This bulletin provides best practice recommendations when performing brake service procedures.
full bulletin at NHTSA ↗2017 Hyundai Sonata brakes problems
severe Owners of the 2017 Hyundai Sonata have filed 11 NHTSA complaints about the brakes, typically surfacing around 24,000 miles at roughly $450 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See brakes across all vehicles →
Failure mileage
Complaints
11
Recalls
0
Avg fix
$450
| Model year | brakes complaints |
|---|---|
| 2013 Sonata | 71 |
| 2014 Sonata | 30 |
| 2015 Sonata | 31 |
| 2016 Sonata | 29 |
| 2017 Sonata (this page) | 11 |
| 2018 Sonata | 9 |
| 2021 Sonata | 3 |
2crashes
When does it fail?
Of the 11 brakes complaints filed for the 2017 Hyundai Sonata, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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 brakes complaint has been filed on this vehicle in over 6 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 brakes 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 describes the procedure to inspect and identify fluid which may appear around the brake caliper area.
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
Brake issues on the 2017 Sonata cluster around sensor failure, pedal integrity, and fluid management. One owner reported a rear-end collision when brake sensors failed to stop the vehicle despite hard pedal pressure in an emergency. Another owner's brake pedal sank to the floor at 59,500 miles, requiring extended stopping distances and multiple pumps to slow the car—potentially a booster diaphragm issue. A brake sensor failure at 130,000 miles caused unexpected stops and delayed acceleration response; the dealer replaced sensors, but the failure recurred.
Brake fluid depletion is a recurring complaint: one owner refills a full reservoir every month to six weeks after dealership service, suggesting either evaporation or a system integrity problem. A separate report documents unexpectedly hard brake application at 30 mph that threw objects inside the car. ABS engagement in snow extended stopping time to 30–50 seconds with no driver control; the dealer claimed this was designed behavior. A parking brake pedal failure at 21,000 miles resulted from a loose fastener (locknut and washer) on the cable. Engine surge when the brake pedal was pressed at a stoplight caused forward lunge. One owner reported shaking during braking on a downhill stretch.
Dealers have struggled to diagnose and duplicate these failures. Some owners have not pursued repairs due to cost or inconvenience. This is a high-frequency complaint set with safety implications.
Same Hyundai Sonata brakes reports on nearby years: 2014 · 2015 · 2016
Failure modes owners describe
Brake fluid depletion/evaporation
Brake fluid reservoir loses fluid rapidly, requiring complete refills every month to one-and-a-half months after dealership brake work. Owner alleges fluid is evaporating rather than leaking.
When: After dealership brake service at 10,000 miles; reported at unspecified mileage thereafter
Symptoms owners cite: Brake fluid reservoir level drops to empty; Fluid requires full reservoir refills monthly to every six weeks; Fluid appears to evaporate rather than leak visibly
Repairs/costs cited: Owner reports dealership requested $165 to diagnose; no repair completed. Fluid is being added repeatedly but root cause unaddressed.
Brake sensor failure preventing emergency braking
Brake sensors failed to function, preventing vehicle from stopping during an emergency. Owner rear-ended a truck when emergency vehicle activated sirens; owner applied full brake pressure but vehicle continued forward until collision.
When: Purchased February 2017 with 23 miles; recall service supposedly completed before failure; collision mileage not stated
Symptoms owners cite: Vehicle would not stop when brakes applied hard; Vehicle continued forward despite full brake pedal pressure; No automatic emergency braking response
Repairs/costs cited: Dealership service records show recall work completed (alternator screw recall for Santa Fe/Sonata), but sensor failure still occurred.
Recalls/TSBs owners mention: Recall service completed at dealership; owner states recall notice was never received
Brake sensor failure with delayed accelerator response
Brake sensors failed, causing vehicle to stop unexpectedly and later fail to accelerate normally. After dealer replacement, failure recurred.
When: Approximately 130,000 miles
Symptoms owners cite: Vehicle stopped unexpectedly while hybrid function was engaged; Accelerator pedal depressed but vehicle took several minutes to respond; Multiple unknown warning lights illuminated; Vehicle jerked abnormally during acceleration
Repairs/costs cited: Dealer diagnosed brake sensor failure and replaced sensors. Failure recurred after repair.
Recalls/TSBs owners mention: Manufacturer was made aware of recurrence
Brake pedal sinking to floor with extended stopping distance
Brake pedal travel increased and sank to floorboard, requiring longer stopping distances. Owner suspected defective brake booster diaphragm but vehicle was not repaired.
When: 59,500 miles
Symptoms owners cite: Harder to slow or stop the vehicle; Brake pedal sinks to floorboard on several occasions; Extended braking distance required; Brake pedal required pumping multiple times to achieve stopping
Repairs/costs cited: Vehicle was not repaired. Owner researched and suspected brake booster diaphragm defect.
Recalls/TSBs owners mention: Manufacturer was not contacted by owner
Anti-lock brake system extended stopping time in snow
ABS engaged in snow and caused extended stopping times (30–50 seconds) with vehicle pulsation and loss of control. Dealer claimed this was designed behavior; manufacturer declined to assist.
When: 6,000 miles; failure occurred in snowy conditions at speeds above 10 mph
Symptoms owners cite: ABS engaged when driving in snow; Vehicle pulsated during braking; Stopping time extended to 30–50 seconds; No vehicle control during failure
Repairs/costs cited: No repair completed. Dealer stated behavior was designed as specified.
Recalls/TSBs owners mention: Manufacturer declined to assist, citing dealer statement that design was intentional
Unexpected full service brake application
Service brakes independently activated while driving at 30 mph, causing hard impact stop. Owner was unable to duplicate failure; dealer could not diagnose.
When: Approximately 45,000 miles; occurred while driving at 30 mph
Symptoms owners cite: Service brakes independently applied; Hard impact stop; Items inside vehicle were thrown around
Repairs/costs cited: Failure could not be duplicated by dealer; no repair attempted.
Recalls/TSBs owners mention: Manufacturer made aware and case was filed
Parking brake pedal failure due to loose fastener
Parking brake pedal lost function when locknut and washer fell off the threaded cable end at parking brake pedal, allowing pedal to drop to floor.
When: 21,000 miles; owner discovered locknut and washer had fallen off
Symptoms owners cite: Parking brake pedal went to floor with no resistance; Parking brake no longer functional
Repairs/costs cited: Owner self-repaired by installing second M6 nut and locking two nuts together. Owner states this fix should permanently resolve the issue.
Brake pedal application causing engine surge and forward lunge
While stopped at traffic light, brake pedal depression caused RPM to rev up and vehicle to lunge forward unexpectedly. Cause was not determined.
When: 17,000 miles; occurred while stopped at traffic light
Symptoms owners cite: RPM revved up when brake pedal was depressed; Vehicle lunged forward unexpectedly; Occurred while vehicle was at a stop
Repairs/costs cited: Vehicle was not repaired.
Recalls/TSBs owners mention: Manufacturer was not notified by owner; dealership Fuccillo Hyundai was notified but no repair completed
Brake shake/vibration during braking
Vehicle shakes when brakes are applied, reported while driving downhill on the Grapevine.
When: Mileage not stated
Symptoms owners cite: Vehicle shakes when brake pedal is pressed
Complete brake failure in emergency
Brakes failed to operate during long-distance emergency driving situation.
When: Timing and mileage not stated
Symptoms owners cite: Brakes failed to operate in emergency situation
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Tl* the contact owns a 2017 Hyundai sonata. The contact stated that when it snowed, the anti-lock brake system engaged, the vehicle pulsated, and took 30 to 50 seconds to stop. The contact had no control over the vehicle when the failure occurred. The contact stated that the failure occurred while driving more than 10 MPH in the snow. Classic Hyundai (8460 tyler blvd, mentor, oh 44060, (440)…
Had brakes trouble with your 2017 Hyundai Sonata?
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 brakes problem on the 2017 Hyundai Sonata?
It's a meaningful issue. 11 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Across the 8 complaints that reported odometer mileage, most brakes failures cluster between 17,000 and 59,500 miles, with the median around 24,000. A quarter of owners report trouble before 17,000; a quarter make it past 59,500. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $450 for brakes 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 brakes?
No active recalls currently cover brakes 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/Sonata.
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.