Four spark plugs.
The 2010 Honda Insight uses a 1.3-liter inline-4 Atkinson-cycle engine as part of Honda's hybrid system. In a four-cylinder layout like this, each cylinder requires its own spark plug, so there are four spark plugs in total. The ignition system commonly uses individual ignition coils for each cylinder, matching modern coil-on-plug designs that support efficient combustion and smooth hybrid operation.
Engine layout and spark plug arrangement
The Insight's 1.3L engine is configured as a four-cylinder powerplant. Each cylinder requires a spark plug to ignite the air-fuel mixture, which results in a total of four spark plugs for the engine. This is standard for a four-cylinder configuration in contemporary Honda engines.
Maintenance considerations
Spark plugs in this engine wear over time and are replaced as part of routine maintenance. Owners should refer to the vehicle’s owner’s manual for the recommended replacement interval and the correct type of spark plugs. Using the right plugs and proper torque helps maintain efficiency, emissions performance, and reliability in the hybrid powertrain.
Summary
In summary, the 2010 Honda Insight has four spark plugs—one per cylinder in its four-cylinder engine. Adhering to Honda’s maintenance guidelines ensures optimal performance and reliability of the hybrid system.