Misfire and/or Check Engine Light Due to Failed Ignition Coil on Toyota Avalon

Problem Description and Possible Solution

On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.

Problem Data
RepairPal Verified
Average mileage: 105,697 (16,666–346,000)
15 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010
106 people reported this problem
Viewing 1 - 20 of 68 comments
The first ignition coil located in the front went out around 98,000 miles, 8 months later another coil has gone out in the back of the engine. Just as others resported, the check engine light came on then the car started hesitating and jerking. The labor cost to get the ignition coil replaced is $500; the coil costs $110. The toyota dealer suggests I get all 3 ignition coils replaced in the rear of the engine to avoid future labor cost to pay for another failed coil; my total repair cost will be over $972 which includes a fuel gasket replacement. This is my first Toyota; I'm disappointed in the repair costs because I thought Toyotas were pretty repair cost free as long as you kept the maintenance up.
check engine light and VSC light on. Engine began to randomly shudder, ( missing )
I have had this problem once before and they replaced one of the ignition coils. However two months later the problem is now back and I need to figure out which one needs replacing given they are about $112 each. I know that maybe they all may need to be replaced but does anyone know if you can just replace one at a a time as they fail?
Engine light is on. Dealer says 2 of the coils are out, recommends changing them all since the others are soon to follow. What are these coils and why are they going out so soon. This is the 3rd major problem where it's costing me more than $1000 on repairs.
I have a 98' Camry with 255K, I change the oil, tires, battery and the car keeps running. At this point I'm planning on getting rid of the 06' Avalon and keeping the 98' Camry.
car started vibrating almost like having a flat tire, then would stop after slowing down. check engine light would start flashing. had a diagnosis done at toyota dealership and faulty ignition coil is the problem. going to attempt to fix it myself. we will see
Engine light on due to ignition coil failed again.
Around 40,000 miles two years ago, Engine light turned on. One of well known mechanic guy checked it and pointed out a failed coil and recommended me buying a coil from Toyota part shop and replaced it by myself. I did and OK.
Now, around 75,000 miles, one of coils failed again.
I bought it and replaced it easily because the failed coil located at front bank. cost $120, Avalon 2007.
PS. I could see only one failed code at the time engine light on but after driving half hour to go mechanic shop, all coils looked like fail by displaying on a diagnosis monitor. may cause by a computer error of Avalon itself.
Car had been hesitating then check engine light came on, took it to repair shop. This is the second time the ignition coils had to be replaced. The first time only had about 35,000 miles.
Engine Maintenance light on... Shop says I need an ignition coil. Total cost $217.00 labor/parts
Started with an O2 sensor at about 85000 then check engine light came on and was diagnosed as coil on #1 cylinder. Dealer wanted $500. to change the one and plenum gasket. I had it done at a Goodyear shop. Supplied my own parts because I used to own a Carquest Parts store and he changed 3 coils, plugs and plenum gasket for $160. Recommend change the back 3 coils and plugs while you are in there.
Local Mechanic replaced all 3 in the back and had to replace the plenium gaskets to take the plenium off to get to them. Very labor costly and expensive
Replaced one coil at the Toyota dealer about a year ago at around 65,000 miles. Now check engine light is on and car is shaking (at 72,000 miles). Code idicated another failed ignition coil. I plan on changing all the coils and the spark plugs myself this time. This is a great driving, comfortable car, but the little things like this, cracks in the dashboard, fogged headlights, etc have me thinking this is my last Toyota.
I had my first ignition coil failure at 65000 miles on my 2009 Rav4 6 cylinder. Apparently this is a common problem. Replacement cost at the dealer was $400 for one coil. Toyota is not claiming any responsibility for the failure unless the vehicle is under warranty. Since one failed, I decided to replace all 6. I purchased a new set of coils from buyautoparts.com and replaced them myself. 5 months later one of the replacements failed and was replaced by buyautoparts at no charge minus labor. Meanwhile my vehicle sat in the garage for 3 days while I waited for the replacement part. 1 month later another failed. I am now in search of another set of coils that have been corrected. Besides the cost of the coils at $50 to $100+ each, installation is time consuming and expensive! It appears that overheating is the root cause for the failures. For starters I removed the upper, insulated, decorative engine cover in order to reduce heat stress to the coils. The problem I have now is finding new coils that have been modified to prevent premature failure. Toyota has a redesigned coil but how can anyone insure that the same problem will not recur. They have a lifetime warranty but labor exceeds the cost of the coils. Bottom line: I have been a Toyota buyer for 15 years but with this problem and three recalls for other issues, I will go somewhere else for my next purchase.
I have replaced all 6 coils over the past 2 years. I need to have #4 replaced yet again. It was relaced April 2012. I bought the car new...low low mileage have put too much money into it. I thought Toyota's ran forver with minimal mantaince. So dissappointed. This was my first Toyota and will be my last.
argh, this problem stinks, I personally had 2 in front go, easy enough fix but 95.00 a pop for the part alone. thats not even a toyota part but some off brand. At least it comes with a lifetime warranty. Now I have to do the #5 cylinder and it sucks. Im going to hit them all while Im at it, a real pain in the ass to get to. It seems like I have to take apart all kinds of crap. Thanks Toyota, this sucks.
yes, my first ignition coil went out at about 90,000 miles, than the second coil went out several months later. then last week at about 100,000 miles, my 3rd coil went out.
I had the check engine light come on so I took it in to my mechanic. He replaced the #1 coil thinking that would solve the problem. Next day the lite was back on. He then said he thought I had an electrical problem, so he recommended I take it to the dealer. The dealer said they "thought" the problem was in the #3 coil, but that they could not guarantee that #3 was the problem. So much for all of their so called "knowledge". Toyota priced out changing #3 to be half the price of changing them all, so I had them all changed out to the tune of over $700. I had already changed out #1 for $300. Now I have over $1000.00 wrapped up in ignition coil problems at only 50,000 miles. I had NEVER had this kind of expense at only 50,000 miles on ANY American car I ever owned. I purchased the Toyota with the thought that I would NOT have these kinds of problems. I was VERY diappointed. Other than that, the car was great until some guy decided to make an immediate left in front of me a couple of weeks ago. The car was totaled. I did buy a '12 Avalon Ltd. and like it. Hope I don't have the same problem with this one.
Ignition coil problem at around 52k and again now around 79k
Check Engine Light, VSC and Traction lights as well. This is the second occurrence (first at 35K), both times affecting at least one coil on the back of the engine. This time it was #1 and #5, don't remember last time. Replacing all six again, so I don't need to turn around and do it again soon. Repair bill in the $2K range both times! Toyota replacement parts used, no aftermarket. Although I have high mileage, these are highway miles for the most part. I don't commute in traffic, no stop and go stuff. This is an endemic issue with Toyota Avalon, apparently, and Toyota needs to recognize it, fix it, and compensate owners for it. An engine rebuild every 40 thousand miles is unreasonable.
Usually the traction light comes on, then the check engine, and then ---- the inevitable failure. Sometimes very quickly. I now have 171,000 miles and the first time 300, the 2nd time 300, for the rear plug --- OK for the front, 300, really!

So after that I change my own. Think twice on the rear bank. The manifold has to come off, and there are two bolts on brackets on the rear that are impossible. You have to take off the cowl pieces and wipers to get to it. But then it's pretty straight forward. Replace the gaskets on the manifold on the way out, and you might as well replace the sensor. It's a big job not for the average U-wrench it.

As luck would have it my front bank #3 went this week. So I'll replace the remaining two and we'll see.

So far the seat upright tac welds failed, I'm a big boy. The coils, and the condensor for the A/C, and that's it folks. Brakes front at 110K miles, rears at 150K. Don't use aftermarket rotors. I got 60K on the O'Reilly life time replacements, and --- apparently their life is up. Pads still fine but the rotors warped.