Parts for your 2021 Honda Cr-v-Spark plugs

2021 Honda CR‑V spark plugs — what they do and when to replace them

Spark plugs are absolutely relevant on the 2021 Honda CR‑V. The petrol 1.5‑litre VTEC Turbo engine uses iridium spark plugs, and even hybrid CR‑V variants (where offered) still rely on spark plugs in the petrol engine. This is backed by Honda’s 2021 CR‑V Owner’s Manual and Maintenance Minder system (which calls up spark plug replacement as a service sub‑code), as well as major plug catalogues from NGK and DENSO that list iridium part numbers for the L15B‑series engine. So yes — this model definitely runs spark plugs.

On a modern turbocharged, direct‑injected Honda, spark plugs do more than just “ignite the mix”. They’re critical to clean starts on cold mornings, smooth idle in traffic, strong mid‑range pull for overtakes, good fuel economy on long Kiwi and Aussie road trips, and keeping emissions in check. Iridium fine‑tip designs used by Honda deliver a strong, consistent spark while resisting wear under boost and high combustion pressures.

For servicing, the best guide is the Honda Maintenance Minder. When the relevant sub‑code appears (commonly associated with spark plug replacement), it’s time. In typical Australian and New Zealand use, many owners see this around the 100,000–120,000 km mark or several years in, but the Minder accounts for short trips, towing, and hot climates — so follow its cue rather than a fixed number.

When replacing, stick with OEM‑spec iridium plugs. Reputable equivalents commonly referenced for the 1.5T include NGK ILZKAR7B11/SILZKAR7B11 or DENSO FXLEH20. They’re pre‑gapped for the application, so avoid re‑gapping unless a Honda service bulletin specifically says otherwise. Fit them to a cool engine, use a torque wrench to the spec in Honda’s service info, and don’t apply anti‑seize (modern plugs are nickel‑plated and anti‑seize can lead to over‑tightening). Replace the full set at once.

While in there, a quick check of the coil boots and plug tubes pays off. Look for oil in the wells (a sign a rocker cover gasket is weeping), moisture or carbon tracking on the boots, and make sure everything is clean before coils go back on. A tiny smear of dielectric grease on the inside of each boot can help future removal.

• Signs your CR‑V may want new plugs: rough idle, harder starts, misfire under load, hesitation, poorer fuel use, or a check‑engine light for misfire.
• Keep the intake system healthy and use quality 95–98 RON fuel to help plugs live a long, happy life in turbo service.

Does a 2021 Honda CR‑V have spark plugs?

Yes. All 2021 CR‑V petrol models — including hybrids where available — use spark plugs. Honda’s Owner’s Manual and Maintenance Minder identify them as routine service items, and major plug manufacturers publish specific part numbers for this engine.

How often should spark plugs be replaced on a 2021 CR‑V in Australia or New Zealand?

Go by the Honda Maintenance Minder. Many owners see the spark plug service sub‑code roughly around 100,000–120,000 km, but the Minder adjusts for local driving and climate. If symptoms appear earlier, have them checked.

Which spark plugs fit the 2021 CR‑V 1.5T?

Use OEM‑equivalent iridium plugs. Common listings include NGK ILZKAR7B11 (also seen as SILZKAR7B11) and DENSO FXLEH20. Always confirm the exact spec against your VIN and follow Honda service procedures.