The 2019 Honda Insight uses a 1.5-liter inline-four hybrid powertrain that combines a gasoline engine with electric motor assist. It has four spark plugs—one for each cylinder—matching its four-cylinder layout.
Engine design and ignition system
The Insight relies on Honda's 1.5-liter Atkinson-cycle engine, paired with the hybrid system known as i-MMD. Power is delivered to the drivetrain through multiple modes, but the ignition setup remains straightforward: four separate spark plugs, one per cylinder, each served by its own coil in a coil-on-plug arrangement. This configuration supports reliable combustion across all four cylinders.
Spark plug count and configuration
Key facts about the spark plugs for this model are summarized below.
- Engine: 1.5-liter inline-four Atkinson-cycle
- Spark plugs: four total — one for each of the four cylinders
- Ignition system: coil-on-plug, with a separate ignition coil for each cylinder
- Recommended maintenance: spark plug replacement around 100,000 miles when using iridium or platinum plugs, per Honda's schedule
In short, the Insight's four-spark-plug arrangement aligns with its four-cylinder engine and modern ignition design.
Practical notes for owners
When performing maintenance, ensure you use the OEM-recommended spark plugs and follow the service schedule in the owner's manual. Ignition-related components—such as coils—also wear over time and should be checked if misfires or rough idle occurs.
Summary
The 2019 Honda Insight has four spark plugs in a four-cylinder 1.5-liter Atkinson-cycle engine. Each cylinder has its own spark plug and ignition coil, and replacement intervals are typically around 100,000 miles with appropriate iridium/platinum plugs, depending on the exact maintenance plan for your vehicle.