The 2015 Honda Civic has four spark plugs.
Across its three main engine configurations—1.8L inline-4, 2.4L inline-4 in the Si, and the hybrid 1.5L inline-4—the Civic uses one spark plug per cylinder. That means four plugs in total for every version.
Engine options and spark plug count
The following breakdown covers the 2015 Civic's common engines and confirms the plug count for each. Use this as a quick reference if you're shopping for maintenance or parts.
- 1.8L i-VTEC inline-4 (LX, EX, EX-L) – 4 spark plugs
- 2.4L i-VTEC inline-4 (Si) – 4 spark plugs
- 1.5L Hybrid i-VTEC inline-4 (Hybrid models) – 4 spark plugs
In all variants, mechanics replace or inspect four plugs when servicing the ignition system or performing a tune-up. Always verify with your owner's manual or a dealer if you’re unsure which engine your specific trim uses.
Why the count matters
Knowing the exact number helps with scheduling maintenance, ordering the right parts, and avoiding unnecessary work during a tune-up. It also affects service intervals and potential misfires in different driving conditions.
Maintenance tips
When replacing spark plugs, ensure you use the correct heat range and gap for your engine. For the 2015 Civic, consult Honda's guidelines or a trusted technician for the right type and torque specification.
Summary: The 2015 Honda Civic uses four spark plugs across all engine variants—one per cylinder—making it four plugs in total. This consistency simplifies maintenance for owners across LX/EX/EX-L, Si, and Hybrid trims.
How many spark plugs are in a Honda Civic?
In this video we will show you how to replace your vehicle's spark plugs on this Honda Civic you'll have four of these located underneath your ignition coils across the top of your engine.
What kills spark plugs quickly?
Pre-ignition can lead to heat building up in the combustion chamber causing the spark plugs to fail. In addition, if the cooling system isn't functioning correctly, it can cause the engine and spark plugs to overheat. This overheating can lead to the spark plug's electrode wearing out faster.
How often should spark plugs be changed on a 2015 Honda Civic?
about every 30,000 miles
To keep your Honda vehicle's ignition system working its best, experts recommend changing your spark plugs about every 30,000 miles.
How much do spark plugs cost for a 2015 Honda Civic?
The average price for a 2015 Honda Civic Spark Plug at Advance Auto Parts is around $14.10, with a range that starts at $2.99 and goes up to $66.99. With 38 options in stock from 7 trusted brands, finding the right fit is easy.