How much does it cost to replace ignition coils on a Toyota Avalon?

Ignition coil replacement costs on a Toyota Avalon depend on how many coils are replaced, the type of parts used, and local labor rates. In general, replacing a single coil typically runs about $120 to $300, while replacing all six coils often falls in the $600 to $1,200 range. This article breaks down the typical costs and the factors that drive them.

Factors that influence the price

The Avalon uses coil-on-plug ignition with six individual coils, one per cylinder. The total bill depends on whether you replace just one failing coil or all six, the type of coil chosen (aftermarket vs OEM/brand), labor rates at your shop, and whether spark plugs are replaced at the same time. Diagnostic fees can also affect the final price if the cause isn’t clearly diagnosed as a coil problem.

Single-coil replacement costs

Costs for replacing a single ignition coil on a Toyota Avalon are broken down below. This scenario is common when only one cylinder is misfiring and the others are functioning normally.

• Parts: aftermarket coils typically $40–$90 each; OEM coils commonly $70–$120 each.


• Labor: about 0.5–1 hour at a shop rate of roughly $80–$150 per hour.


• Total: roughly $120–$270 with aftermarket parts; about $150–$320 with OEM parts (before tax).

Bottom line: The total for a single-coil replacement generally falls in the $120–$320 range, depending on part choice and local labor rates. Diagnostic fees may apply if the issue isn’t clearly a coil problem.

All-six coils replacement costs

Replacing all six coils is common for vehicles with multiple coil failures or to prevent future issues on higher-mileage Avalons.

• Parts: six aftermarket coils typically $240–$600 total; six OEM coils typically $420–$720 total.


• Labor: about 2–4 hours at a shop rate of roughly $80–$150 per hour, yielding $160–$600.


• Total: roughly $400–$1,200 with aftermarket parts; about $580–$1,320 with OEM parts (before tax).

Note: If you replace spark plugs at the same time, expect an additional cost for plugs and extra labor. Plugs run roughly $12–$25 each aftermarket or $20–$40 each OEM, depending on brand.

Should you replace all coils at once?

For older Avalons or vehicles showing multiple coil-related symptoms, replacing all six at once can be cost-effective in the long run by reducing repeated labor charges and ensuring uniform performance. If several coils are already failing or the spark plugs are due for replacement, tackling both tasks in one visit is common.

DIY viability

Coil replacement can be within reach for a competent DIYer with the right tools and a service manual, but it requires care to avoid wiring damage and to reconnect components correctly. If you’re not comfortable with tasks like disconnecting wiring connectors and torquing bolts to spec, hiring a professional is advisable.

What to ask a shop

Get a written estimate that clearly lists parts (coil type and whether plugs are included), labor, any diagnostic charges, and the warranty on parts and labor. If you plan to provide parts yourself, confirm the shop’s policy on labor for customer-supplied components.

Summary

For a Toyota Avalon, replacing a single ignition coil typically costs about $120–$320, while replacing all six coils generally runs about $600–$1,200 with aftermarket parts, or $580–$1,320 with OEM parts. Costs vary by region, shop, and whether you replace spark plugs at the same time. Compare quotes from independent shops and dealerships, and consider the long-term value of replacing multiple coils at once to reduce future service visits.

How much does it cost to replace ignition coils on a 2005 Toyota Avalon?

The range of prices of Ignition Coils for the 2005 Toyota Avalon goes from $72.99 up to $385.99 for the most premium parts.

How much does a mechanic charge to change an ignition coil?

If you have a faulty coil, it's going to cost you between $200 and $300 on average to replace it, not to mention the frustration and downtime you'll experience.

What year to stay away from Toyota Avalon?

Years to potentially avoid for the Toyota Avalon include 2005–2007, which had common issues like oil leaks and dashboard cracking, and the 2013-2014 models, due to a high number of Technical Service Bulletins (TSBs) and problems like the pre-collision system causing unexpected braking and a risk of the ball joint detaching. The 2011 model year is also mentioned for its high number of owner-reported issues. 
Years to be cautious with

• 2005-2007: This third-generation group is associated with several problems, including: 
  • Engine oil leaks and excessive oil consumption 
  • Cracked dashboards 
  • Faulty VVTi oil lines that can cause engine damage 
  • Transmission hesitations 
• 2011: Known for significant peeling paint on the roof. 
• 2013-2014: These models from the fourth generation had a notable number of issues, making them a riskier purchase. 
  • The 2013 model had a high number of TSBs and was described as a "big risk" by some users, according to this YouTube video. 
  • The 2014 model year is associated with issues like:
    • Unexpected braking due to the pre-collision system 
    • A risk of the ball joint detaching from the lower control arm 
    • Potential fuel leaks 
• 2014: Owners reported issues with the suspension and touchscreen, including poor Bluetooth connectivity. 

Why these years are a concern

• Fourth generation redesign: The 2013-2018 redesign made some significant changes, and the initial years (2013-2014) struggled with settling on a reliable platform, resulting in numerous recalls, TSBs, and reported issues. The 2015 model year is noted for having far fewer issues, according to this YouTube video. 
• Common issues: Many of the issues reported across the third and fourth generations were related to minor component failures, such as the rear sunshade or door lock actuators, but some were more serious, like unexpected braking or potential fuel leaks. 

Can I still drive with a bad ignition coil?

No, you should not drive with a bad ignition coil, as it can lead to further and more expensive damage to your engine and catalytic converter. While you might be able to drive short distances, it is unsafe because the car will perform poorly with misfires, rough idling, and poor acceleration, and you risk a breakdown. 
Dangers of driving with a bad ignition coil

• Catalytic converter damage: Unburned fuel can enter the exhaust, where it can ignite in the hot catalytic converter, causing it to overheat and fail, notes this Quora post and this YouTube video. 
• Engine component wear: You can damage other engine parts like the cylinder walls, rings, and pistons because fuel can wash away the lubricating oil. The engine oil can also become contaminated with fuel, which reduces its ability to lubricate and protect the engine. 
• Poor performance: The vehicle will likely experience rough idling, misfiring, poor acceleration, and decreased fuel efficiency. 
• Risk of breakdown: A failing coil can lead to a complete engine failure, and if this happens while you are driving, it can be dangerous and leave you stranded. 
• Damage to other parts: A faulty ignition coil can put extra strain on other engine components and trigger issues with oxygen sensors. 

This video demonstrates what happens when you drive with a bad ignition coil, including catalytic converter damage: 1mAuto Repair GuysYouTube · Oct 6, 2022
What to do instead

• Get it diagnosed immediately: Take your car to a mechanic as soon as you notice symptoms like a check engine light, misfiring, or trouble starting. 
• Consider replacing all coils: If you have a vehicle with a coil-on-plug system, it may be more cost-effective in the long run to replace all the coils at once, especially if other coils are showing signs of age, says Coastwide Service Centre.