Most Honda Insight models use four spark plugs in the gasoline engine, aligning with a four-cylinder configuration in the latest versions. A notable exception is the original, first-generation Insight (1999–2006), which used a three-cylinder engine and therefore had three spark plugs.
Spark plugs by generation
Here is a quick generation-by-generation breakdown of spark plug counts for the Honda Insight:
- First generation (1999–2006): 3 spark plugs (three-cylinder engine).
- Second generation (2009–2014): 4 spark plugs (four-cylinder engine).
- Current generation (2019–present): 4 spark plugs (four-cylinder engine).
In short, spark plug count generally tracks the number of engine cylinders. Modern Insights with four-cylinder gasoline engines use four spark plugs, while the original three-cylinder model used three.
Summary
The number of spark plugs in a Honda Insight depends on generation: three for the early three-cylinder model (1999–2006) and four for all later four-cylinder versions (2009–2014 and 2019–present).