Four spark plugs.
The 2010 Honda Insight uses a four-cylinder gasoline engine paired with Honda’s Hybrid Synergy Drive. Because it employs a four-cylinder layout, there are four spark plugs—one for each cylinder. The ignition system is coil-on-plug, meaning each cylinder has its own ignition coil located directly above its spark plug. When replacing plugs, follow the owner’s manual guidance on the correct plug type and gap, and adhere to the recommended maintenance intervals.
Spark plug count and engine layout
Key facts about how the spark plugs fit into the Insight’s engine design and why there are four of them.
- Engine configuration: inline-4 with 4 cylinders
- Spark plug count: 4
- Ignition system: coil-on-plug (one ignition coil per cylinder)
- Replacement guidance: use the plug type and gap specified in the owner’s manual (often iridium or platinum for newer engines) and follow the official maintenance intervals
Understanding these points helps ensure proper maintenance and parts compatibility for the vehicle.
Maintenance notes
When planning spark plug service, consult the owner’s manual or a qualified technician for the exact interval and part recommendations. Hybrid systems and modern ignition setups may influence the recommended replacement schedule and torque specifications, so following official guidance is important.
Summary: The 2010 Honda Insight has four spark plugs—one per cylinder in its four-cylinder 1.3-liter engine. The coil-on-plug ignition system keeps maintenance straightforward, with replacement parts and intervals specified in the owner's manual or by a Honda service professional.