This TSB references the Op codes to use for claim submission and the Parts required based on the vehicle’s inspection results from TSB 22-01-023H (DTC P1326 – Engine Bearing Inspection/Engine Replacement) or the latest version.
full bulletin at NHTSA ↗2017 Hyundai Elantra GT engine problems
moderate 15 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
15
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 15 engine complaints filed for the 2017 Hyundai Elantra GT, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA engine complaint has been filed on this vehicle in over 4 years — the issue may be aging out of the active population.
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.
This TSB references the Op codes to use for claim submission and the Parts required based on the vehicle’s inspection results from TSB 22-01-023H-2 (DTC P1326 – Engine Bearing Inspection/Engine Replacement) or the latest version.
full bulletin at NHTSA ↗Hyundai is conducting a campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp (MIL) will blink continuously, and the vehicle will be placed in Engine Protection Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Engine Protection Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800-2000 RPM.
full bulletin at NHTSA ↗This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
full bulletin at NHTSA ↗A class action lawsuit against Hyundai Motor America (âHMAâ) alleges that certain Hyundai vehicles (âClass Vehiclesâ) were manufactured, marketed, sold, and/or leased with an engine defect that can result in sudden engine seizure, stalling, engine failure, and in some circumstances, engine fire, and that some owners and lessees of Class Vehicles have been improperly denied repairs under warranty. Neither HMA nor Hyundai Motor Company have been found liable for any of the claims alleged in the lawsuit. The parties have instead reached a voluntary settlement (the âSettlementâ) to avoid lengthy litigation and to provide owners of Class Vehicles certain benefits.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Fourteen owners of 2017 Hyundai Elantra GT vehicles report engine failures characterized by abnormal knocking noise followed by sudden loss of power at highway speeds, typically between 60,000 and 108,000 miles. Failures occur without warning lights or only late-stage illumination. Dealership diagnostics cite rod bearing failure, piston damage, failed oil pumps, and sludge buildup—yet owners provide oil-change receipts and regular maintenance records, suggesting manufacturing defect rather than neglect.
One critical issue: Hyundai's Knock Sensor Detection System (KSDS) update, installed post-purchase to prevent bearing failure, reportedly triggers severe limp mode and acceleration loss instead. Hyundai acknowledges a Theta II extended warranty but conditions approval on unrelated repairs like $3,300 catalytic converter replacement. A California BAR inspector confirmed the update causes the drivability problem, not the catalytic converter.
Warranty denial is consistent. Owners over 60,000 miles are refused coverage despite recalls covering nearly identical 2011–2016 Elantra engines. One owner 1,000 miles over warranty was denied bearing-failure repair. Supply constraints are real: dealerships report replacement short blocks sitting idle for months waiting on parts. Owners also report that Hyundai refuses to provide loaner vehicles, only reimbursing $30/day rental—far below actual rental costs.
Same Hyundai Elantra GT engine reports on nearby years: 2018
Failure modes owners describe
Engine seizure with bearing failure
Engine seized without warning during highway driving. Owners report loud knocking noise preceding complete loss of power and inability to restart. Diagnoses cite rod bearings, failed pistons, and sludge buildup; oil analysis shows either low oil levels with sludge or burning excessive oil despite regular maintenance.
When: 60,000–108,000 miles
Symptoms owners cite: Abnormal knocking or mechanical noise from engine; Loss of engine power while driving; Severe knocking and shaking after initial noise; Engine won't restart after stalling; Complete engine shutdown; Sludge visible in oil fill area; Engine light illuminated (inconsistently)
Codes mentioned: P0301 (misfire on cylinder 3 reported in one case)
Repairs/costs cited: Engine replacement quoted at $10,000; dealers cite rod bearing failure, failed pistons, oil pump failure. Some owners over warranty (60k+) denied warranty coverage. Replacement engines described as backordered for months.
Recalls/TSBs owners mention: Hyundai extended warranty program for Theta II engines with Knock Sensor Detection System (KSDS) update, but owners report company conditioning approval on unrelated catalytic converter replacement ($3,300 cited). KSDS update itself reported to trigger limp mode. Some owners reference October 2020 Hyundai settlement for motor seizure without admission of fault; 2011–2016 Elantra models have recalls, but 2017 GT not included despite identical engine.
Oil starvation and sludge accumulation
Engine develops severe sludge buildup despite regular owner maintenance and oil changes. Low oil levels detected without illumination of warning lights. One owner replaced catalytic converter twice in 7 months before engine seized, suggesting possible manufacturing defect in oil management or PCV system.
When: Variable; one case after 7 months of ownership with two catalytic converter replacements
Symptoms owners cite: Sludge visible at oil fill cap; Very low oil level without warning light; Knocking noise from engine; Power loss during acceleration
Repairs/costs cited: Dealership diagnosed sludge buildup but refused repair, claiming it is owner-caused despite documented regular maintenance. One owner cited manufacturing defect; another had catalytic converter replaced twice without resolving underlying issue.
Recalls/TSBs owners mention: Dealers blame sludge on owner maintenance while refusing warranty work. Hyundai corporate resists coverage pending other repairs unrelated to sludge problem.
Post-KSDS update limp mode and drivability loss
After dealership installation of Knock Sensor Detection System (KSDS) update—intended to prevent bearing failure and fire—vehicle stuck in limp mode with severe acceleration loss. California BAR inspector agreed update caused limp mode, not catalytic converter issue, but unable to assist.
When: Immediately post-update installation
Symptoms owners cite: Vehicle stuck in limp mode; Extremely slow acceleration from stops; Engine cuts out if accelerator pressed too hard; No warning lights correlating with limp mode state
Repairs/costs cited: Dealership blamed catalytic converter; owner faced $3,300 replacement cost as precondition for warranty review. California BAR associate confirmed update root cause but provided no resolution.
Recalls/TSBs owners mention: Hyundai acknowledged Theta II extended warranty eligibility but made catalytic converter replacement ($3,300) a condition of further investigation, despite independent assessment that update caused the fault.
Piston and internal engine damage
Internal engine components, particularly pistons, failed catastrophically. One case involved third cylinder piston disintegration; another reported all four pistons damaged with spark plug gap closed by internal debris.
When: 61,000–67,000 miles
Symptoms owners cite: Loud mechanical noise preceding failure; Complete engine shutdown; Spark plug gap closed by internal debris; Misfires on individual cylinders
Codes mentioned: P0301 (cylinder 3 misfire)
Repairs/costs cited: Dealership quoted full engine replacement; internal inspection revealed catastrophic piston damage and excessive oil burning.
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 14 most recent
The contact owns a 2017 Hyundai Elantra GT. The contact stated while her husband was driving 50 MPH, he lifted his foot off the accelerator pedal and started to hear an abnormal sound. The contact stated no warning light was illuminated. The driver was able to drive to his employer's parking lot. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the engine to…
3rd cylinder piston fell apart inside is motor . Car only has 61,000 miles. Vehicle was on highway
driving down highway 50MPH, car completely lost power. Could have run off road due to loss of power steering, could have been hit, Got looked at by Ruddell dealership in port angeles wa where it was purchased, has a seized motor, not due to lack of oil. based upon research on the internet, this is a common issue at around 60-80K miles with this year make model. especially considering the fact…
At 77,000 miles while driving, dashboard lights came on. Engine shut off, loud noise came from engine, obvious engine failure not sure if from fuel pump. Car had regular service maintenance. Not under Hyundai 100k warranty since I am the second owner. Ceased engine related to oil - most likely failed oil pump.
I am the second owner of a 2017 Hyundai Elantra GT hatchback. I have not had any issues with the car until last week. I was driving in town to pick something up and the engine started knocking and losing power. The rpms would go up but I could not go anywhere. Eventually I had to park the car and have it towed to my house. I checked the oil and it was very low and had sludge in the upper engine…
I was driving down the freeway and moved over to pass a slower vehicle when the engine lost acceleration. I pulled over to the side oft the road and had the vehicle towed to the nearest garage. They told me the engine lost all its oil and the engine needed to be replaced. I find this hard to believe in a 4 year old car. I am bringing it to dealership tomorrow to see if they have the same…
I bought it new in 2017 and paid it off a year early in May 2021. I have about 90,000 miles on it. When I was driving to a client's house on Friday, 16 July 2021, I was on the highway. It was making a lot of noise and would not accelerate. Eventually, the car completely died, would not start, did not have any dash lights, nothing. Totally dead. I was stranded on the side of the road for…
Tl* the contact owns a 2017 Hyundai elantra gt. The contact stated that while driving at 65 MPH, there was an abnormal noise coming from the engine. The contact pulled to the shoulder of the roadway and had the vehicle towed to viles automotive group (905 callahan dr, knoxville, tn 37912) to be diagnosed. The contact was informed that the engine needed to be replaced. The vehicle was not…
I was driving on the freeway and started hearing some knocking noise coming out from the engine , I decided to go home and as I was getting close to my house , the engine seized and the car won’t start. I towed it to the Hyundai dealership and they quoted me 10.000$ for a new engine and they wouldn’t tell the main reason to why my engine died. They only said to me that all four pistons are bad…
I have a 2017 Hyundai Elantra gt that currently has 108,000 miles and I already replaced the catalytic converter twice within 7 months. Last month, as I was driving on the freeway going home, I started hearing some knocking noise coming out of the engine. I decided to go to my house since I was close by. The noise was getting louder and louder, then as I was going down the hill on my way home,…
Had engine trouble with your 2017 Hyundai Elantra GT?
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 2017 Hyundai Elantra GT?
It's a documented issue but not catastrophic. 15 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 15 complaints filed, engine issues most often appear around 80,216 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 $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/2017/Hyundai/Elantra GT.
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.