2021 Kia Soul Recalls, Problems & Maintenance

The 2021 Kia Soul carries 2 open NHTSA recalls — most recently covering engine and hard parts internal/mechanical. Owners report 7 recurring issue clusters, led by “Excessive oil consumption from defective piston rings.” Kia uses Hyundai Motor Group's powertrains, so service intervals mirror Hyundai's. Kia Promise covers the first 3 years / 36,000 miles of complimentary maintenance. Kia owners with the Theta II 2.0L/2.4L (Optima, Sorento, Sportage 2011-2019) should adhere strictly to oil intervals due to known oil-consumption issues in Kia TSBs.

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2 Open Recalls

Source: NHTSA

ENGINE

Campaign #21V259000 · Apr 13, 2021

Issue: 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.

Risk: 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.

Fix: 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.

ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

Campaign #25V099000 · Feb 17, 2025

Issue: 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.

Risk: Engine damage can cause a vehicle stall or fire, increasing the risk of a crash or injury.

Fix: 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.

Recall data refreshed Sep 20, 2026.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2021 Kia Soul.

Reported to NHTSA

Excessive oil consumption from defective piston rings

ENGINE

26 NHTSA complaints · 2022-10 → 2026-07

“the engine is consuming a quart of oil per thousand miles”
— Owner report, NHTSA ODI #11731690
“The contact owns a 2021 Kia Soul. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact stated that the vehicle consumes one quart of engine oil every 1,000 miles. There were no warning lights illuminated”
— Owner report, NHTSA ODI #11687991
“On 01/12/2026, I had my 2021 Kia Soul (VIN: [XXX] ) inspected by a technician at J&K Automotive after discovering a significant drop in oil. The technician found the engine oil dipstick completely dry”
— Owner report, NHTSA ODI #11710738

Read all complaints on NHTSA →

Electric power steering and lane-keep malfunction

STEERING

3 NHTSA complaints · 2023-10 → 2025-05

“The contact owns a 2021 Kia Soul. The contact stated that while turning the ignition on and off, there was a knocking sound coming from the dashboard. After pulling into a parking lot, a red exclamation point illuminated the instrument panel, and the steering wheel seized”
— Owner report, NHTSA ODI #11644815
“I purchased vehicle in Nov 2025 from Autonation. It drove well for awhile, but once I drove steadily for several miles, the steering wheel started drifting back and forth, rather like it was driving itself”
— Owner report, NHTSA ODI #11661370
“First off I do not use my lane keep assist. When traveling at any speed on a long curves of 100 to 150 ft or longer or sitting in a parking lot with the steering wheel angled between 15 to 30 degrees either left or right of center for 15 to 30 seconds the system will”
— Owner report, NHTSA ODI #11552757

Read all complaints on NHTSA →

Roof paint delamination and peeling

STRUCTURE, UNKNOWN OR OTHER

3 NHTSA complaints · 2025-10 → 2026-04

“Manufacturer defect: Massive paint delamination/adhesion failure on the roof. Large sheets of paint are flaking off while the vehicle is in motion, creating a debris hazard for following drivers and distracting the operator”
— Owner report, NHTSA ODI #11730709
“Paint chipping and peeling in several places”
— Owner report, NHTSA ODI #11708427
“Paint is peeling on the roof of my 2021 Kia Soul - for no reason. I have read that other KIA owners have this problem and Kia is not taking responsibility for this”
— Owner report, NHTSA ODI #11696108

Read all complaints on NHTSA →

Engine stalling and loss of motive power while driving

ENGINE AND ENGINE COOLING

91 NHTSA complaints · 2022-10 → 2026-08

“The contact owns a 2021 Kia Soul. The contact stated that while driving at an undisclosed speed, the vehicle stalled. The check engine and engine oil warning lights were illuminated. The contact added engine oil to the engine and restarted the vehicle, but the failure persisted”
— Owner report, NHTSA ODI #11755927
“The contact owns a 2021 Kia Soul. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated, and the engine seized. The contact stated that nearby drivers assisted with pushing the vehicle to the shoulder of the roadway”
— Owner report, NHTSA ODI #11719469
“While driving, the vehicle began running rough and stalled shortly after. It would not restart. The vehicle was towed to a dealership, where they diagnosed “excessive cylinder wall scoring” and no engine compression”
— Owner report, NHTSA ODI #11675343

Read all complaints on NHTSA →

Piston ring recall repair denied, delayed, or disputed

ENGINE

28 NHTSA complaints · 2025-03 → 2026-08

“My Kia Soul had a recall for the Pistons to be replaced due to faulty pistons. Now they are saying my engine is needing replacement, even with regular scheduled oil changes being done. They said the top was full of sludge”
— Owner report, NHTSA ODI #11713149
“Description of Problem: My 2021 Kia Soul experienced complete engine failure consistent with the defect described in Recall 25V099 (SC336), which addresses faulty piston oil rings that can cause engine damage, stalling, and potential fire risk”
— Owner report, NHTSA ODI #11695658
“2021 Kia Soul | VIN: [XXX] | Recall SC336 (NHTSA 25V099) | Kia America Case No. XXX DEALER: Team Kia of El Cajon, 541 N. Johnson Ave, El Cajon, CA 92020 SYMPTOMS: Rapid oil consumption, abnormal engine noise, overheating, vehicle stalling at complete stops, difficulty restarting”
— Owner report, NHTSA ODI #11740662

Read all complaints on NHTSA →

Transmission failure with loss of propulsion

POWER TRAIN

13 NHTSA complaints · 2023-02 → 2026-06

“I was on the freeway, and the car was shuddering a bit before I lost the ability to accelerate. It would rev but no power to the wheels. Had to pull over and get towed to the dealer. I think it may be a transmission failure”
— Owner report, NHTSA ODI #11525648
“A few days later on my way to work. I entered the highway the car was running fine at 70mph then all of a sudden it lost power.. No power in the middle of the busy Atlanta Highway!! I was able to coast onto the shoulder. At that point I turned the car off”
— Owner report, NHTSA ODI #11570756
“The transmission on the vehicle has gone bad twice since we purchased it used. The car has 34,400 miles on it. The problem puts the driver in an unsafe situation as the problem causes the car to lose power while at high speeds”
— Owner report, NHTSA ODI #11716734

Read all complaints on NHTSA →

Brake and forward-collision-avoidance failure to stop

SERVICE BRAKES, FORWARD COLLISION AVOIDANCE

8 NHTSA complaints · 2023-01 → 2026-03

“Driving, slowing down for a stop light. Put the brakes on, they did not work. Push the all the way to the floor. Hit the vehicle in front of me. Luckily going slow between lights”
— Owner report, NHTSA ODI #11663556
“Description of Incident: On February 9, 2026, at approximately 3:00 PM, I was driving my 2021 Kia Soul on Calvine Road and Winterberry in Elk Grove, CA. A vehicle suddenly merged into my path”
— Owner report, NHTSA ODI #11717950
“I immediately attempted to apply the brakes, but the pedal failed to depress or engage normally. Despite the imminent collision, the Forward Collision-Avoidance Assist (FCA) failed to provide any alert, and the Automatic Emergency Braking (AEB) system did not activate”
— Owner report, NHTSA ODI #11718935

Read all complaints on NHTSA →

Note: NHTSA also opened 1 defect investigation(s) on this vehicle that closed without action.

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil & Filter

Every 3,750 mi

Severe service: every 3,750 miles. Normal: 7,500 miles. Theta II 2.0L/2.4L on Optima, Sorento, Sportage (2011-2019): full synthetic only, never extend.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Tire Rotation

Every 7,500 mi

Rotate tires every 7,500 miles. Telluride and Sorento AWD owners benefit from rotation every 5,000 miles to prevent uneven wear.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 7,500 mi

Inspect brake pads and rotors every 7,500 miles. Forte and Soul front pads typically last 40,000-55,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 30,000 mi

Replace DOT 3 brake fluid every 30,000 miles or 24 months. Required for ABS and ESC pump longevity.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Engine Air Filter

Every 30,000 mi

Replace engine air filter every 30,000 miles. Severe or dusty conditions: 15,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Automatic Transmission Fluid

Every 30,000 mi

Severe service: every 30,000 miles. Normal: 60,000 miles. Use Kia SP-IV — same as Hyundai.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Spark Plugs

Every 105,000 mi

Iridium-tipped plugs rated 105,000 miles on most Kia engines. 1.6T (Forte GT, Soul Turbo): 60,000 miles. 3.5L Lambda II V6 (Telluride, Sorento): 105,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Long-Life Coolant

Every 30,000 mi

Kia Long-Life Coolant (pink, same as Hyundai): first change at 60,000 miles, then every 30,000. Do not mix with green or orange coolant.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Transfer Case / Rear Diff (AWD)

Every 60,000 mi

On AWD models, replace transfer case fluid and rear differential fluid every 60,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$105–$140

Shop

~$75–$100

DIY

~$15–$40

AWD/4WD vehicles only. Easy drain-and-fill on most platforms.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Cabin Air Filter

Every 15,000 mi

Replace cabin air filter every 15,000 miles. Located behind the glove box on Optima, Forte, and Sportage; behind the dashboard panel on Telluride.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

35 crashes 1990–2024

How the 35 occupant deaths break down

28

driver deaths

7

passenger deaths

35

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2021 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

12

complaints mentioning a crash

3

complaints mentioning a fire

Reviewed known issues for this vehicle·Open recalls for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2021 Kia Soul reflects Kia's published service intervals and the Service Reminder system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.