A Guide to Spark Plugs for the 2015-2022 Honda Pilot
Keep your Pilot's V6 engine running smoothly with the right set of spark plugs.
- Stick with OEM brands NGK or Denso for the best performance and reliability in your Honda Pilot.
- The replacement interval is approximately 100,000 miles, but address symptoms like misfires immediately.
- Always check that the spark plug gap is set to 0.044 inches before installation.
- While DIY is possible, be prepared for the challenge of accessing the three rear spark plugs.
Symptoms of Failing Spark Plugs in Your Pilot
When spark plugs wear out, they can't create a strong enough spark. This leads to incomplete combustion in the engine. You might notice one or more of these signs:
🎬 Watch this video to see common symptoms of bad spark plugs.- Rough Idle: Your Pilot may shake or vibrate more than usual when stopped.
- Engine Misfires: The engine may hesitate, stumble, or lose power, especially during acceleration. This can trigger a flashing Check Engine Light.
- Reduced Fuel Economy: You may find yourself filling up the gas tank more often.
- Difficulty Starting: A weak spark can make the engine harder to start.
- Check Engine Light: A steady or flashing Check Engine Light can be caused by misfires. Common codes include P0300 (random misfire) and P0301 through P0306 🎬 See how a P0301 misfire code is diagnosed and fixed. (for specific cylinders).
Choosing the Right Aftermarket Spark Plugs
For the 2015-2022 Honda Pilot, the choice of spark plug brand is straightforward. Honda uses NGK and Denso as original equipment (OE) suppliers. This means buying an NGK or Denso Iridium plug from an auto parts store is often the same as buying the plug from a Honda dealership, just in a different box and at a lower price.
Brand Quality Tiers for Honda Pilot
| Tier | Brands | Assessment |
|---|---|---|
| OEM Equivalent (Best Choice) | NGK, Denso | These are the original equipment brands for Honda. Both NGK Laser Iridium and Denso Long Life Iridium plugs are considered top-tier and will provide factory performance and longevity. Many owners report finding a mix of NGK and Denso plugs from the factory. |
| Quality Aftermarket | Bosch, Champion | Bosch and Champion offer iridium spark plugs that are a viable alternative. While not the original equipment brand, their high-end iridium options are designed for long life and performance. |
| Standard/Budget | Autolite | Autolite provides iridium plugs that can be a cost-effective option. However, for Honda engines, most mechanics and experienced owners strongly recommend sticking with NGK or Denso for the best reliability and performance. |
Pro Tip: Always verify the spark plug gap before installation, even if the plugs are advertised as "pre-gapped." The correct gap for the 2015-2022 Honda Pilot is typically 0.044 inches. An incorrect gap can lead to poor performance and misfires.
Known Issues, TSBs, and Recalls
While the 2015-2022 Pilot generation is generally reliable, earlier models (2009-2013) were subject to a warranty extension (TSB 13-082) for spark plug fouling related to piston rings on cylinders 1-4. This issue caused misfire codes (P0301-P0304). While this specific TSB does not apply to the 2015-2022 models, it highlights that spark plug fouling can sometimes be a symptom of other engine issues. Additionally, a NHTSA investigation was opened for 2016-2020 Pilots regarding engine restart failures related to the auto start/stop system, though this is not directly a spark plug failure.
Cost of Replacing Spark Plugs on a 2015-2022 Honda Pilot
| Service | Estimated Cost |
|---|---|
| Aftermarket Spark Plugs (Set of 6) | $70 - $215 |
| Shop Labor | $140 - $250 |
| Total DIY Cost | $70 - $215 |
| Total Professional Replacement | $305 - $535 |
Frequently Asked Questions (FAQ)
When should I replace the spark plugs on my Honda Pilot?
The recommended replacement interval for the original iridium spark plugs is around 100,000 miles. However, you should replace them sooner if you experience any symptoms of failure.
Do I have to replace all six spark plugs at the same time?
Yes. Spark plugs wear at a similar rate. Replacing all of them at once ensures consistent performance and prevents you from having to repeat the job a few thousand miles later when the next old plug fails.
Is replacing the spark plugs on a V6 Pilot a DIY job?
Yes, it is a feasible DIY job for someone with basic mechanical skills and the right tools. The three spark plugs in the front of the engine are easy to access. The three in the rear, near the firewall, are more challenging and require patience, a swivel socket, and various extensions.
🎬 Follow this step-by-step guide to replace your Pilot's spark plugs.What is a spark plug 'gap' and why is it important?
The gap is the small space between the center and ground electrodes at the tip of the spark plug. The spark must jump this gap to ignite the fuel. If the gap is too wide or too narrow, it can cause misfires, poor fuel economy, and a rough idle. The correct gap for your Pilot is 0.044 inches.
Should I use anti-seize on the new spark plug threads?
This is a topic of debate. Major manufacturers like NGK often advise against it because their plugs have a special plating that prevents seizing. If you use anti-seize, you can easily over-torque the plug, which can damage it or the engine's cylinder head. If you do use it, apply only a very small amount to the threads and reduce the torque setting by about 20%.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12290-R9P-A01 12290-R71-L01 12290-R70-A01
Engine: 3.5L V6. Plug Type: Iridium. Quantity Required: 6. Spark Plug Gap: 0.044 in (1.1mm). Socket Size: 5/8" (16mm). Coil Pack Bolt Torque: ~7.4 ft-lbs. Spark Plug Torque: ~13 ft-lbs.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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