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.Google+
Car Problem Reports
Toyota Avalon Ignition Coil May Fail After 100,000 Miles
Toyota Avalon Problem
Average Mileage: 105,958 mi (16,666 mi - 346,000 mi)
Visitor, 2007 Toyota Avalon, 104,000 mi
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.
Visitor, 2006 Toyota Avalon, 100,000 mi
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.
Visitor, 2006 Toyota Avalon, 89,000 mi
check engine light and VSC light on. Engine began to randomly shudder, ( missing )
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
Visitor, 2007 Toyota Avalon, 75,000 mi
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.
Visitor, 2006 Toyota Avalon
Engine Maintenance light on... Shop says I need an ignition coil. Total cost $217.00 labor/parts
Visitor, 2006 Toyota Avalon, 97,955 mi
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
Visitor, 1996 Toyota Avalon, 49,559 mi
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.
Visitor, 1996 Toyota Avalon, 87,000 mi
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.
Visitor, 1999 Toyota Avalon, 90,000 mi
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.