Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this condition. All internal combustion engines consume some engine oil during normal operation, depending on driving conditions and mileage, and this procedure should only be performed when deemed necessary based on inspection and diagnosis of the vehicle as outlined in TSB 26-EM-015H, Engine Oil Consumption – Inspection & Repair Guidelines, or the latest revision.
full bulletin at NHTSA ↗2021 Hyundai Accent engine problems
severe Owners of the 2021 Hyundai Accent have filed 3 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of October 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
3
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2017 Accent | 15 |
| 2018 Accent | 7 |
| 2019 Accent | 18 |
| 2021 Accent (this page) | 3 |
1fire
What stands out
Engine accounts for 19% of all owner complaints filed against this vehicle, across 3 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine 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 equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin provides the inspection and repair procedures for vehicles exhibiting this condition. All internal combustion engines consume engine oil as part of normal engine operation. Oil consumption rates may vary based on mileage, operating conditions, driving habits, and maintenance history. Hyundai recommends following the prescribed maintenance schedule and periodically checking the engine oil level using the dipstick to maintain proper engine oil level.
full bulletin at NHTSA ↗This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
full bulletin at NHTSA ↗This bulletin provides information related to the ECU software upgrade for improvement of ECU Mileage calculation internal error (OBD Compliance).
full bulletin at NHTSA ↗Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or sub-assembly replacement.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 3 most recent
The contact leased a 2021 Hyundai Accent through Enterprise Rent-A-Car. The contact stated that while driving 50 MPH, the vehicle lost motive power for about 5 seconds while accelerating and decelerating through traffic. The contact stated that he was able to duplicate the failure five times and related the failure to the engine; however, the vehicle was not diagnosed or repaired by an…
The contact owns a 2021 Hyundai Accent. The contact stated that while driving on the highway at 40 MPH, the vehicle lost automotive power. There was no warning light illuminated. The vehicle was taken to a local dealer where the vehicle was diagnosed; however, the contact was informed there was no fault found with the vehicle. The vehicle was not repaired. The manufacturer was notified of the…
Engine compartment fire. Vehicle towed to Hyundai dealer in Bremerton wa
Had engine trouble with your 2021 Hyundai Accent?
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 engine problem on the 2021 Hyundai Accent?
It's a meaningful issue. 3 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2021/Hyundai/Accent.
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.