Typically every 105,000 miles (169,000 kilometers) under normal driving; the vehicle’s maintenance minder or owner's manual can adjust this timeframe, and replacing sooner may be necessary under severe conditions or if symptoms appear.
What the official schedule says
The 2018 CR-V, which uses Honda’s 1.5-liter turbocharged engine in most markets, follows a long-life spark plug replacement interval designed around iridium-tipped plugs. The summary below reflects the standard interval and related guidance.
- Spark plug replacement is recommended at about 105,000 miles (169,000 km) under normal driving conditions.
- Use OEM or equivalent iridium-tipped spark plugs and replace them with proper gapping and torque per Honda specifications.
- The Maintenance Minder system may prompt replacement sooner if operating conditions indicate wear or fault codes.
Intervals can vary by region and model year; always confirm with the owner's manual or a Honda dealer for your specific VIN.
Factors that can shorten or extend the interval
Several conditions can push the replacement date earlier or later than the standard interval. Understanding these factors helps owners plan maintenance and avoid unexpected failures.
- Severe driving conditions: frequent short trips, extreme temperatures, or heavy city driving can wear plugs faster.
- Engine condition: misfires, rough idle, or poor acceleration can indicate worn plugs or related ignition issues.
- Maintenance minder priority: the system adapts to driving patterns and may require earlier replacement in some cycles.
- Platinum/iridium plugs vs. copper: the 2018 CR-V generally uses iridium plugs with long service life; using lower-grade plugs can affect interval.
In practice, many owners find the 105,000-mile target holds for normal use, but real-world driving can vary widely.
Signs that plugs may need replacement sooner
Beyond the maintenance minder, watch for symptoms that suggest ignition issues or worn plugs, such as a rough idle, reduced fuel economy, hesitation, or a check engine light. If any of these occur, have the plugs inspected sooner rather than later.
Practical steps for replacement
When the time comes, follow Honda’s guidelines to ensure a proper job, and consider having the repair performed by a qualified technician to avoid cross-threading or improper gasket seating.
- Replace with Honda-approved iridium plugs or equivalents that meet OEM specifications.
- Ensure correct gap and torque per the service manual; re-gap if necessary after installation.
- Replace any ignition coils/seals if they show wear or damage; inspect the ignition system for signs of wear.
Sticking to OEM recommendations helps preserve engine performance and fuel efficiency over the CR-V’s lifespan.
Summary
For the 2018 Honda CR-V, the standard spark plug replacement interval is about 105,000 miles (169,000 km) under normal conditions, with the maintenance minder able to adjust the schedule. Severe driving, engine wear, or symptom onset can shorten the interval, so owners should monitor performance and consult their manual or dealer for personalized guidance. Regular maintenance and using the correct iridium plugs are key to longevity and reliability.