What 574 owners told NHTSA about the 2017 Honda Civic Si

While driving the car on April 19, 2026, the car started losing engine power, was unable to maintain current speed of roadway, had to drive less than 15 miles an hour to a safe location. Had the car towed to the dealership they said there was a faulty code throwing for cylinder three had the fuel injectors replaced. Pick the car up drove not even 2 miles and car was still having the same issue turned around went back to the dealership. They said the car wasn’t throwing any codes picked the car up. It drove fine for less than a week and had to repeat of the same situation, had the car towed again to the dealership all to find out there is a crack in the head gasket, unsure if the turbo was affected after researching apparently this is a very common problem for this make, and model of car.

NHTSA ODI 11735784

The component or system that failed their malfunction is the evaporation system in the Honda vehicles especially after 2017 that regarding the R – 1234YF refrigerant - yes it has been confirmed by the dealership that the evaporator is leaking inside the car, but it is a known issue that warranty only covers the condenser in front of the car which also leaks. My problem is is since both equally run the same R – 1234YF refrigerant this type of refrigerant is known to cause corrosion and pinholes within the condenser and evaporated tubes leading to further issues with AC and cooling problems. There are no warning lights when it comes to these issues, which also pushes a further problem. If you were to go to any Honda dealership or ask, usual people who have condenser issues it could usually and most cases lead back to the evaporator, which also has systematic problems due to Hondas negligence and they knew about this refrigerant because they released it in 2017 to all the models that run the R – 1234YF refrigerant the main problem is the evaporator is supposed to suck out hot air from the car, but if it doesn’t do that and the car can have overheating problems, or it can cause dangerous heat inside the car, causing extreme sweating or even death in certain cases

NHTSA ODI 11733753

The head gasket failed on my 2017 Honda civic after 110,000 miles I had the Honda dealership of Decatur fix the head gasket and it failed again after 36,000 miles this appears to be a massive issue Honda is having with these cars. And mine and other’s safety were put into risk because the car went into limp mode while I was driving on the interstate and yes the dealership confirmed that the head gasket has failed again after replacement and no it has not been inspected by anyone yet and no there was no warning of it failing before the car went into limp mode while I was doing highway speeds

NHTSA ODI 11726123

The 10th generation Honda Civic's have multiple extended warranties from Honda for bad Air Compressors and Condensers. And the A/C Evaporator needs to be included in this. My car only has 60,000 miles on it, is not driven daily, and my A/C Evaporator is leaking Freon due to a bad part. The parts for these A/C systems were designed poorly and degrade too quickly.

NHTSA ODI 11723552

The contact owns a 2017 Honda Civic. The contact stated that while starting the vehicle, the Electronic Power Steering, Evaporative Emission Control System, Check Engine, and Antilock Braking System lights were illuminated; however, the contact had not experienced any failures or malfunctions while operating the vehicle. The vehicle was not taken to the dealer to be diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 102,192.

NHTSA ODI 11695724

I am filing a safety complaint regarding my 2017 Honda Civic Hatchback and the dangerous issue related to its air conditioning (A/C) system — a problem affecting many Civic owners nationwide. I initially brought my vehicle to Honda City Chicago for a Honda “campaign” repair (a term they use instead of calling it a recall) in 2023 and again this year, related to the A/C system. I was told the issue would be resolved. However, after agreeing to an optional transmission oil change they recommended, I was later told the A/C still wasn’t fixed — and that I now needed to pay $400 for a diagnostic. That diagnostic revealed the actual problem: a locked A/C compressor. (Which they knew they just wanted the money) This defect is not just an inconvenience — it’s a serious safety hazard. When the A/C is turned on, the locked compressor causes the engine to shake violently and stall completely. This happened to me at a red light; the car shut off, became unresponsive, and I was stuck blocking traffic. If this had occurred while driving at higher speeds, the consequences could have been catastrophic. Many Civic owners have reported similar compressor failures leading to engine stalls and unsafe driving conditions. Honda is aware of this issue but continues to treat it as isolated rather than a systemic defect. I urge the NHTSA to open a formal investigation into this widespread and dangerous issue involving locked A/C compressors in 2016–2020 Honda Civics. A safety recall is warranted before more drivers are put at risk or harmed due to this known defect.

NHTSA ODI 11678446

Had to get the fuel injectors replaced after faulty emissions notifications. Now the car stalls from start at a stop light or stop sign. The car also stalled in stop and go traffic on the highway. We have not been driving it over the winter. It's dangerous!

NHTSA ODI 11651768

We are experiencing a technical issue with the vehicle, which appears to be caused by a software or component error, rather than user error. This situation has led to the car starting unexpectedly and presenting challenges that could compromise safety while driving. Unfortunately, there has yet to be a recall or resolution communicated by the authorities.

NHTSA ODI 11633785

Cold start up issue where VTC Actuator is rattling and or grinding. This could potentially cause engine failure while starting or driving the vehicle. No check engine light or oil light. VTC Rattle/Grind occurred for 3-4 seconds and then stopped.

NHTSA ODI 11630265

The chain stretched and camshaft tensioner had to be replaced. The tech said this could only happen with low or insufficient oil, but every oil change on this car was done on time. There was a previous settlement because this engine has a known defect where fuel gets into the oil. Honda refused to honor the extended warranty agreed to in the settlement because the error codes that came up were PO341 CMP Sensor A and CKP Sensor Incorrect Phase Detected) and we had to pay $2,348.30 for repair of parts (chain, camshaft tensioner) that should have lasted the life of the vehicle without replacement.

NHTSA ODI 11628130

2017 Hatchbacks with the 1.5 liter engine 4 cylinder didn’t get an extended warranty yet all other Hondas with this engine did because of problems but not the hatchback when same parts and same problems I never want to buy a new Honda again . Had to get a coolant flush not soon after I bought it because car was over heating yet that’s all they did never looked by into why and then problem after problem . A night mare buying a new Honda . Seen many videos and read many threads of people with same year and sa b me complaints and I’ve contacted a lot of people and no place knows why the hatchbacks weren’t covered but other cars same engine same problem was. Had to rebuild engine and replace turbo at 103,00 miles after having to replace spark plugs every 7 thousand miles the whole time I owned it and adding coolant to it when dealership said it want a problem and did nothing about it and now at 130000 some miles car just keeps over heating and dealership just told me I need a new engine and wouldn’t tell me why and dealership never been helpful at all. Just look at my car and engine online and all the complaints. Then being told issue is fixed with an ECU update just don’t drive the car short distances with a lot of stop and goes only drive long distances and don’t drive in winter time . I lost it because how is that the problem being fixed . And all the carbon build up is insane. And the oil dilution problem still exists. All these defects and problems with a new car is insane . I figured a new car would be better but of course first new vehicle I buy is a Lemon and all these problems and Honda won’t do right by it . Car also going into what I call limo dick mode in middle of 4 lane high way is dangerous and doing that when car was under 20,000 miles and always has . Also parking brake still messes up even though it was recalled the problem still exists . Him screen occasionally freezes or goes blank or don’t work . Just non stop problems since bought new

NHTSA ODI 11594062

My Honda recently has had 10 warning lights pop up went in for oil change they couldn’t tell me the issue came back for another diagnosis and they are saying the engine has oil dilution. This is a known issue for this engine. But why does it affect abs, traction control, wiper sensor, auto high beam detection. , all of the lane assist , cruise control, early warning crash detection? This can be dangerous when you can’t quickly get the car into a dealership. And if it’s know issue they need a recall or free fix.

NHTSA ODI 11578191

Car fuel injectors will fail and cause misfiring. Dangerous to drive due to engine running rough. Unusual for fuel injectors to go out so soon especially when driven with care and using correct fuel octane.

NHTSA ODI 11571722

One of the piston rods broke and went through the block. Oil had heavy odor of gasoline

NHTSA ODI 11541796

check engine lights display periodically. The main one involves the fuel injectors. It has been an on going problem for 6-8 months. When I contacted the dealership I was told the part is not available Nationwide at this time and not sure when it will become available. While driving the car can go into "limp" mode where it doesn't let you go above 30 MPH. This problem first started approximately October 2022 after having the vehicle just over 7 months. When I contact the Dealership I was told there was nothing they could do but wait for the part to come in. Meanwhile I am paying for a vehicle that is not safe to drive , yet has no recalls on it. I was told by the Dealership that they have several vehicles at the auto auction that have the same issue that are not selling. I don't understand why Honda has not had a recall on this part. I am stuck with a vehicle ,my only means of transportation, still making payments, and it sits in the garage. Please let me know if there's anything else you need from me.

NHTSA ODI 11534738

These cars have horrendous AC issues. A spotlight needs to be on put on it. Broken AC can subject drivers to dangerously high temperatures in the cabin, even if the windows are rolled down in some climates. Honda, the maker of these vehicles, is still answerable for the supplier of the compressor/ac system, Keihin's, failures. There are many of us, but we haven't been able to connect the dots to see how many have truly been affected. I nearly suffered heatstroke driving this car. Was dizzy the night of at home, with outdoor temperatures reaching triple digits (Fahrenheit).

NHTSA ODI 11520818

The contact owns a 2017 Honda Civic. The contact stated that while his son was driving at an undisclosed speed, the vehicle lost motive power. The exhaust system, power steering, brake assist, power brake, hill assist, and traction control warning lights were illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the turbo charger and engine needed to be replaced. The dealer requested the oil change records. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 75,000.

NHTSA ODI 11516755

Fuel getting into oil

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19-033 19-038 honda sb Extended powertrain warranty. Included dtc codes for misfire. Dealer refuses to honor warranty Still have code for misfire. It's not fixed Honda has multiple issues across all model lines w fuel injectors It causes all warnings lights to go off on dash. Honda has case number already. Cylinder 4 misfire Cylinder 1-3 injectors bad. When did cars work with out injectors? It's a powertrain product. No where on sb does it state or imply certain conditions Also Honda in 2019 sent all owners 2016-2018 letters extending warranty. Especially w the misfire codes Per sb. To e ensure customer confidence i in our product, Honda IS extending ther powertrain warranty from the original 5 years/ 60,000 miles to 6 years with unlimited mileage from the original sale date This warranty extension applies to any engine 6 components, such as camshafts , rocker arm assemblies, or spark plugs, requiring repair due to damage resulting from hose concerns identified in the first paragraph. The ECU and TCM software is covered under the vehicle's emissions 5 warranty beyond 6 years. Irony same motor family is in the fit. Exact same code sb is....replace injectors 20-002

NHTSA ODI 11495693

My car has a significant engine oil dilution problem. Gasoline is starting to mix with the oil and it could potentially cause problems or complete engine failure. I am having issues with performance in cold weather due to this problem.

NHTSA ODI 11486816

I have oil dilution in my 2015 Honda Civic EX-T VIN [XXX]. Dealer performed the fixes. The Next time I had the oil sample checked it was worse. The oil smells like a weedeater. I am at 13.72% fuel in the oil. Very Rich. I live in Alabama where it is hot. I only drive long distances to and from work on the interstate. I need help. Honda is doing nothing. They are not telling the dealer anything or sharing any specs as acceptable percentage fuel in the oil. It is a coverup. TSBs have been done and engine checked and injectors are good. Please advise. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ODI 11460707

10.55% fuel was found in the oil according to a sample that was taken. Took to dealer and called honda. Dealer was told to perform Bulletin 18-137 I think. Dealer said was done and changed the oil also. Took a sample at 30% oil life after the fix and now there is 13.72% fuel in the oil. Took back to dealer they called Honda Engineers and was told it was normal and that was on the Low side 13.72%. Was not able to do anything. This is a coverup. You can smell fuel in the oil and oil is high on the dipstick when you check it and you can smell when driving.

NHTSA ODI 11452669

My vehicle has oil dilution issue. The engine releases toxic gas from the engine compartment to interior of the car though the air duct. This gives me major headache and forces me to drive with my widow open as to not worsen my asthma issues. After checking the oil dipstick I can smell the gas aroma coming from the oil. This is a serious environmental issue and an even greater health concern of mine. I pray my health does not deteriorate to where I develop cancer from the toxins.

NHTSA ODI 11443184

Coils and spark plugs getting rust/wet by water intrusion causing emisions problems the car is unable to drive.

NHTSA ODI 11441681

AIR CONDITIONER FAILS TO COOL AND INSTEAD BLOWS HOT AIR. HONDA AUTHORIZED SERVICE TECHNICIAN HAS CONFIRMED THAT A DEFECTIVE AIR CONDITIONER COMPRESSOR HAS CAUSED FREEON LEAKAGE FROM THE COMPRESSOR'S MAIN SHAFT THROUGHOUT THE SYSTEM.

NHTSA ODI 11406749