The typical interval for most Honda Ridgeline models with the 3.5-liter V6 is about 105,000 miles under normal driving. In severe service—such as frequent towing, hot climates, or dusty conditions—planning for replacement sooner, around 60,000 miles, is advisable. Always check your exact model year and engine in the owner's manual or with a Honda dealer to confirm the recommended interval.
What follows is a closer look at how this guidance applies across Ridgeline generations, common warning signs that plugs may be worn, and practical tips for planning a replacement.
Quick guide to spark plug replacement intervals
It helps to have a concise reference for when to schedule a plug change. The Ridgeline generally follows the long-life plug guidance, with a shorter window in demanding use cases.
- Normal driving: replace around 105,000 miles (about 169,000 km).
- Severe service: replace around 60,000 miles (about 97,000 km).
- Always verify the exact interval for your year and engine in the owner’s manual or through a Honda service advisor.
In practice, owners who tow regularly or operate in extreme heat or dusty environments should consider scheduling plugs earlier, while those in light use may stick closer to the 105,000-mile target.
Signs that your spark plugs may need replacement
Knowing the symptoms can help you catch wear before it leads to misfires or reduced performance. If you notice any of the following, it may be time to inspect or replace the plugs.
- Rough idle or misfiring, especially when the engine is cold
- Noticeable loss of acceleration or power
- Decreased fuel economy
- Difficulty starting or extended cranking
- Engine knocking or pinging under load
- Check Engine Light with misfire or fuel-related codes
If you’re experiencing these symptoms, have a mechanic diagnose the issue to rule out ignition or fuel system problems beyond the plugs.
Generation-by-generation notes
Gen 1 (2006–2014 Ridgeline)
For the first-generation Ridgeline, Honda's service schedule commonly cites spark plug replacement around 105,000 miles for the 3.5-liter V6. The plugs are designed to last a long service life under normal conditions, but towing, heavy loads, or extreme climates can shift emphasis toward earlier replacement. Always confirm with the specific model year’s owner’s manual or a dealership bulletin, as schedules can vary slightly by year and trim.
Gen 2 (2017–present Ridgeline)
Second-generation Ridgelines continue to follow the long-life plug philosophy, with a typical replacement interval near 105,000 miles for the 3.5-liter V6. As with Gen 1, severe service and regional conditions can shorten the interval, so refer to the manual for your exact configuration and consider a check sooner if you tow regularly or operate in challenging environments.
What to know about replacing spark plugs
Whether you’re counting miles or planning a service visit, a few best practices help ensure a reliable replacement and long plug life.
- Verify the correct plug type for your engine year (iridium or platinum plugs are typical for modern Ridgelines).
- Gather the right tools and a torque-spec reference from the owner’s manual or a service manual.
- Allow the engine to cool before service, disconnect the battery, and carefully remove coil packs to access the plugs.
- Install new plugs and torque them to the OEM specification; avoid over-tightening to prevent threads damage.
- Reassemble components, clear any codes if needed, and reset the maintenance reminder if your vehicle requires it.
If you’re not comfortable performing the replacement, a qualified technician can complete the service and verify there are no related ignition or fuel-system issues.
Summary
For most Honda Ridgeline owners, the standard spark plug replacement interval is about 105,000 miles under normal conditions, with earlier plans (around 60,000 miles) recommended for severe service. Always consult your specific model year’s owner's manual to confirm the exact interval and plug type. Stay alert for symptoms like rough idle, reduced power, or poor fuel economy, which can signal worn plugs. When in doubt, a professional inspection can help determine the right replacement timing and ensure a proper installation that keeps your Ridgeline running smoothly.