TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
full bulletin at NHTSA ↗2023 Kia Niro powertrain problems
moderate Owners of the 2023 Kia Niro have filed 5 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
5
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2021 Niro | 3 |
| 2022 Niro | 4 |
| 2023 Niro (this page) | 5 |
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.
This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: 6-SPEED DCT JUDGEMENT LOGIC IMPROVEMENT / GROUND BOLT TIGHTENING (P074A73) - This bulletin provides information to tighten both the clutch actuator and transmission control unit (TCU) grounding bolts then, upgrade the software logic of the 6-speed dual clutch transmission (DCT) on some 2023MY Niro P/HEV vehicles produced from June 14, 2022 through December 12, 2022, which may exhibit a poor shift quality concern and MIL "ON" with DTC P074A73 stored.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles in the chart starting on page 2.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
My car has clunking noises coming from the front left suspension, they occur more often and getting louder. After doing some research online, I found that the symptoms are similar to the NHTSA recall number 24V-057. Unfortunately, the NHTSA recall didn't include Niro plug-in hybrid manufactured in year 2023, only Niro EV. I took it to the service center nearby. They said it's the strut, so what…
I am experiencing the same issues as the individual who documented incident #11685147. When I turn the shifter to drive and let my foot off the brake, with auto-hold on, the will still roll backwards, even on flat ground, and not respond to me pushing the gas pedal. I have to put the vehicle back into park, and try again. Oftentimes I have to shut the vehicle completely off to be able to get the…
Car makes "clicking noises" when accelerating or braking that appears coming from engine bay or front wheels. Other users reported similar issue on consumer forum: [XXX] ) Car dealership does not have availability to diagnose the issue until next month. Car currently has 55,000 miles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Engine light indicating error code P040100. Dealership noted excessive buildup in emission tube, cooler plugged and needs replaced, EGR valve needs replaced. Car has less than 35k miles.
Had powertrain trouble with your 2023 Kia Niro?
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 2023 Kia Niro?
It's a documented issue but not catastrophic. 5 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
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/2023/Kia/Niro.
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.