Tl* the contact owns a 2009 Hyundai elantra. The contact stated that while driving 35 MPH, the vehicle abnormally accelerated to 60 MPH without warning. The contact had to coast onto the road shoulder and restart the engine to regain normal functions. The failure was recurring. The dealer advised the contact that the failure did not exhibit any warning codes therefore a diagnostic could not be…
2009 Hyundai Elantra cruise control problems
severe 18 complaints filed with NHTSA · avg repair $600 · see cruise control across all vehicles →
Failure mileage
Complaints
18
Recalls
0
Avg fix
$600
6crashes
1injury
When does it fail?
Of the 18 cruise control complaints filed for the 2009 Hyundai Elantra, 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
Among the 19 model years of Hyundai Elantra in our records for cruise control problems, this one ranks #3 by owner-complaint volume.
No new NHTSA cruise control complaint has been filed on this vehicle in over 12 years — the issue may be aging out of the active population.
The failure pattern owners describe
Owners of 2009 Elantra describe sudden, high-RPM acceleration that resists brake input and, in some cases, cannot be stopped until the engine is shut off or the vehicle coasts to rest. The problem takes two main forms: uncontrolled acceleration while cruise control is active and independent surging that occurs without pedal input—particularly during parking or cold start.
Several owners report brake failure concurrent with acceleration: one driver on the interstate could not stop despite slamming the pedal, pulling the emergency brake, and even putting a manual transmission in neutral; another coasted into a ditch after brakes would not respond; a third hit another vehicle at a stop sign. One owner documented a broken plastic engine cover piece jamming the throttle cable. Another owner's mechanic found a throttle body filling with gasoline.
In parking-lot scenarios, vehicles have accelerated into other vehicles, structures, or obstacles without driver input. One case involved airbags failing to deploy; another resulted in a broken knee from the impact. Cold-start sticking of the accelerator pedal is reported multiple times, sometimes resolving as the engine warms.
Dealership attempts to reproduce the failures largely fail, leaving vehicles unrepaired despite police reports and medical injuries in some incidents. One owner reports the dealership returned the vehicle after 100 miles of test driving without identifying or fixing the problem. Diagnosis codes are rare; when repairs occur, they target the accelerator pedal, throttle cable, or throttle body.
Same Hyundai Elantra cruise control reports on nearby years: 2008 · 2010 · 2011 · 2012
Failure modes owners describe
Uncontrolled acceleration with cruise control engaged
Vehicle accelerates on its own while cruise control is active; cruise control will not disengage. Brakes provide minimal response or none at all. Emergency brake offers limited assistance. Disengaging cruise control does not stop acceleration. In one case, putting transmission in neutral failed to stop acceleration.
When: While operating cruise control on highway or interstate driving, 150+ miles of use documented in one case
Symptoms owners cite: Vehicle accelerates despite driver attempting to decelerate or disengage cruise control; Brake pedal response is weak or absent; Emergency brake provides limited stopping force; Vehicle continues to accelerate even after cruise control is turned off; Transmission neutral does not halt acceleration
Recalls/TSBs owners mention: Dealership attempted recreation testing (100 miles) but could not reproduce issue; returned vehicle to owner without repair. Manufacturer stated they would contact owner at later date but did not.
Independent acceleration without driver input
Vehicle suddenly accelerates at various speeds (2–60 mph) without operator depressing accelerator pedal. Occurs both while driving and while stationary. Happens most frequently during parking maneuvers but also during normal driving. Brake and emergency brake response inadequate to stop vehicle in some cases.
When: Low-speed parking situations most common; also reported at 15–60 mph during normal driving. Mileage range 4,700–92,000 miles. One case at 13,135 miles recurring three times in one year.
Symptoms owners cite: Car accelerates to high RPM without driver pressing accelerator; Engine revving with no user input; Vehicle continues to surge when brake pedal is released; Sudden acceleration during parking attempts; Sudden acceleration during low-speed traffic; Multiple occurrences in short timeframes (three times in ten minutes; three times in one year)
Repairs/costs cited: One independent mechanic diagnosed throttle body filling with gasoline, recommending accelerator replacement. Another dealer identified sticking accelerator pedal and springs, replaced both. One owner found broken plastic engine cover jamming throttle cable. One case documented throttle cable binding.
Recalls/TSBs owners mention: Dealership unable to produce warning codes in one case, stating diagnostic could not be performed. No repair completed. Another dealer repaired but provided no investigation confirmation. Manufacturer notified but no follow-up action documented in multiple cases.
Stuck accelerator pedal
Accelerator pedal sticks in down position, either under floor mat or due to mechanical binding. Vehicle cannot be controlled by brake alone. Turning off engine is required to regain control. Issue may be temperature-dependent, occurring primarily on cold start.
When: Cold start (engine warming up phase most problematic). One case on initial startup after 1.5-hour visit. One case at 87,000 miles. One case described as recurring at startup regardless of motion state.
Symptoms owners cite: Accelerator pedal stuck at or near floor; Pedal trapped under floor mat; High engine RPM at startup; Stuck pedal releases partially when tapped but then surges to very high RPM; Pedal becomes unstuck after engine warms; Engine revving with no brake response until vehicle turned off
Repairs/costs cited: One owner observed broken plastic engine cover piece jamming throttle cable; pictures provided to support claim. Accelerator pedal and springs replaced in one case.
Loss of braking and steering control
Brake pedal loses responsiveness or fails entirely during acceleration events. Steering may become difficult or vehicle may lose stability on curves. In one case, ESC (Electronic Stability Control) light illuminated and would not reset; vehicle then experienced loss of braking response on a slight left turn at 40–45 mph, causing 180-degree spin and collision.
When: During sudden acceleration events on highway (35–45 mph documented). One ESC warning occurred after driver noticed loss of control on curve the prior evening.
Symptoms owners cite: Brake pedal does not respond or responds weakly; Stepping on brake causes minimal deceleration; ESC warning light illuminated and will not reset; Vehicle slides or loses traction on curves; Vehicle cannot be controlled during acceleration event; Loss of directional control requiring emergency maneuvers
Codes mentioned: ESC light illumination
Synthesized from 18 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
Tl* the contact owns a 2009 Hyundai elantra. The contact stated that the vehicle independently accelerated several times without warning. In addition, while parked in a driveway, the vehicle surged with a high rate of speed and independently crashed into the driveway. The driver was not injured. The vehicle was towed to a collision center and then towed to the dealer. The dealer diagnosed that…
I was driving home from work on sun night prior to my accident went around a curve and car started loosing control was able to regain control and headed home. Next morning was driving vehicle noticed ESC light was on and would not reset even after shutting car off.driving down another road at approx. 40-45 MPH went to negotiate a slight turn to the left when car started sliding out from under me…
Tl* the contact owns a 2009 Hyundai elantra. The contact stated that while attempting to park, the vehicle accelerated independently causing her to crash into the front of another vehicle. The air bags failed to deploy. A police report was filed. The contact sustained a broken knee that required medical attention. The vehicle was not diagnosed or repaired. The manufacturer was notified of the…
Tl* the contact owns 2009 Hyundai elantra. While driving approximately 15 MPH the contact depressed the brake pedal when the vehicle suddenly accelerated. The contact crashed into the rear of the vehicle in front of her. A police report was filed. The vehicle was towed to the dealer and repaired. After the vehicle was repaired, the failure occurred three times within ten minutes. The contact…
Had cruise control trouble with your 2009 Hyundai Elantra?
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 cruise control problem on the 2009 Hyundai Elantra?
It's a meaningful issue. 18 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $600.
At what mileage does the cruise control typically fail?
Across the 15 complaints that reported odometer mileage, most cruise control failures cluster between 30,000 and 92,000 miles, with the median around 86,000. A quarter of owners report trouble before 30,000; a quarter make it past 92,000. 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 $600 for cruise control 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 cruise control?
No active recalls currently cover cruise control 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/2009/Hyundai/Elantra.
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.