2017 Hyundai Elantra
Problems, recalls and owner-reported issues
Engine is the leading concern among 767 owner complaints filed for this model year. This is the 2nd highest complaint count among 26 Elantra model years with reports.
Of the 2017 reports, 37 involved a crash and 6 involved a fire. 24 people were injured.
What owners report most often
Recalls and investigations
Steering, electric power assist systemMar 28, 2017
Hyundai Motor America (Hyundai) is recalling certain 2017 Elantra vehicles. The affected vehicles may have a damaged Electronic Power Steering (MDPS) connector resulting in a loss of electric power steering assistance.
Loss of power steering assist would require higher steering effort, especially at lower speeds, which may increase the risk of a crash.
Hyundai will notify owners, and dealers will replace the EPS motor, free of charge. The recall is expected to begin April 28, 2017. Owners may contact Hyundai customer service at 1-800-243-7766. Hyundai's number for this recall 161.
Campaign 17V213000 on NHTSA.gov
Service brakes, hydraulic, power assist, hydraulicJan 26, 2017
Hyundai Motor Company (Hyundai) is recalling certain 2017 Elantra vehicles. In the affected vehicles, the brake booster may fail, resulting in a loss of power brake assist.
A loss of power brake assist can lengthen the distance needed to stop the vehicle, increasing the risk of a crash.
Hyundai has notified owners, and dealers will replace the brake system booster assembly, free of charge. The recall began on February 6, 2017. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 157.
Campaign 17V063000 on NHTSA.gov
Air bags, frontal, driver side, inflator moduleDec 30, 2016
Hyundai Motor Company (Hyundai) is recalling certain model year 2017 Hyundai Elantra vehicles manufactured April 15, 2016, to September 13, 2016, and Sonata vehicles manufactured May 27, 2016 to September 16, 2016. In these vehicles, the end seal for the driver's frontal air bag inflator may not have been properly installed, possibly resulting in reduced inflation of the frontal air bag in the event of a crash.
In the event of a crash, an air bag that does not inflate fully increases the risk of injury.
Hyundai will notify owners, and dealers will replace the driver's frontal air bag module, free of charge. The recall began February 13, 2017. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 156.
Campaign 16V956000 on NHTSA.gov
Air bags, frontalApr 21, 2016
Hyundai Motor Company (Hyundai) is recalling certain model year 2015-2016 Sonata vehicles manufactured May 29, 2014 to February 11, 2016, 2017 Elantra vehicles manufactured January 12, 2016 to February 22, 2016, and one 2016 Sonata Hybrid vehicle manufactured October 15, 2015. In these vehicles, the driver's frontal air bag may be missing a chemical enhancer required for the second stage air bag deployment, resulting in the second stage not deploying in certain crashes. The primary stage will deploy as intended.
An air bag that does not inflate increases the risk of injury.
Hyundai will notify owners, and dealers will replace the driver's frontal air bag module, free of charge. The recall began on May 5,2016. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 144.
Campaign 16V232000 on NHTSA.gov
Representative owner complaints: service brakes
47 reports, newest first. Show all
Service brakes, Engine, Jun 20, 2019
SINCE I HAVE HAD THE CAR FROM 2017 TO NOW, THERE HAS ALWAYS BEEN AN ISSUE WITH THE ENGINE. THE CAR WILL SHAKE AND THEN SLOW FOR A FEW SECONDS AND THE ENGINE LIGHT WILL POP ON. THE BREAKS ARE SOMETIMES VERY HARD. I SOMETIMES HAVE TO PUSH HARDER ON THEM, BUT THEN THEY MAKE A WEIRD NOISE. IT IS QUITE SCARY.
Electrical system, Service brakes, Engine, Mar 5, 2019
MY CAR HAVE PROBLEM WITH ELECTRIC SYSTEM THE BRAKE LIGHT FAIL EVERY 2 WEEKS. WHEN CHANGE THE SHIFT TO DRIVE TO REVERSE LOSS THE REVERSE
Structure, Service brakes, Oct 15, 2018, crash
I WAS DRIVING A SAFE DISTANCE BEHIND A CAR THAT CAME TO A SUDDEN STOP IN FRONT ON ME. THE CAR THAT STOPPED IN FRONT ON HER WAS AN OLDER MODEL EXPLORER 4 DR. THERE WAS ALSO A AT THAT SUDDENLY STOPPED IN FRONT OF THE EXPLORER . AS I APPLIED MY BRAKES IT WAS AS IF THE CAR WOULDN'T STOP. I'M NOT SUE IF THE CAR IN FRONT OF ME BRAKE LIGHTS WERE WORKING BECAUSE I CAN'T SEE HOW I HIT THE CAR FROM BEHIND ! MY CAR WAS TOTALED AND MY INSURANCE COMPANY DROPPED ME FOR THE ACCIDENT ! I WAS ON A CITY STREET.
Service brakes, Jul 11, 2018, crash
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. WHILE DRIVING 45 MPH, THE PRECEDING VEHICLE ABRUPTLY STOPPED. THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE VEHICLE FAILED TO IMMEDIATELY STOP. AS A RESULT, THE CONTACT REAR ENDED THE PRECEDING VEHICLE. THE DRIVER'S SIDE AIR BAG DEPLOYED. THE CONTACT SUSTAINED A WHIPLASH THAT REQUIRED MEDICAL ATTENTIONS. THE DRIVER OF THE OTHER VEHICLE WAS TRANSPORTED TO THE HOSPITAL BY AMBULANCE. THE CONTACT STATED THAT THERE WERE TWO OTHER PASSENGERS IN THE OTHER VEHICLE, BUT HE WAS UNAWARE OF THEIR INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A TOW YARD. THE DEALER (LEE HYUNDAI, 1960 SKIBO RD, FAYETTEVILLE, NC 28314, (910) 864-7100) WAS CONTACTED, BUT WAS WAITING FOR INVESTIGATION RESULTS FROM THE MANUFACTURER. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 20,000.
Service brakes, Jun 6, 2018, crash
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. WHILE DRIVING APPROXIMATELY 5 MPH, THE PRECEDING VEHICLE SLOWED DOWN ABRUPTLY AND CAUSED THE CONTACT TO SLAM ON THE BRAKE PEDAL. THE CONTACT STATED THAT THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD, BUT DID NOT STOP THE VEHICLE IMMEDIATELY. AS A RESULT, THE CONTACT REAR ENDED THE PRECEDING VEHICLE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. THE CONTACT CALLED PAUL BLANCO'S GOOD CAR COMPANY OAKLAND AT 510-746-4900 (LOCATED AT 7201 OAKPORT ST, CA 94621) AND PROVIDED THE TECHNICIAN WITH THE INSURANCE INFORMATION AS REQUESTED. THE CONTACT STATED THAT THE FRONT END OF THE VEHICLE WAS DAMAGED; HOWEVER, IT WAS STILL ABLE TO BE DRIVEN TO A BODY SHOP. THE INSURANCE COMPANY TOOK POSSESSION OF THE VEHICLE. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED THE CONTACT WITH A CASE NUMBER. THE FAILURE MILEAGE WAS APPROXIMATELY 41,000.
Air bags, Vehicle speed control, Service brakes, Jun 5, 2018
"TAKATA RECAL" THE AIR BAG LIGHT KEEPS TURNING ON . FEEL LOSS OF POWER WHEN DRIVING SPEED LIMIT UNDER FOURTY-FIVE ALSO SUDDENDLEY LOOSES POWER WHEN GOING THE SPEEDOF SEVENTY-SEVENTY-FIVE SPEED IN THE HIGHWAY SPEED DROPS TO FIFTY-FIVE FEELS LIKE IT WANTS TO STOP. AFRAID OF GETTING HIT FROM BEHIND ALSO HESITATES WHEN DRIVING THE SPEED LIMIT UNDER FOURTY-FIVE FEELS LIKE IT WANTS TO STOP. ALSO THE FRONT WHEEL ALIGMENT LIGHT KEEPS TURNING ON WHEN ITHECAR IS IN MOTION AND THE AIRBAG LIGHT ALSO TURNS ON WHEN THE CAR IS IN MOTION. THESE THING HAVE BEEN HAPPENING SINCE APRIL 2018 MY CAR HAS ONLY 41,OOO MILES ON IT
Seat belts, Vehicle speed control, Service brakes, May 23, 2018
PUCHASE MY ELANTRA IN JUNE 2017, WHEN IT RAIN OR FIRST THING IN THE AM THE BRAKES WILL MAKE A SOUND LIKE I NEED NEW BREAKS AND LIKE THE ROTOR NEED REPLACED. I TOOK IT IN AND THEY SAID EVERYTHING WAS FIND. ONE YEAR LATER STILL HAVE THE SAME PROBLEM. THE SEATBELT LIGHT COMES ON AND CONTINUES TO BEEP WITH NO ONE SITTING IN THE SEAT AND THE ONLY WAY I CAN GET IT TO GO OFF IS TO SNAP THE SEATBELT. SOMETIMES I HAVE ACCESS TO MY BLUETOOTH PHONE AND SOMETIMES IT DOESN'T WORK OR THE DISPLAY IS NOT ACCESSIBLE
Service brakes, Apr 24, 2018, crash
WAS DRIVING ON THE HIGHWAY AT SPEEDS OF AROUND 25-30 MPH...CAR IN FRONT OF ME SLOWED DOWN SO I ATTEMPTED TO SLOW DOWN. I PRESSED ON BRAKE PEDAL BUT CAR DID NOT STOP. IF FELT LIKE IT STARTED TO START THEN SLIPPED AND GAINED SPEED RESULTING IN A FRONT END CRASH. THIS MODEL HAS A RECALL BUT WHEN I PUT IN MY VIN IT SAYS NOT AFFECTED BYTHE RECALL ON THESE BRAKES BUT I'M SEEING SIMILAR COMPLAINTS.
Service brakes, Feb 28, 2018, crash
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. WHILE DRIVING HIGHWAY SPEEDS, THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE BRAKES FAILED TO RESPOND. AS A RESULT, THE VEHICLE WAS INVOLVED IN A FRONT END COLLISION. THE FAILURE OCCURRED WITHOUT WARNING. A POLICE REPORT WAS FILED. THE DEALER AND MANUFACTURER WERE NOT CONTACTED. THE VEHICLE WAS TOWED TO THE BODY SHOP; HOWEVER, A DETERMINATION HAD NOT BEEN MADE REGARDING IF THE VEHICLE WAS STILL OPERABLE. THERE WAS ALSO A PREVIOUS BRAKE FAILURE THAT RESULTED IN A CRASH. THERE WAS ONE INJURY, BUT MEDICAL ATTENTION WAS NOT REQUIRED. THE CONTACT SUFFERED MODERATE ABRASIONS. THE FAILURE MILEAGE WAS NOT PROVIDED.
Air bags, Service brakes, Feb 22, 2018, crash
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT ATTEMPTED TO APPLY THE BRAKE PEDAL, BUT THE VEHICLE ACCELERATED. AS A RESULT, THE CONTACT REAR ENDED THE PRECEDING VEHICLE. THE WERE NO WARNING INDICATORS ILLUMINATED BEFORE OR AFTER THE FAILURE. THE AIR BAGS PARTIALLY DEPLOYED. THE DRIVER SUSTAINED MINOR INJURIES, WHICH REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC, BUT WAS NOT DIAGNOSED OR REPAIRED. THE DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THERE WERE NO OPEN RECALLS ON THE VEHICLE AT THE TIME OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 17,000.
Air bags, Service brakes, Jan 16, 2018, crash
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. WHILE DRIVING 45 MPH, THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE VEHICLE FAILED TO STOP. AS A RESULT, THE CONTACT CRASHED INTO THE PRECEDING VEHICLE. THE AIR BAGS FAILED TO DEPLOY. THE CONTACT WAS NOT INJURED, BUT SOUGHT MEDICAL ATTENTION THE FOLLOWING DAY. A POLICE REPORT WAS FILED. THE CONTACT WAS ABLE TO DRIVE AWAY FROM THE SCENE OF THE CRASH. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED OR REPAIRED. A LOCAL DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 10,000. THE VIN WAS NOT AVAILABLE.
Other or unspecified, Service brakes, Dec 17, 2017
LEASED A BRAND NEW HYUNDAI ELANTRA 2017 WITH A KNOWN BRAKE SAFETY ISSUE WITHOUT THE ISSUE BEING REPAIRED PRIOR TO OR BEING NOTIFIED IMMEDIATELY OF THE ISSUE AT THE TIME OF THE SALE. THE PURCHASE WAS MADE 4 MONTHS AFTER THE RECALL STARTED FROM THE BAY RIDGE HYUNDAI DEALERSHIP IN BROOKLYN, NY. NHTSA RECALL #17V063000
Wheels, Electronic stability control (ESC), Service brakes, Dec 9, 2017
AS OF LAST WEEK, MY TRANNY SEEMED LIKE IT WAS SLIPPING. SOMETIMES IT DID , OTHER TIMES IT JERKE.. ANYWAY, IT SNOWED HERE IN UPSTATE NY. I AMAL OVER THE ROAD. MY TIRES SEEM OK. BRAKES ARE GRINDING. CARS ONLY A YEAR OLD SOON. I HAVE 3 CHILDREN IN THE CAR. I AM ALWAYS IN MOTION. GETTING SCARED TO DRIVE. IT FEELS LIKE THE TIRES THOUGH TOO.. WHAT KIND OF TIRES DOES THIS CAR HAVE.. DOES IT HAVE ALLSEASONS? DOESNT FEEL LIKE IT. ANYWAY THIS SHOULD NOT BE HAPPENING.. HELP.
Steering, Other or unspecified, Service brakes, Oct 18, 2017
LEASED THE NEW HYUNDAI ELANTRA SE ON JUNE 28TH 2017 AND ON AUGUST7 2017 THE DEALER CALLED AND WAS TOLD THE CAR HAS BEEN RECALLED AND HAS TO BE SERVICED. THE RECALLS WERE FROM FEB2017 AND APRIL 2017 AND NEVER REPAIRED. I WAS LEASED THIS CAR AS NEW WITH TWO EXISTING RECALLS AND NEVER BEEN INFORMED.
Service brakes, Oct 14, 2017
WHILE DRIVING ON THE FREEWAY AND EXITING AN OFFRAMP. HITTING THE CAR'S BRAKES MADE THE BRAKE PEDAL TURN REALLY LOOSE AND ALMOST TO THE FLOOR. INSTANT BRAKING ABILITY WAS LOST AND THE CAR WENT INTO A SLOW BRAKE WHILE WOBBLING LEFT TO RIGHT. SPLIT SECOND TIMING OF TURNING THE WHEEL AVOIDED CRASHING INTO THE CAR DIRECTLY IN FRONT. AFTER THAT THE BRAKES RESUME NORMAL FUNCTION. ...UPDATED 10/18/17 *BF UPDATED 9/10/18*JB
Service brakes, Sep 19, 2017, crash
THE VEHICLE HAS APPROXIMATELY 5,500 MILES ON IT AND IT WAS BEING DRIVEN 10-15 MILES AN HOUR ON A CITY STREET. WHEN TRYING TO COME TO A STOP THE BRAKE PEDAL WENT TO THE FLOOR AND WOULD NOT STOP THE VEHICLE. IT HIT ANOTHER VEHICLE AND AFTER PUMPING THE BRAKE PEDAL THE BRAKES RETURNED TO NORMAL. THERE IS A CURRENT RECALL ON THIS MODEL AND YEAR TO REPLACE THE BRAKE BOOSTER BUT IT DOESN'T CURRENTLY INCLUDE THIS VEHICLE'S MANUFACTURED DATE. IT'S HYUNDAI RECALL NUMBER 157 AND NHSTA SAFETY CAMPAIGN #17V063000.
Vehicle speed control, Electronic stability control (ESC), Service brakes, Sep 19, 2017
3 OCCURRENCES: LEAVE FROM PARKING SPACE- TURN ON ENGINE- WAIT UNTIL TACHOMETER GOES TO 1- WITH FOOT ON BRAKE, SHIFT INTO D- TACHOMETER REACHES 5 ON SPEEDING ENGINE BEFORE ABLE TO TURN OFF IGNITION. DRIVING VERY SLOW- WITH FOOT ON BRAKE- IN FORWARD TO LARGE PARALLEL PARKING- SPEEDS UP- BRAKES SPONGY- DOES NOT STOP CAR. ONLY HIGH CURB PREVENTS CAR FROM CLIMBING ON SIDEWALK AND GIVING ME TIME TO TURN IGNITION OFF. STOPPING AT TRAFFIC LIGHT ON ROAD WITH A 35 MILE SPEED ZONE. AFTER STOP, BRAKE BECOMES SPONGY, CAR'S WHEELS BEGIN SKIDDING- CAN ONLY TURN OFF IGNITION TO STOP THE CAR. EVERYTHING BACK TO NORMAL WHEN I TURNED IGNITION BACK ON, AS WAS THE CASE WITH THE FIRST AND SECOND OCCURRENCES LISTED ABOVE. VEHICLE WAS STATIONARY IN THE FIRST OCCURRENCE, WAS IN MOTION IN A PARK IN THE SECOND OCCURRENCE AND ON A COUNTY ROAD WITH A SLIGHT TURN TO THE LEFT IN THE THIRD OCCURRENCE.
Structure, Service brakes, Aug 31, 2017
2017 HYUNDAI ELANTRA. CONSUMER WRITES IN REGARDS TO VEHICLE ENGINE AND BRAKE ISSUES. *LD THE CONSUMER STATED WHILE TRAVELING IN THE RAIN THE BRAKES BECAME HOT. AFTER PARKING THE VEHICLE OVERNIGHT THE BRAKES MAY MALFUNCTION. ALSO, BEHIND THE MOTOR THERE WAS A LARGE OPENING THAT MAY COLLECT LEAVES NEAR THE ENGINE AND CAUSE A FIRE. UPDATED 08/31/2017*JS
Air bags, Seat belts, Service brakes, Jun 24, 2017
NO COMPLAINT
Vehicle speed control, Electronic stability control (ESC), Service brakes, May 13, 2017
MY VEHICLE HAS ACC (ADAPTIVE CRUISE CONTROL) AND, WHEN SET, WILL ACCELERATE AND BRAKE AS NEEDED TO KEEP A CERTAIN DISTANCE FROM THE VEHICLE IN FRONT THAT THE SYSTEM HAS IDENTIFIED VIA THE RADAR AND CAMERA. I HAD AN INSTANCE WHERE THERE WAS A MOMENTARY LOSS OF POSITIVE CONTROL OF THE VEHICLE UNDER CERTAIN CONDITIONS. IN THIS EVENT, IT WAS A HAZY AFTERNOON WITH WET ROADS. I WAS FOLLOWING A VEHICLE ON A ROAD WITH THE ACC SET. THE VEHICLE IN FRONT STARTED A DECELERATION LESS THAN 10MPH/S AND MY VEHICLE AUTOMATICALLY STARTED PROGRESSIVELY INCREASING BRAKING ACTION TO MAINTAIN SEPARATION. 1.5 - 2 SECONDS FOLLOWING; IT APPEARED AS THOUGH THE ABS KICKED IN AND DISCONNECTED/OVERRODE THE ACC WITCH SUBSEQUENTLY STOPPED THE BRAKING ACTION ALL TOGETHER. AS A RESULT MY VEHICLE PROCEEDED TORWARD THE VEHICLE IN FRONT OF ME IN A CRITICAL MOMENT THAT REQUIRED, NOW, EVEN MORE BRAKING ACTION IN CONDITIONS THAT INITIALLY CAUSED THE ABS SYSTEM TO ACTIVATE UNDER NORMAL BRAKING ACTION CONTROLLED BY THE ACC. I WAS AWARE AND HAD NOT LET THE SEMI AUTONOMOUS FEATURES OF MY VEHICLE LULL ME INTO COMPLACENCY. I REACTED QUICKLY AND A COLLISION HAD NOT OCCERED. OTHERS MAY NOT BE SO QUICK TO RESPOND IN A SIMILAR SITUATION. I BELIEVE THE SYSTEM DEACTIVATED AS A RESULT OF THE ABS SHAKING THE BRAKE PEDAL OR CONTROL LINKAGES, WHERE, IN NORMAL OPERATION DEPRESSING THE BRAKE DISCONNECTS THE ACC IF THE SYSTEM STARTS AN UNWANTED ACCELERATION OR THE OPERATOR SIMPLY WANTED TO DISCONNECT THE SYSTEM WITHOUT TOGGLING THE STEERING WHEEL DISCONNECT SWITCH. THIS FEATURE IS AVAILABLE ON ALL LIMITED ULTIMATE 2017 HYUNDAI ELANTRAS.
Service brakes, Mar 9, 2017
TL* THE CONTACT OWNS A 2017 HYUNDAI ELANTRA. THE CONTACT STATED THAT WHILE THE VEHICLE WAS BEING OPERATED AT 60 MPH, THE BRAKE PEDAL WAS DEPRESSED AND THE VEHICLE BRAKES PULSATED AND JERKED INCREASING THE DISTANCE BEFORE A STOP. THE CONTACT WAS NOT SURE IF A WARING INDICATOR ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED OR REPAIRED. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 17V063000 (AIR BAGS) HOWEVER, THE PART FOR THE RECALL REPAIR WAS UNAVAILABLE. THE CONTACT STATED THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 600. PARTS DISTRIBUTION DISCONNECT.
Other or unspecified, Service brakes, Jan 21, 2017, crash
WHILE DRIVING, MY CAR STARTED TO MAKE A BEEPING SOUND I HAD NOT HEARD BEFORE. I LOOKED AT THE DASHBOARD AND THE MULTI-MEDIA SYSTEM AND I DID NOT SEE ANY WARNING INDICATORS/LIGHTS. WHEN I STOPPED AT A RED LIGHT I PUT THE CAR IN PARK, TURNED THE CAR OFF AND TURNED THE CAR BACK ON (PUSH TO START). I PROCEEDED TO DRIVE AGAIN AND THE CAR BEGAN TO BEEP THAT UNFAMILIAR SOUND AGAIN. STILL NO VISIBLE WARNING INDICATORS/LIGHTS. I PULLED OVER, PUT THE PARKING BREAK ON, PUT THE CAR IN PARK, TURNED THE CAR OFF AND THEN TURNED THE CAR BACK ON. I BEGAN TO DRIVE AGAIN AND THE CAR WAS NO LONGER BEEPING. WHILE DRIVING I STEPPED ON THE BREAK PEDAL WITH THE INTENT TO SLOW DOWN BECAUSE OF SLOWING TRAFFIC, MY CAR DID NOT SLOW DOWN. I SLAMMED ON THE BREAK, THE CAR STILL DID NOT SLOW DOWN AND I HIT THE CAR IN FRONT OF ME. AFTER I HIT THE CAR IN FRONT OF ME MY CAR WAS STILL PUSHING, I STEPPED ON THE BREAK AGAIN AND THE CAR FELT AS IF IT WAS STILL TRYING TO PUSH FORWARD, I PULLED THE EMERGENCY BREAK AND THE CAR STOPPED. A POLICE OFFICER WAS ALREADY ON THE SCENE, THEN NOTIFIED US PARK POLICE TO COME AND TAKE A REPORT.