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.
Car Problem Reports
Toyota Camry Ignition Coil May Fail After 100,000 Miles
Toyota Camry Problem
Average Mileage: 120,042 mi (13,300 mi - 175,000 mi)
Visitor, 2002 Toyota Camry, 167,000 mi
Car started to skip and use alot of gas, diagnosis check revealed it needed ignition coil replaced and mass air flow sensor. Solved some of the skipping, but has not really fix the problem.
I have had all the ignition coils replaced twice and some three times in the last two years and am continuing to still have problems. The check engine light will come on and it will die without notice or will run rough. Each time is taken to the mechanic it is the ignition coils and usually only one cylinder each time.
Visitor, 2007 Toyota Camry, 115,000 mi
Visitor, 2007 Toyota Camry, 75,000 mi
So far I've had 2 coils replaced and now it's only about 2 months later I'm getting another reading that another coil has failed. Never had this problem with any of the other cars I've ever owned for over 30 yrs. Back to the dealership tomorrow and feel they should fix this problem once and for all at their expense. If these coils are defective, then Toyota should foot the bill!
Visitor, 2003 Toyota Camry, 13,300 mi
REPLACE ONE COIL AND TWO WEEKS LATER ANOTHER ONE FAILED. REPLACE THE REST OF THE COILS AND ITS ALL GOOD NOW
Visitor, 2003 Toyota Camry, 150,000 mi
One of four coil packs failed. Replaced w/ new, problem solved.