Denso SKJ20DR-M11S Iridium Spark Plug – Honda Civic 1.8 / CR-V 2.0 (R18/R20)

Denso SKJ20DR-M11S – Iridium Spark Plug for Honda Civic VIII / CR-V III / FR-V (R18, R20)

Denso SKJ20DR-M11S is an iridium spark plug designed for Honda petrol engines from the R-series, including R18 and R20. Iridium technology helps maintain a strong, stable spark for smooth idle, reliable cold starts and consistent performance over longer service intervals.

If your Honda starts running slightly rough at idle, feels weaker under load or fuel consumption increases, worn spark plugs are one of the first things worth checking. This plug is a popular match for Civic VIII 1.8 and CR-V III 2.0 applications.

Applications

• Honda Civic VIII (2006–2011) – 1.8 (R18A1, R18A2)
• Honda CR-V III (2007–2012) – 2.0 (R20A1, R20A2)
• Honda FR-V (2007–2009) – 1.8 (R18)

Key features

• Type: Iridium spark plug
• Manufacturer: Denso
• Quality: Made in Japan
• Helps support smooth idle, stable ignition and reliable cold starts

Engines

R18A1, R18A2, R20A1, R20A2

FAQ – Denso SKJ20DR-M11S

Can I replace only one spark plug?
It’s best to replace spark plugs as a complete set to keep all cylinders working evenly and reduce the risk of misfires.

Does it fit my exact model year?
Applications can vary by market and production year. The safest way is to confirm by VIN / catalogue or compare the marking with your current plug.

Is it suitable for R18 and R20 engines?
Yes – this plug is commonly used with Honda R18 and R20 engines listed above (Civic VIII 1.8, CR-V III 2.0, FR-V 1.8).