Toyota Avalon Spark Plug Replacement Guide for 2013-2022 Models
Keep your Avalon's V6 or Hybrid engine running like new by choosing the right spark plugs.
- Only use Iridium-type spark plugs; Denso and NGK are the OEM suppliers and are highly recommended.
- Be aware of the high difficulty and labor cost for V6 models due to the rear plugs being under the intake manifold.
- The correct replacement interval is long, typically 80,000-120,000 miles, so check your service history before replacing.
- Purchase from reputable retailers to avoid common counterfeit Denso and NGK plugs.
Symptoms of Failing Spark Plugs in a Toyota Avalon
When your Avalon's spark plugs wear out, they can't create a strong enough spark to ignite the fuel properly. This can lead to several noticeable engine problems. You should consider replacing your spark plugs if you experience any of the following issues:
- Rough Idle: Your engine may shake or vibrate more than usual when you're stopped at a light.
- Poor Acceleration: The car may feel sluggish or slow to respond when you press the gas pedal.
- Reduced Fuel Economy: You might notice you're visiting the gas station more often because worn plugs can cause incomplete fuel combustion.
- Difficulty Starting: A weak spark can make it harder for the engine to turn over, especially when cold.
- Check Engine Light: A failing spark plug is a common cause of an engine misfire, which will trigger the check engine light. 🎬 Watch: Common signs and symptoms of bad spark plugs You may see codes like P0300 (random misfire) or P0301-P0306 for specific cylinders.
V6 Engine: A Tale of Two Jobs
If your Avalon has the 3.5L V6 engine, be aware that replacing the spark plugs is two different jobs in one. The front three plugs (Bank 2) are easily accessible and simple to change. However, the rear three plugs (Bank 1) are located underneath the upper intake manifold. This manifold must be removed to access them, which makes the job significantly more difficult and time-consuming. This is the main reason 🎬 See this walkthrough for changing V6 engine spark plugs professional labor costs are high. The 4-cylinder hybrid models do not have this issue, as all plugs are easy to access.
🎬 Watch: Step-by-step spark plug replacement for Hybrid modelsChoosing the Right Aftermarket Spark Plugs
For the 2013-2022 Toyota Avalon, the original equipment (OEM) spark plugs are high-quality Iridium-tipped plugs made by either Denso or NGK. These plugs are designed for a long service life, typically 80,000 to 120,000 miles. When shopping for aftermarket replacements, it is highly recommended to stick with these two brands.
Brand Quality Tiers
- Tier 1 (OEM Equivalent): Denso & NGK. These are the original suppliers for Toyota. An aftermarket Denso or NGK Iridium plug is often the exact same part you'd get from a Toyota dealer, just in a different box. They offer the best combination of performance, longevity, and compatibility. For guaranteed performance, choose a Denso Iridium Long-Life or NGK Laser Iridium model specified for your Avalon.
- Tier 2 (Reputable Alternatives): Bosch, Autolite, Champion. These brands also produce Iridium spark plugs that are compatible with the Avalon. While they are established manufacturers, Denso and NGK are consistently recommended for Toyota engines due to their OEM status. They can be a good option if the Tier 1 brands are not available, but ensure you are buying the correct Iridium version.
Pro Tip: Avoid basic copper or single platinum plugs. Your Avalon's ignition system is designed for long-life Iridium plugs. Using a lower-grade plug will result in poor performance and a much shorter service life, requiring you to change them more frequently.
Warning: Counterfeit Spark Plugs
Be extremely cautious of counterfeit Denso and NGK spark plugs sold on sites like eBay and Amazon. These fakes are poorly made and can cause engine misfires or even damage. To avoid them, purchase from a reputable auto parts retailer.
Cost of Spark Plug Replacement (2013-2022 Toyota Avalon)
| Item | Estimated Cost |
|---|---|
| Aftermarket Spark Plugs (Set of 4 or 6) | $43 - $115 |
| Shop Labor (V6 Engine) | $247 - $400+ |
| Total Professional Job (V6) | $290 - $652+ |
Note: Labor costs for the 4-cylinder hybrid engine will be significantly lower due to easier access. Costs are estimates and will vary by location and shop.
Frequently Asked Questions
When should I replace the spark plugs on my Toyota Avalon?
For the 2013-2022 models, which use Iridium plugs, the typical replacement interval is between 80,000 and 120,000 miles. However, you should always check your owner's manual for the specific maintenance schedule for your vehicle's year and engine type.
Is it difficult to replace the spark plugs myself?
It depends on your engine. For the 4-cylinder hybrid, it is a relatively easy DIY job. For the 3.5L V6, the front three plugs are easy, but the rear three are very difficult for a beginner because the intake manifold must be removed. This job requires more tools, time, and mechanical experience.
Do I need to gap the spark plugs for my Avalon?
Most premium Iridium spark plugs from Denso and NGK come pre-gapped for your specific vehicle. It is a good practice to verify the gap with a feeler gauge before installation, but you should not attempt to adjust the gap on a fine-wire Iridium plug, as the delicate electrode can be easily damaged.
Should I replace the ignition coils with the spark plugs?
This is generally not necessary. Toyota ignition coils are very durable and should only be replaced if they have failed, which would typically be indicated by a specific misfire code (e.g., P0351). Unlike spark plugs, ignition coils are not a routine maintenance item.
Are there any recalls for my Avalon's spark plugs?
As of early 2026, there are no specific NHTSA recalls or Technical Service Bulletins (TSBs) directly related to spark plugs for the 2013-2022 Toyota Avalon. Always check the NHTSA website with your VIN for the most current recall information.
Helpful Videos
Technical Specifications
OEM Part Numbers: 90919-01247 90919-01259 90919-01263 90919-A1001
The 2013-2022 Toyota Avalon requires long-life Iridium spark plugs. Common OEM-equivalent parts include Denso FK20HR11 and NGK Laser Iridium models. The required spark plug gap is typically pre-set from the factory.
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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.
- Toyota Avalon:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of Failing Spark Plugs in a Toyota Avalon
- V6 Engine: A Tale of Two Jobs
- Choosing the Right Aftermarket Spark Plugs
- Brand Quality Tiers
- Warning: Counterfeit Spark Plugs
- Cost of Spark Plug Replacement (2013-2022 Toyota Avalon)
- Frequently Asked Questions
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