What 598 owners told NHTSA about the 2018 Honda Civic Si

Water leakage from the engine bay that damages coil packs and spark plugs. Coil pack seal is not durable enough to repel water once its introduce from the hood scoop.

NHTSA ODI 11427480

Driving on the highway and my check engine light starting to flash. I experienced loss of power and hesitation during acceleration. I got home and scanned my computer and it returned P0304. I then removed the #4 ignition coil and that's when I noticed rust. Seems like the seal on the ignition coil failed and water has been leaking into the #4 cylinder over time.

NHTSA ODI 11418794

WHILE DRIVING AT 50 MPH ON THE RIGHT LANE OF THE SAW MILL PARKWAY THE ENGINE SUDDENLY STOPPED RUNNING. THE CAR CAME TO A HALT IN THE RIGHT LANE. IT WAS IMMOVABLE. I PUT THE FLASHERS ON, PUT THE GEAR SHIFT IN PARK AND PUSHED THE START BUTTON. THE CAR DID START. I DROVE IT HOME BUT AM AFRAID TO DRIVE IT AGAIN.

NHTSA ODI 11413940

AC SYSTEM WENT OUT 3 TIMES IN LESS THAN 8 MONTHS

NHTSA ODI 11413640

THE A/C EVAPORATOR HAS APPARENTLY STOPPED WORKING. THE CONDENSOR HAD TO BE REPLACED BECAUSE IT WAS NOT MANUFACTURED TO SPECIFICATIONS, AND A RECALL WAS GENERATED. I AM OF THE OPINION THAT THE SAME THING HAS HAPPENED TO THE EVAPORATOR, AS THIS IS A PART THAT SHOULD NOT HAVE FAILED.

NHTSA ODI 11406039

TL* THE CONTACT OWNS A 2018 HONDA CIVIC. THE CONTACT STATED THAT WHEN DRIVING AT 45 MPH, THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE VEHICLE STALLED AND SMOKE EMITTED FROM UNDER THE HOOD. THE VEHICLE WAS TOWED TO SERVICE CENTER AT HOLMAN HONDA LOCATED AT 12 EAST SUNRISE BLVD, FORT LAUDERDALE, FL 33304 PHONE (954) 607-6730. THE DEALER PERFORMED A DIAGNOSTIC THAT FOUND THAT THE ENGINE SHORT BLOCK FRACTURED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED. THE FAILURE MILEAGE WAS 36,000.

NHTSA ODI 11404701

10/16/2020 I WAS DRIVING MY 2018 HONDA CIVIC LEASE VEHICLE WITH 20,099 MILES STILL UNDER HONDA BUMPER TO BUMPER WARRANTY. CAR SHUT OFF WHILE DRIVING IN THE MIDDLE OF THE ROAD WITHOUT WARNING AND WILL NOT START, IT WAS TOW IN TO HONDA DEALER & AS OF TODAYS DATE 1/23/2021 ITS STILL SITTING AT HONDA OF DOWNTOWN LOS ANGELES CAN NOT FIGURED OUT AND HAS HONDA CASE # 11791655 - UN SAFE DEFECTIVE INTERNAL ENGINE POSSIBLY AND THEY DO NOT WANT OTHER CONSUMER'S TO KNOW

NHTSA ODI 11389601

SINCE SHORTLY AFTER I GOT MY CAR, BRAND NEW, IT STARTED TO STALL A LITTLE BIT AS I WENT TO TURN, IF I HAD TO STOP OR SLOW DOWN BEFOREHAND. IT GOT WORSE AS TIME WENT ON. I TOLD HONDA BEFORE MY FIRST YEAR WAS UP AND HE TOLD ME TO JUST TAKE OFF ECO. I DID, BUT EVENTUALLY IT STARTED DOING THAT WITHOUT ECO. I'M AFRAID IT'S GONNA DO THAT WHEN I HAVE TO TURN LEFT ONTO A BUSY ROAD AND NOT BE ABLE TO GET OUT OF THE WAY FAST ENOUGH. BOTH ECO AND NON ECO SHOULD WORK EFFICIENTLY. THE DATE BELOW IS AN ESTIMATE OF WHEN IT STARTED. IT'S BEEN A COUPLE YEARS.

NHTSA ODI 11374907

VEHICLE WILL NOT START. THE VEHICLE WAS SITTING IN MY OFFICE PARKING LOT THE FIRST TIME THIS HAPPENED AND WENT TO LEAVE AND THE INSIDE LIGHTS FLASHED AND THEN SEEMED AS IF THE BATTERY DIED. GOT CAR JUMPED OFF, TOOK TO ECONOMY HONDA IN CHATTANOOGA, TN THEY CHECKED IT AND SAID NOTHING WAS WRONG AND THE BATTERY WAS FINE. LEFT AND NOW ABOUT A MONTH LATER IT IS DOING THE EXACT SAME THING. WENT TO START IT, LIGHTS FLASH AND IT WONT COME ON AND NOW IT'S NOT DOING ANYTHING.

NHTSA ODI 11363685

CHANGED THE OIL FOR THE SECOND TIME ~12,300 MILES ON MY 2018 HONDA CIVIC EX HATCHBACK WITH THE CVT AND DRAINED 5 QUARTS OF OIL/FUEL OUT OF THE ENGINE. (ONLY HOLDS ~3.7QTS. HAD A VERY STRONG GAS SMELL TO THE OIL. CONCERNED WITH DILUTED OIL NOT LUBRICATING EFFECTIVELY AS WELL AS EXCESS OIL/FUEL IN THE ENGINE CAN CAUSE OVERHEATING, FROTHING ALONG WITH OTHER CONCERNS. THIS OIL WAS DRIVING ALL HIGHWAY MILES AND DURING THE SUMMER.

NHTSA ODI 11354410

AC WAS WORKING NORMAL WHEN ALL OF SUDDEN DRIVER SIDE STARTED BLOWING HOT AIR AND PASSENGER SIDE SOME WHAT COLD.DRIVING ON SURFACE STREET.

NHTSA ODI 11337505

MY VEHICLE WAS IN MOTION ON THE HIGHWAY WITH 68,000 MILES, AND NO SIGNS OF ANY LEAK OR DEFECTS BEFORE DRIVING HOME , 2 YEAR OLD VEHICLE WAS ABRUPTLY SHOW SOME WARNING LIGHTS ON THE DASH SO PULLED OVER ALL HAPPENED IN LESS THAN 2 MINUTES UNTIL I COULD PULL OVER THE SIDE , THE ENGINE OVERHEATED, I MAINTAIN ALL SCHEDULE MAINTENANCE AT DEALER AND WAS UP TO DATE ON SERVICES , I BELIEVE THIS WAS A MECHANICAL FAILURE AND NOT NEGLIGENCE ON MY PART, MY EXTEND COVERAGE WON'T ACCEPT MY CLAIM FOR REPAIRS ,CURRENTLY WITH OUT CAR AND STILL PAYING LOAN AND FACING A $9500.00 REPAIR COST WHICH I BELIEVE THE EXTENDED COVERAGE OR HONDA DEALER INSPECT THE ENGINE FOR ENGINEERING DEFECT IN DESIGN OF COOLING OF MOTOR ,CAR WAS NEVER ABUSED OR DRIVING NEGLIGENCE AND I BELIEVE SHOULD BE REPAIR AT NO COST TO ME, PORTFOLIO ELITE PROTECTION PLAN IS MY EXTENDED WARRANTY WHICH IS 5YEAR/100,000 MILE'S COVERAGE, DEALER REPAIR CENTER IS ROBERTSON PALMDALE HONDA . ALL HELP WELL BE WELCOME THANK YOU

NHTSA ODI 11331352

FIRST OIL CHANGE AT 4965MI. INDICATES ODOR OF GASOLINE COMING FROM THE OIL DIPSTICK IN THE ENGINE COMPARTMENT.

NHTSA ODI 11298815

OIL DIP STICK SMELL LIKE GAS GOING INSIDE THE OIL CAR LACK POWER I NOTICED IT IN COLD WEATHER WE ARE HAVING IN CA STATE A LOUD WHIRLING ENGINE NOISE COMING FROM TOP OF ENGINE DIP STICK SHOW MORE THEN WHAT I FIRST STARTED WITH WHEN I CHANGE OIL 3K MILES B4 IT STALL OUT ON ME 2 TIMES IN THE LAST 3MONTH I LIVE IN AGUANGA CA TEMP FELL TO 29 DEGREES FOR THE LAST COUPLE MONTH WINTER WEATHER WITH SNOW

NHTSA ODI 11292391

2018 HONDA CIVIC HATCHBACK, GASOLINE SMELL IN CABIN OCCURRED ON 8/16/2019. 1.5L OIL DILUTION COULD BE CAUSE OF ISSUE.

NHTSA ODI 11244554

TL* THE CONTACT OWNS A 2018 HONDA CIVIC. WHILE DRIVING APPROXIMATELY 25 MPH, THE VEHICLE SUDDENLY STALLED. THE VEHICLE'S STOP WARNING ALERT NOTIFIED THE DRIVER TO PULL OVER. THE VEHICLE WAS TAKEN TO SCOTT ROBINSON HONDA (20340 HAWTHORNE BLVD, TORRANCE, CA 90503) TO BE DIAGNOSED, BUT THEY WERE UNABLE TO REPLICATE THE FAILURE. THE DEALER TURNED OFF THE SYSTEM SENSOR. THE CONTACT ALSO STATED THAT THE STEERING WHEEL SEIZED. THE CONTACT TOOK THE VEHICLE TO DCH GARDENA HONDA (15541 S WESTERN AVE, GARDENA, CA 90249, 301-660-7286) WHERE THE FAILURE INITIALLY COULD NOT BE REPLICATED. DURING THE THIRD TEST, WITH THE CONTACT IN THE VEHICLE, THE FAILURE RECURRED. THE VEHICLE WAS NOT REPAIRED AND THE CAUSE OF THE FAILURES WAS NOT SPECIFIED. THE CONTACT STATED THAT THEY WERE WAITING FOR HONDA'S CORPORATE OFFICE TO RESPOND. THE MANUFACTURER PROVIDED CASE NUMBER: 09732156. THE FAILURE MILEAGE WAS 11,200.

NHTSA ODI 11243302

ACCELERATING UP TO 60 MPH CAR BEGAN TO JERK VIOLENTLY. FLASHING CHECK ENGINE LIGHT CAME ON AND ALL CONTROL OF GAS PETAL WAS LOST UNTIL CAR SLOWED TO UNDER 20 - 25 MPH. OBD2 CODES PULLED AND REPORTED MISFIRING IN CYLINDER 1. CAR NOT ABLE TO BE DRIVEN UNDER ANY NORMAL CONDITIONS AS MISFIRING HAS INTENSIFIED. 2018 HONDA CIVIC SI

NHTSA ODI 11210500

OIL DILUTED WITH FUEL (3/4" ABOVE THE FULL MARK ON THE DIPSTICK) - THIS IS A PROBLEM WITH HONDA'S 1.5 TURBO ENGINE (CIVIC, CRV). OTHERS WITH THIS ISSUE HAVE REPORTED THEIR VEHICLES STALLING WHILE DRIVING AT 70 MPH -- DEFINITELY A SAFETY ISSUE.

NHTSA ODI 11202744

TL* THE CONTACT OWNS A 2018 HONDA CIVIC. WHILE AT A RED LIGHT, THE VEHICLE STALLED. THE GEAR HAD TO QUICKLY BE SHIFTED INTO PARK TO RESTART THE VEHICLE. IN ADDITION, THE BRAKE HOLD INDICATOR FLASHED WITHOUT THE CONTACT ACTIVATING THE FEATURE. THE BUTTON HAD TO BE MANUALLY PRESSED TO PREVENT THE WARNING INDICATOR FROM FLASHING. THE CONTACT HAD TO DISENGAGE THE BRAKE SYSTEM TO MANEUVER THE BRAKE PEDAL AS A SAFETY PRECAUTION WHILE THE VEHICLE WAS IN MOTION. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS NOT AVAILABLE.

NHTSA ODI 11196878

MY CAR JUST LAST SATURDAY HAS STARTED DRAINING LIGHT BLUE FLUID,AND I WAS TOLD IT IT THE VEHICLE'S ENGINE BLOCK. THE DEALERSHIP I BROUGHT THE CAR TO SAYS THAT HONDA SENT A NOTICE TO HONDA OWNERS FOR THIS MAKE AND MODEL WITHIN A SPECIFIC YEAR RANGE BECAUSE OF THE PROBLEMS IN ITS ENGINE BLOCK. HONDA DID EXTENT THE WARRANTY TO 10 YEARS FROM THE ORIGINAL PURCHASE DATE. MY CONCERN IS THAT I BOUGHT THE CAR IN 2011 AS CERTIFIED USED CAR IN A HONDA DEALERSHIP, AND BEING A SECOND OWNER, I NEVER GOT ANY SAFETY CONCERNS OR RECALLS REGARDING THIS VEHICLE BY ANY MEANS (MAIL, CALL, EMAIL). I NOT AWARE OF ANY PROBLEMS WITH THIS CAR, WHICH HONDA KNEW ALL ALONG. TO MAKE MATTERS WORSE, THEY DENY WORKING ON MY CAR AS IT IS OVER 10 YEARS WARRANTY FROM ITS ORIGINAL PURCHASE, EVEN THOUGH MY CAR ONLY HAS 66000 MILEAGE ON IT. MY CAR PROBABLY DID JUST SHOW SIGNS LATE BECAUSE OF ITS LOW USAGE.

NHTSA ODI 11192040

SUSPECTED OIL DILUTION... RECENT DEALERSHIP OIL CHANGE, LESS THAN A WEEK LATER, THE VOLUME OF "OIL" WAS APPROX. 1/2 INCH OVER THE TOP OF THE DIP STICK MEASUREMENT SECTION. DEALER RE-DID THE OIL CHANGE TWO WEEKS LATER, AND WE WILL CONTINUE TO OBSERVE. THE OIL DOES HAVE A STRONG SMELL OF GASOLINE... COMPARED TO OTHER VEHICLES. I AM CONCERNED ABOUT THE LONGEVITY OF THE ENGINE DUE TO EXCESSIVE WEAR RELATED TO INSUFFICIENT LUBRICATION.

NHTSA ODI 11184928

I'VE BEEN SMELLING GAS IN THE CABIN OF THE VEHICLE ONLY DURING START UP AND ITS BEEN HAPPENING FOR THE PAST COUPLE OF WEEKS. THE CAR IS PARKED IN A HEATED PARKING GARAGE WHEN THE SMELL OCCURS AND IT WILL ALSO HAPPEN OUTSIDE IN A PARKING LOT AFTER THE CAR SITS FOR A LITTLE BIT. YOU CAN ALSO SMELL A STRONG ODOR OF GAS WHEN YOU OPEN THE HOOD WHEN THE ENGINE IS COLD.

NHTSA ODI 11155529

AT 4400 MILES ON THE 2018 CIVIC HATCHBACK 1.5 L (APPROX 4 MOS) THE VEHICLE LOST POWER MOMENTARILY WHILE ACCELERATING AT ABOUT 30 MPH AND HAD A STRONG GAS SMELL IN THE CABIN. A CHECK OF THE OIL SHOWED THAT IT WAS EXTREMELY OVERFILLED WHEN PREVIOUS CHECKS DID NOT. HONDA DEALER (IDE HONDA, ROCHESTER, NY) REPLACED THE OIL AND OFFERED NO CORRECTIVE ACTION OR INFORMATION.

NHTSA ODI 11154111

AT 2025 MILES MY 2018 CIVICTHAT I HAD FOR 2ISH MONTHS STARTED SMELLING LIKE FUEL IN THE CAB. SO I LOOKED IT UP AND THE EARTH DREAMS MOTOR IS HAVING OIL DILUTION PROBLEMS AND IT IS BECOMING MORE COMMON. SO I CHECKED MY OIL AND FOUND MY CAR A QUART OVERFULL WITH FUEL IN MY OIL. I THEN HAD IT TOWED TO THE DEALERSHIP WHERE THEY GAVE IT A FREE OIL CHANGE AND SAID THAT THERE IS NO FIX ANDIT IS NORMAL. THE OIL VISCOSITY WILL DETERIORATE EVENTUAL LEAVING ME WITHA KNOCK OR DISABLED ON THE SIDE OF THE ROAD. IT IS AN ISSUE THAT CAN CAUSE A CRASH OR SICKNESS WHEN THE NOXIOUS GAS SMELL COMES BACK. I HAVE NOW PUT 450 MILES ON IT SINCE THE OIL CHANGE AND AM SMELLING FUEL IN MY OIL AGAIN.

NHTSA ODI 11150028

FUEL SMELL IN ENGINE OIL AND ENGINE OIL IS OVER FILLED ON DIPSTICK NOT LONG AFTER OIL CHANGE POSSIBLY DUE TO FUEL DILLUTION INTO OIL

NHTSA ODI 11149831