Hyundai has launched an anti-theft software upgrade and window decal campaign (Campaign 993), combined with an anti-theft steering wheel lock campaign (Campaign P32), in response to an increase in thefts of certain 2011-2022MY Hyundai vehicles not equipped with engine immobilizers targeted through social media. For certain vehicles that cannot be updated with the software (Campaign 993), Hyundai is offering customers steering wheel locks at the dealer (Campaign P32). This Dealer Best Practices Guide provides information to assist dealership personnel with customer questions relating to the immobilizer software upgrade, window decals and steering wheel lock ant-theft solutions available from
full bulletin at NHTSA ↗2020 Hyundai Kona powertrain problems
severe Owners of the 2020 Hyundai Kona have filed 17 NHTSA complaints about the powertrain at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Complaints
17
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2018 Kona | 11 |
| 2019 Kona | 17 |
| 2020 Kona (this page) | 17 |
| 2021 Kona | 14 |
| 2022 Kona | 15 |
| 2023 Kona | 10 |
| 2024 Kona | 3 |
1fire
What stands out
Of the 8 model years of Hyundai Kona we track for powertrain problems, this one carries the most owner complaints on file — 17.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Certain vehicles (listed below) equipped with 7-speed Double Clutch Transmissions (DCT) may exhibit abnormal vibration at low speeds. This bulletin outlines the procedures for diagnosing clutch judder, updating the Transmission Control Unit (TCU) with revised logic, and/or replacing the Double Clutch.
full bulletin at NHTSA ↗If you are servicing an applicable vehicle with the following symptoms and DTC, follow the Service Procedure on Page 3. ï· Check Engine light on ï· DTC P0880/P088000 - TCM Power signal error open/short ï· Transmission stuck in 4th gear fail-safe ï· Harsh shift into Drive and Reverse
full bulletin at NHTSA ↗The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
full bulletin at NHTSA ↗If you are servicing an applicable vehicle with a âCheck Engineâ light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of the 2020 Hyundai Kona document a spectrum of powertrain failures, with the dual-clutch transmission (DCT) and engine as primary complaint sources. Most common are DCT issues: disengagement with loud banging during acceleration, stuttering and slipping between 1–2k RPM (one owner measured 85% wear under 20k miles), hard shifting at low speeds, and complete loss of propulsion while driving. Several owners report sudden engine stalling at stops, including one vehicle stalling more than six times in a single day. Engine failures also appear: one owner's engine seized and required replacement, though the dealership disputed recall applicability despite verbal acknowledgment the failed part matched the recall defect.
Dangerous conditions repeat across complaints: vehicle cannot merge onto highway due to hesitation, transmission stuck in 4th gear on freeway with collision-detection system malfunction, and loss of acceleration during traffic turns. Dealership responses are inconsistent. Some acknowledge transmission issues are "known," then refuse repairs citing out-of-warranty status or inability to replicate faults. One transmission was replaced under warranty, failed again within a week, and left sitting for 10 days awaiting diagnosis. Another owner had a transmission replaced after 6–8 months of downtime, only to have the same problem recur.
Owners report dealerships applying software updates without fixing underlying problems, refusing to run full diagnostics despite check-engine lights, and recommending temporary measures (injector cleaner, pulling over during vibration) instead of repairs. One dealership demanded $849 in additional parts as a condition of future warranty coverage and falsely claimed a 2021 recall was completed without documentation.
Same Hyundai Kona powertrain reports on nearby years: 2018 · 2019 · 2021 · 2022 · 2023
Failure modes owners describe
Engine Seizure / Complete Powertrain Failure
Engine failed suddenly without warning lights, requiring complete replacement. Initial dealer diagnosis linked failure to open recall (21V-301), but later claimed it was processed under powertrain warranty only and not tied to the recall. Dealership claimed recall was completed via software update in October 2021 with no proof provided, despite no prior dealership visit since purchase.
When: Not specified in narrative
Symptoms owners cite: Sudden complete loss of power while driving; No warning lights until after failure; Failed part matched recall defect per shop personnel
Repairs/costs cited: Dealership replaced engine; recommended additional bolt and hose replacement at owner expense ($849), claiming these were 'normal wear' items not covered under warranty. Owner was threatened with denial of future coverage if declined.
Recalls/TSBs owners mention: NHTSA Recall 21V-301 and Service Campaign 974 mentioned. Dealership claimed recall was completed via software update October 2021, but no documentation provided. Dealership did not process repair under either recall despite acknowledging match to recall defect.
Dual-Clutch Transmission (DCT) Disengagement with Loud Banging Noise
7-speed DCT randomly disengages from 1st gear or produces loud banging noise during normal acceleration from a stop. Issue more prevalent in warm weather. Dealership cannot duplicate the fault. Owner reports the event feels violent, like a collision, creating safety hazard during traffic merging.
When: Random occurrences, more prevalent in warm weather; vehicle had ~40k miles at time of report
Symptoms owners cite: Violent disengagement of 1st gear clutch; Loud banging noise during acceleration; Car coasts after bang; Violently shakes car; Random, intermittent occurrence
Repairs/costs cited: Dealership could not duplicate fault and has not repaired
Recalls/TSBs owners mention: Hyundai corporate replied owner should work with dealership to resolve; no further action taken
Transmission Failure and Stalling
Vehicle has stalled multiple times, particularly when coming to complete stops (stop signs, red lights). Ignition, speed and driving halts intermittently. Previous repair took 6–8 months to complete; issue recurred in current year (2025). Dealership identified a recall but did not inform owner.
When: Approximately 6–8 months for prior repair; current issue recurrent in 2025. Vehicle paid off in 2024
Symptoms owners cite: Multiple stalls when coming to complete stops; Loss of ignition, speed, and driving; Recurrent failure after prior repair; Stalls twice in one day recently
Repairs/costs cited: Prior repair took 6–8 months at dealership. Owner offered carpets for patience but did not receive them. Current issue unrepaired; owner received notice of recall.
Recalls/TSBs owners mention: Dealership identified recall but did not inform owner proactively. Owner discovered recall after prolonged use period and reports recall exists but unspecified which one.
DCT Failure to Engage and Loss of Propulsion
DCT failed to engage properly during normal driving, causing unexpected loss of propulsion and delayed/no acceleration. Vehicle hesitated when accelerator pressed. In some instances remained in gear but would not accelerate; in others disengaged and re-engaged unpredictably. Dealership acknowledged this is a known issue affecting the transmission.
When: Multiple occurrences during normal driving at ~30 mph while attempting highway merge
Symptoms owners cite: Failure to engage properly; Hesitation and delayed acceleration when accelerator pressed; Sudden loss of propulsion; Transmission disengaged before re-engaging unpredictably; Unable to maintain speed or merge safely
Repairs/costs cited: Dealership inspected and acknowledged issue is clutch-related within DCT and is a known issue. Dealership stated will not repair because vehicle is out of warranty.
Recalls/TSBs owners mention: None documented
Rough Idle, Gear Slipping, and Sluggish/Jerky Acceleration
Rough idle with vibration when stopped. Transmission does not shift properly; gear slipping occurs. Acceleration is sluggish or jerking. RPM behavior erratic (200–300 RPM range), then jerks into 30–40 mph. Problem worsens at stop lights, stop signs, and during turns. No warning lights present. Dealership applied TCM judder improvement update but problem persists.
When: Issue ongoing; dealership visit January 2025; problem continued within 2 months requiring re-diagnosis
Symptoms owners cite: Rough idle with vibration; Gear slipping; Sluggish acceleration; Jerking during acceleration; Erratic RPM behavior (200–300 RPM range); Problem worsens at stops and turns; No warning lights
Repairs/costs cited: Dealership applied TCM judger improvement update for DCT. Service representative advised owner to pull over and turn off car for a few minutes if vibration occurs in stop-and-go traffic.
Recalls/TSBs owners mention: Dealership stated problem is inherent to DCT; unless warning light activates or car breaks down, they cannot do more. No further warranty action indicated.
Metal Grinding Noise, Acceleration Issues, Improper Gear Shifting, Engine Stalling, and Power Loss
Engine produces metal grinding noise (like pieces being ground). Acceleration issues and improper gear shifting; tachometer redlines. Vehicle stalled more than six times at complete stops (stop signs, red lights). After stalling and restarting, loss of power observed. Owner suspects internal engine mechanical issues and transmission problems at 34,705 miles, still under warranty.
When: Issue observed over 2-week period; multiple stalls in one day of driving; ~34,705 miles on odometer
Symptoms owners cite: Metal grinding noise like grinded pieces; Acceleration issues; Improper gear shifting; Tachometer redlines; Multiple stalling (more than six times) at complete stops; Loss of power after stalling and restart; Rough idle
Repairs/costs cited: Owner has video documentation of stalling and rough idle. Vehicle is still under warranty; owner expects resolution.
Recalls/TSBs owners mention: No documented response; vehicle still under warranty
Transmission Failure with Dashboard Warning; Rebuilt Unit Fails Again
Transmission failed while parking; dashboard warning 'transmission problem detected' appeared. Dealership replaced transmission with rebuilt unit under warranty. Vehicle operated for 1 week before similar problem recurred. Second failure: vehicle could not exceed 2–3 mph; second dashboard warning appeared while driving. Vehicle currently sitting in dealer lot for diagnosis after second failure.
When: First failure at unspecified mileage; second failure 1 week after rebuilt unit installation; currently awaiting diagnosis after ~10 days
Symptoms owners cite: Vehicle would not move in reverse; Dashboard warning: 'transmission problem detected'; Second failure: vehicle speed limited to 2–3 mph; Second dashboard warning during driving
Repairs/costs cited: Dealership replaced transmission with rebuilt unit under warranty (approximately 3-week repair time). Second failure unrepaired; vehicle awaiting diagnosis at dealer.
Recalls/TSBs owners mention: No response documented; warranty covered first replacement
Front Axle Transfer Case Seal Leak and Improper Repair
Front axle transfer case seal leaked. Dealership replaced seal but repair was performed incorrectly. Failure recurred during subsequent oil change service. Third inspection confirmed seal was not installed correctly during prior service. Dealership was notified but vehicle was not repaired. Manufacturer was notified.
When: ~146,000 miles
Symptoms owners cite: Leak from front axle transfer case; Seal failure (inoperable seal first, improper installation second)
Repairs/costs cited: Initial seal replacement performed incorrectly. Recurrence discovered during oil change. Second repair not completed.
Recalls/TSBs owners mention: Manufacturer was notified of failure; no further assistance provided. Vehicle not repaired.
Transmission Failure, Stalling, and Fire Hazard
Vehicle stalled while driving; gear shifter became stuck between reverse and drive. Dealership initially claimed vehicle was working as designed. Transmission subsequently diagnosed as needing replacement at another dealership. After transmission replacement, failure recurred. Vehicle failed to start, with abnormal fire odor. At ~13,000 miles.
When: ~13,000 miles
Symptoms owners cite: Vehicle stalling while driving; Gear shifter stuck in reverse and drive; Transmission failure requiring replacement; Failure recurrence after replacement; Vehicle failed to turn on; Abnormal fire odor
Repairs/costs cited: Transmission replaced. Failure recurred after repair; subsequent issue included fire hazard concern. Vehicle failed to start after fire odor incident.
Recalls/TSBs owners mention: Manufacturer notified; no further assistance provided. Owner filed complaint with BBB.
Hard Shifting, Stalling, and Shaking at Low Speeds
Vehicle exhibits hard shifting at low speeds (<10 mph) or when starting from a full stop. At low speeds on inclines, vehicle shakes and stutters on the verge of shutting off. Vehicle experienced full shut-off while stationary in drive gear. Vehicle has ~51k miles and has been maintained per manufacturer schedule.
When: Multiple incidents in August; vehicle at ~51k miles
Symptoms owners cite: Hard shifting at low speeds (<10 mph); Hard shifting when starting from full stop; Shaking and stuttering at low speeds on inclines; Vehicle near shutdown on inclines; Full vehicle shut-off while stationary in drive; Shaking and stuttering before shutdown incident
Repairs/costs cited: Owner reported three instances to local Hyundai dealership; no repair information documented
Recalls/TSBs owners mention: No response documented
Timing System Failure with Stalling; Dealership Refuses Complete Software Update and Diagnostics
Vehicle stalled; timing system was repaired in February 2025. After repair, similar stalling symptoms recurred and check engine light came on. Software update is needed to complete diagnostics and determine if engine replacement is required. Dealership has refused for seven weeks to complete the software update and diagnostic, instead insisting timing system needs replacement without providing diagnostic codes.
When: Timing system repaired February 2025; issue recurred shortly after; still unresolved as of complaint submission (~7 weeks later)
Symptoms owners cite: Vehicle stalling; Check engine light on; Stalling symptoms recur after timing system repair; Deeper issue suspected by owner
Repairs/costs cited: Timing system repaired February 2025. Dealership refuses to complete software update and run diagnostics for 7 weeks. Dealership argues timing system needs replacement instead of running full diagnostic. Diagnostic codes not provided by dealership.
Recalls/TSBs owners mention: No response documented
Collision Detection System Failure and Transmission Stuck in Gear
While on highway, dashboard displayed 'Collision Detection System Failure' message. Brakes slammed on full. Transmission became stuck in 4th gear. Owner had to leave highway and power off engine to reboot vehicle. Event has occurred three times (twice on highway). After incident, owner must manually disable collision detection system at each power cycle, as it resets automatically.
When: Multiple incidents; 3 total occurrences, 2 on highway
Symptoms owners cite: Dashboard message: 'Collision Detection System Failure'; Full brake application; Transmission stuck in 4th gear; Vehicle unresponsive; required engine restart; Collision detection system resets at each power cycle
Repairs/costs cited: Dealer service downloaded logs with no indication of problem. Issue unresolved.
Recalls/TSBs owners mention: No response documented
Transmission Grinding Noise and Loss of Acceleration During Deceleration-Acceleration Cycle
When decelerating to ~5 mph and then accelerating again, transmission produces horrible grinding sound and vehicle loses ability to accelerate. Owner must stop and re-accelerate to regain power. Creates dangerous situation if oncoming traffic present. Dealership will not repair under warranty because they cannot replicate the issue and refuse to inspect.
When: Intermittent, during normal driving
Symptoms owners cite: Horrible grinding sound from transmission; Loss of acceleration ability; Required to stop and re-accelerate to regain power; Creates unsafe situation in traffic
Repairs/costs cited: Owner has 2 separate videos of issue. Dealership refuses to fix under warranty and refuses to inspect vehicle, citing inability to replicate.
Recalls/TSBs owners mention: Dealership warranty denial due to inability to replicate
Engine Sputtering and Stuttering at Stops
When stopped at traffic light and accelerating, engine sputters. Car jolts and does not move; requires second acceleration to move. Issue recurs intermittently. Owner added injector cleaner, which provided temporary relief, but problem recurred. Dealership service suggests injector cleaning.
When: Intermittent at stops; recurring despite injector cleaner treatment
Symptoms owners cite: Engine sputtering at stops; Car jolts and hesitates to move; Repeated acceleration needed to initiate movement; Intermittent recurrence
Repairs/costs cited: Owner treated with injector cleaner; temporary improvement but problem recurred. Dealership suggests injector cleaning.
Recalls/TSBs owners mention: Dealership recommends injector cleaning; no formal repair initiated
DCT Shift Issues Between 1st and 2nd Gear with Stuttering and Acceleration Failure
Vehicle has problems shifting between 1st and 2nd gear. Stutters and has acceleration issues. Problem has nearly caused collision while turning left against traffic. Dealership service reprogrammed clutch touch point engagement but could not replicate issue or find anything wrong. Problem recurred immediately on drive home from dealership.
When: Intermittent; issue persists after dealership reprogramming
Symptoms owners cite: Problems shifting between 1st and 2nd gear; Stuttering during gear transitions; Acceleration issues; Nearly caused collision while turning left
Repairs/costs cited: Dealership reprogrammed clutch touch point engagement for DCT but could not replicate issue or find fault. Problem recurred immediately after.
Recalls/TSBs owners mention: Dealership service unable to resolve; reprogramming did not fix issue
Transmission Slipping Between 1–2k RPM at Low Speeds
Transmission stutters and slips between 1–2k RPM, especially at low speeds and in stop-and-go traffic. At less than 20,000 miles, dealership diagnostic showed transmission wear at 85%, indicating accelerated degradation. Owner is concerned this degradation will continue.
When: Less than 20,000 miles on vehicle
Symptoms owners cite: Transmission stuttering; Transmission slipping between 1–2k RPM; Occurs especially at low speeds; Occurs in stop-and-go traffic; Accelerated wear at low mileage
Repairs/costs cited: Dealership diagnostic at <20k miles revealed 85% transmission wear. No repair action documented.
Recalls/TSBs owners mention: No response documented
Hesitation and Jerking During Acceleration from Stop and from 3rd Gear
Vehicle hesitates and does not accelerate from a complete stop, then jerks and changes into 2nd gear. Same hesitation and lack of power occurs at 3rd gear. Causes near-accident when vehicle would not accelerate as owner pulled into normal traffic.
When: Intermittent during normal driving
Symptoms owners cite: Hesitation at complete stop; No acceleration from complete stop; Jerking into 2nd gear; Hesitation at 3rd gear; Lack of power to accelerate; Safety hazard during traffic merging
Repairs/costs cited: No repair documented
Recalls/TSBs owners mention: No response documented
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Letter below was sent to Hyundai corporate 7 Feb 22. They replied I should work with my Dealership to resolve the issue. Dealership cannot duplicate the fault. Vehicle has 7 speed DCT and currently has about 40k miles. "SUBJECT: 2020 Hyundai Kona DCT disengages and/or makes loud banging noise upon normal acceleration from standing stop. Occurrence is random but more prevalent in warm…
For the last 2 weeks I’ve been hearing weird engine noises. Like metal pieces being grinded. The car has issues accelerating. Will not change gears properly causing the car to redline on the tachometer. Just today I hear noises a lot more frequently and as I’m driving and coming to a slow turn the car stalled out on me. I quickly put the car in park and started the car and it started back up. But…
The timing system was repaired in February 2025. After similar symptoms of vehicle stalling, the check engine light came on Found a software update that needed to be completed to determine if engine needed replaced. Dealership has refused for seven weeks to complete the entire job of the update which includes running a diagnostic of codes. Instead, they have been arguing that the timing system…
Vehicle hesitates and does not accelerate from a complete stop, then jerks and changes into 2nd gear. Same hesitation and lack of power to accelerate occurs at 3rd gear. Causes a near accident when the car would not accelerate as I pulled into normal traffic
Had powertrain trouble with your 2020 Hyundai Kona?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2020 Hyundai Kona?
It's a meaningful issue. 17 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 17 complaints filed, powertrain issues most often appear around 62,667 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2020/Hyundai/Kona.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.