NHTSA Complaint #11684110 — 2016 HONDA CIVIC

Component that failed: The air conditioning system evaporator core failed, causing refrigerant leakage. The vehicle was inspected and diagnosed by a Honda dealership, which confirmed the failure and provided a written quote for replacement. The component is still installed and available for inspection. Safety risk: When the evaporator leaks, the A/C system loses refrigerant and stops cooling. This prevents the defrost/defog system from working properly, which can lead to poor visibility through the windshield in humid or rainy weather. In hot conditions, lack of cooling can also cause driver fatigue and heat stress, creating a safety risk for occupants. Confirmation of problem: Yes, the problem was confirmed by a Honda dealership after the condenser was already replaced under Honda’s extended warranty. Inspection by manufacturer/others: Yes, the vehicle was inspected by a Honda dealership. Honda corporate was contacted but declined to cover the evaporator, even though the condenser was covered under warranty due to a known defect in the A/C system. Warning lamps or symptoms: There were no warning lamps or dashboard messages. The only symptom was a loss of A/C cooling. After recharging the system, the A/C worked temporarily but will lose effectiveness again as refrigerant continues to leak. Summary: This is a premature failure of a critical climate control component that is widespread among 2016–2018 Honda Civics. Honda already extended warranty coverage for defective condensers in these models, but evaporator failures are also common and part of the same defective A/C system. The high cost of repair (quoted over $2,000) combined with the safety risks of poor windshield defogging and cabin overheating warrant NHTSA investigation and corrective action.