Model year guide

2021 Kia niro

Recalls, most-reported problems, crash-test ratings, fuel economy and what a 2021 Kia niro is worth — from official NHTSA and EPA data. 840 on record.

2021 Kia niro — representative photo
Representative photo · via Wikimedia Commons

2021 Kia niro at a glance

Safety recalls1
Owner complaints9
Combined49 mpg
Typical price$31,158

Included: that car's specs and build sheet, model-year recall campaigns and a fair price.

2021 Kia niro recalls 1

Power Train:automatic Transmission:internal:clutches/bands:actuators/solenoids NHTSA Campaign #23V534000 · manufacturer #SC276 · 31/07/2023

Kia America, Inc. (Kia) is recalling certain 2017-2022 Niro and 2018-2022 Niro Plug-in Hybrid vehicles. Fluid may leak into the printed circuit board inside the hydraulic clutch actuator, which can result in an engine compartment fire.

Fix: Dealers will inspect and replace the hydraulic clutch actuator as necessary and install a new fuse, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC276.

Source: U.S. NHTSA, checked 4 Nov 2026. A campaign covers the model year; to see whether a particular car still needs the repair, check its VIN on NHTSA.gov or ask a franchised dealer.

2021 Kia niro common problems

The most-reported problem areas across all 9 owner complaints filed with NHTSA — and what to check before you buy.

Power Train
Drive through every gear: watch for slipping, hard or delayed shifts, and shudder. Check for transmission/driveline leaks and noises.
Engine
Listen for knocks or ticking, check for leaks and blue/white exhaust smoke, and make sure it doesn't overheat. No check-engine light should be on.
Electrical System
Test every electrical feature: windows, locks, infotainment, charging and all lights. Watch for flickering, dead accessories or warning lights.
Vehicle Speed Control
Test cruise control and throttle response, and watch for any hesitation or unintended acceleration.
Visibility
Test wipers, washers, defrosters and all mirrors. Check the windshield for cracks and any camera/sensor for fogging or faults.
Visibility/wiper
Have a trusted mechanic inspect this system as part of a pre-purchase inspection.

2021 Kia niro MPG & running costs

Combined49 mpg
City51 mpg
Highway46 mpg
Est. annual fuel cost$1,350
EPA size classSmall Station Wagons
TransmissionAutomatic (AM-S6)
Engine start-stopYes
Passenger volume101 cu ft
Cargo volume22 cu ft
5-yr fuel cost vs average new car$5,250 less

Source: U.S. EPA / DOE fueleconomy.gov.

What's a 2021 Kia niro worth?

Low
$29,410
Typical price
$31,158
High
$37,190

From 10 comparable 2021 Kia niro listings.

Estimated 5-year cost to own

A rough guide to what running a 2021 Kia niro costs over five years and 75,000 miles.

Fuel (5 yrs)$6,750
Depreciation (5 yrs)$17,950
Total$24,700
Per mile$0.33

How this is estimated: fuel is the U.S. EPA annual cost at 15,000 miles a year. Depreciation compares today's typical asking price for this model year ($31,158) with the same model 4 model-years older ($16,796), from CarLogs listing data. Not included: insurance, maintenance, repairs, taxes, registration and finance costs. Treat it as a comparison guide, not a quote.

Dimensions & weight

Length
171.7 in
Width
70.9 in
Height
60.6 in
Wheelbase
106.3 in
Curb weight
3,166–3,889 lb
Front track
61.8 in
Rear track
62.2 in

Manufacturer-reported figures for the 2021 Kia niro — ranges cover the 3 body / drivetrain versions on record. Source: Transport Canada vehicle specifications via NHTSA.

Investigations & service bulletins

NHTSA defect investigations 1

Pedestrian alert sounds Closed

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that…

NHTSA #DP22005 · Electrical System · opened Jan 2023 · closed Aug 2023

An investigation means NHTSA is examining a possible defect — it is not a recall, and many close without one.

Manufacturer service bulletins 53

Technical notes the manufacturer sent to dealers about known issues and fixes. Useful to mention to a mechanic — they are not recalls and repairs may not be covered. Showing the 10 most recent of 53.

TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - 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…

Bulletin TSB_CLI049_R2 · Electrical System, Visibility/wiper · Aug 2026

TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMS BATTERY DIAGNOSTIC LOGIC IMPROVEMENT (PI2603) - This bulletin provides information regarding a Battery Management System (BMS) software update for certain 2020–2022MY Niro (DE EV) vehicles produced…

Bulletin PI2603_TSB · Electrical System, Fuel/propulsion System · Jun 2026

TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM - This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at upda…

Bulletin TSB_ELE422 · Electrical System · May 2026

TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB p…

Bulletin TSB_ELE417 · Electrical System · Apr 2026

PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating dis…

Bulletin PS797 · Back Over Prevention · Dec 2025

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 relat…

Bulletin TSB_TRA046_R5 · Power Train · Apr 2025

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT MODEM RESET (SA611) - This bulletin outlines the procedure for resetting the modem in certain 2016-2025MY Kia vehicles listed on page 3 that are equipped with Kia Connect Services. The affected vehicles m…

Bulletin TSB_ELE378 · Electrical System · Mar 2025

TECHNICAL SERVICE BULLETIN: DISPLAY AUDIO 2.0V/AVN5W SOFTWARE UPDATE - 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 t…

Bulletin TSB_ELE347_R1 · Electrical System · Dec 2024

TECHNICAL SERVICE BULLETIN: AVN 5.0 WIDE DEALER MODE FACTORY RESET - This bulletin provides the procedure to perform the ‘Dealer Mode Factory Reset’ on multiple 2020-2021MY vehicles (listed on page 5) equipped with AVN 5.0 Wide head units. The affected vehicle…

Bulletin TSB_ELE361 · Electrical System · Dec 2024

TECHNICAL SERVICE BULLETIN: AVN 5.0 WIDE NON-RESPONSIVE RADIO ICON (AM, FM, SXM) - 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 i…

Bulletin TSB_ELE303_R3 · Electrical System · Nov 2024

Source: NHTSA Office of Defects Investigation, listed for the NIRO. Model-year data, not specific to one car.

Canadian recalls 4

Transport Canada recall campaigns for the 2021 Kia niro. Relevant if the car was first sold in, or imported from, Canada.

Visual System

Issue: On certain vehicles, a problem with the rearview camera could cause the rearview camera image not to display. Canadian regulations require the rearview image to display when the vehicle is reversing. Safety Risk: A rearview camera image that doesn't display could reduce a driver's ability to see behind the vehicle while backing up. This could increase the risk of a crash…

Transport Canada #2025345 · Jun 2025

Brakes

Issue: On certain vehicles, water could enter the integrated electronic brake (IEB) and cause it to corrode. If this happens, the IEB motor could fail and cause reduced braking. Note: This service campaign only affects certain Niro EV models. Safety Risk: Reduced braking can cause extended stopping distances and increase the risk of a crash. Corrective Actions: Kia will notify…

Transport Canada #2025003 · Jan 2025

Label

Issue: On certain vehicles, the compliance label may be missing information in French. The words listed on the label for "Tires", "Rims", "Front" and "Rear" appear in English only, when they should be listed as "Tires/Pneus", "Rims/Jantes", "Front/Avant" and "Rear/Arriere". Canadian regulations require this information to be listed on the label in both English and French. Safet…

Transport Canada #2024549 · Aug 2024

Powertrain

Issue: On certain vehicles, fluid could leak onto the printed circuit board for the hydraulic clutch actuator (HCA). If this happens, the circuit board could short circuit. Safety Risk: A short circuit could create the risk of an engine compartment fire while driving. Corrective Actions: Kia will notify owners by mail and advise you to take your vehicle to a dealership to inspe…

Transport Canada #2023423 · Aug 2023

Source: Transport Canada Motor Vehicle Safety Recalls Database.

About the Kia niro

The Kia Niro is a subcompact crossover SUV (B-segment) manufactured by Kia since 2016. It is an electrification-focused vehicle, offering three versions: hybrid, plug-in hybrid and battery electric variants.

From Wikipedia, licensed CC BY-SA 4.0. Describes the model line in general, not this model year specifically.

2021 Kia niro trims & engines on record

Trims
LX, LXS · Touring, Touring Special Edition · EX Premium
Engines
1.6L 4-cyl 104 hp

2021 Kia niro vehicles on record

Other Kia niro model years

2021 Kia niro — frequently asked questions

Does the 2021 Kia niro have any safety recalls?

NHTSA lists 1 recall campaign for the 2021 Kia niro. Whether an individual car still needs a recall repair depends on its VIN — check it on NHTSA.gov or ask a franchised dealer. Recall repairs are done at no charge.

What are the most common problems with the 2021 Kia niro?

Across all 9 owner complaints filed with NHTSA, the most-reported problem areas are power train, engine, electrical system.

What gas mileage does the 2021 Kia niro get?

The 2021 Kia niro has a U.S. EPA estimate of 49 mpg combined (51 city / 46 highway).

How much is a 2021 Kia niro worth?

Comparable 2021 Kia niro listings run roughly $29,410–$37,190, typically around $31,158 (from 10 vehicles).

Sources: NHTSA (recalls, complaints, crash tests), U.S. EPA (fuel economy). Vehicle data only — CarLogs never shows owner information.