18, 2025
I took my 2021 Kia Soul to Kia of Leesburg here in Florida, and dropped it off yesterday June 17th, per service department request and was told that they were going try to repair the multiple recalls on this vehicle. They told me that it was going to be 24-48 hours before I was going to be able to get it back when I called, regarding my safety critical recall. So, I dropped it off last night as instructed, the KIA of Leesburg service department called me today stating that due to sludge in the engine, they're refusing to fix the recalls, and stated that I owe them $200 before I am able to pick up my vehicle
Power train, Engine, Fuel/propulsion system, Jun 7, 2025
[XXX], the vehicle was delivered to Crain KIA dealership located in Conway, Arkansas, due to failure of engine to start (engine would turn over but not run). I scheduled a service appointment for May 20th at 0930, for the car to be evaluated/troubleshot. While at the KIA dealership service desk, I discussed KIA SAFETY RECALL SC336, and that my VIN# was effected by the recall (verified by speaking with KIA Customer Care representative) and by using NHTSA's VIN/Recall search engine. At that time, I disclosed that the car was a SALVAGE TITLE vehicle, but was restored, looked nearly brand new and was otherwise operational prior to the engine "no start" condition (4 months of ownership). The service team at the dealership confirmed the SALVAGE TITLE via "Carfax", however they noted that KIA's internal VIN/TITLE database DID NOT REFLECT the car as salvaged. Crain Kia dealership then decided to submit the car for KIA's SAFETY RECALL inspection and possibly warranty work since the vehicle has not exceeded the 5yr/60,000 mile limited basic warranty. Unfortunately, the dealership did not open a "tech-line case' until approximately 15 days later. Tech-line communication between the service technician and KIA's engineering/recall rep, directed the dealership to perform an engine wet/dry compression test (due to deficient piston oil-rings). On June 5th, Crain KIA notified me that the resulting 'LOW" compression test results indicated that the piston rings were faulty, and that the engine would need to be replaced. Additionally, they told me that the vehicle would NOT BE ELIGIBLE for factory warranty due to the SALVAGE TITLE and that I would be responsible for engine change costs. Moreover, the dealership's service team charged me for the cost of the compression testing. I have thoroughly reviewed the KIA recall SC336 documentation as well as NHTSA's 25V-099 bulletin and verified that neither notices proclaim, exclude or deny coverage to salvage title vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Fuel/propulsion system, Oct 22, 2024
My car has never had the gas mileage that is advertised; it’s always been about 3-4 mpg less than the 28 mpg city/31 mpg highway. Recently, I had multiple engine system failures with the plug-in check devices at places like AutoZone saying my ignition coils were misfiring, and after bringing it to the dealership twice for about 1.5 months each time for a total of 3 months, they replaced the fuel injectors and a few other parts the first time before releasing the car to me only to have the same errors come back within 24 hours and I ended up bringing it back only for them to tell me the entire fuel pump system is shot and needed to be completely replaced and all fuel flushed out. Both times I brought it in they claimed it was due to bad gas, but after talking to my insurance, my claim agent concluded it was not bad gas as newer cars like mine have internal sensors that will completely stop the car from driving or even turning on if bad gas is detected to prevent further damage and that’s never been the case for me. I’ve always been able to drive my vehicle and the only noticeable issue would be my fuel mileage. I’ve had the new fuel pump system for about a week now, and my fuel mileage is around 28-29 mpg, more than it’s ever been since I bought the vehicle back in November 2020. I’ve only ever had a max of 26 mpg no matter how or where I drive. I did find recalls on similar makes of cars with the same year as mine from both Kia and Hyundai, and I believe that the Kia Souls around 2020-2021 also have faulty fuel pump systems and should be recalled. I don’t know how many of them are out there, but despite only having 50k miles on my car, the bad gas diagnosis excluded it from the warranty and I had to pay out of pocket the $1,516.83 for the fuel pump system replacement and flushing of the ‘bad gas’ at the Kia dealership.
Power train, Engine, Fuel/propulsion system, Mar 28, 2024
The vehicle experiences a complete loss of power when slowing to a stop before it powers off on its own. The car powers off while going down the road. The car experiences partial loss of power while on cruise control and the car will slow to nearly stopped. The immediate loss of power puts myself and others at risk as the car is now stopping unexpected on the highway. I have left numerous voicemails for service managers at the dealership it was purchased brand-new from 2 years ago. They have not reached out to me. I had an appointment at their dealership to have the car inspected to see if this was covered with my warranty and they explained my warranty was only 60k miles and my car is now at 65k miles. The car was shutting off and having power loss a week before the first indicator light came on, which was the engine light. The code pulled for that sensor was the P0171 sensor which measures air in the fuel system and it stated "bank 1 running lean". I have now taken the car to a local shop and they are advising there was no oil in the car and there are metal shards in the valves in the engine. Werner KIA is the only shop that has ever worked on my car or changed the oil and they have not advised me of any oil leaks at all.
Other or unspecified, Engine, Fuel/propulsion system, Mar 21, 2022
I am very concern with the 2021 KIA Soul that I drive presently. The vehicle is in my son’s name; however, I pay the monthly payments and I am the primary driver for this automobile; this is also listed on my insurance policy as well. I have been experiencing some dangerous mechanical conditions with the car. Please find a copy of my uploaded document summary. I have an appointment tomorrow, Tuesday, on March 22, 2022.
Other or unspecified, Engine, Fuel/propulsion system, Mar 5, 2021
TWO MAJOR ISSUES. I HAVE HEARD A VERY LOUD TICKING SOUND COMING FROM THE ENGINE WHICH STARTED ABOUT THREE DAYS AGO. BEFORE THEN THE CAR RAN SILENT. CAR IS IT APPROXIMATELY 8000 MILES ON THE ODOMETER. THE CLICKING STARTED GETTING LOUDER AND THEN THE CAR STALLED TWICE RIGHT IN THE MIDDLE OF DRIVING! ONE WAS ON A STREET GOING ABOUT 45 MILES AN HOUR! THE OTHERWAS ON A SIDE STREET GOING APPROXIMATELY 25 MILES AN HOUR. THE EC OH MODE WAS ON IN THE CAR. ALSO' WHEN YOU TURN ON THE HEATER FAN ON HIGH IT STARTED MAKING A HIGH-PITCHED SQUEALING SOUND. THE CAR IS AT THE DEALERSHIP RIGHT NOW AS IT WILL NOT WORK PROPERLY.
Service brakes, Fuel/propulsion system, Jan 11, 2021, crash
I WAS GOING TO GET MY MAIL ATTEMPTING TO PARK WHERE I ALWAYS PARK. I HIT THE BRAKE AND THE CAR SPED UP AND HIT TWO MAILBOXES. I COULDN'T GET IT TO STOP. I DO NOT KNOW HOW FAST IT WAS GOING WHEN I HIT THE MAILBOXES