What does National IV EFI mean?

[DelChloe]

National IV EFI means that in order to meet the National IV standard, electronic fuel injection technology is basically required. The relevant introduction of the National IV standard is as follows: Introduction to National IV Standard: The National IV standard is an environmental protection standard formulated with reference to the Euro III standard. The higher the number, the stricter the standard, meaning that the higher the number, the relatively lower the pollution from exhaust emissions. Domestic vehicles produced between 2005 and 2008 were mostly National III vehicles. The so-called National III standard refers to China's third-stage vehicle emission standard, equivalent to the Euro III emission standard. Impact of vehicles not meeting the National IV standard: When a vehicle fails to meet the National IV standard due to factors such as fuel quality, the OBD system will automatically issue an alert and switch to the system default mode. The engine will not function properly, and the vehicle can only be inspected and maintained at authorized service stations. Moreover, the OBD system cannot be modified after the vehicle leaves the factory.