Problem Reports

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

 Rookie

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.

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?

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.