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 Camry Ignition Coil May Fail After 100,000 Miles
Toyota Camry Problem
Average Mileage: 123,820 mi (13,300 mi - 200,000 mi)
Do not pay a mechanic to replace these coils, it is two nuts and one bolt to do it yourself. Remove the plastic cover over your engine block (where you put oil in the engine, it is two 10 mm nuts), underneath you will find your coils, either four or six depending on whether or not your engine is 4 or 6 cylinder. The bolt in the coil is 10 mm also, as you look at the coils they are numbered from left to right, #1 coil is all the way left if you are facing the engine. Unplug the wire harness from the back of the coil, pull up on it and it pops right out (your spark plugs are underneath it FYI if you want to change those yourself also, one plug under each coil).
So with a 10 mm wrench, about $100 for the part and 5 minutes of your time you can do this yourself. Sorry to all of those that were fleeced by mechanics. $300...sheesh!
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, 144,000 mi
Check enging light started flashing, car started to shake just a little as if it was going to shut down. Smoke coming out the tail pipe, and won't pick up speed.
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, 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, 1998 Toyota Camry, 55,000 mi
The car had previously been serviced 3000 miles before, and this is second time the check engine light went on. The OBO device showed the code problem as P0300, P0302, P0303. The car is not driven that much, so it was suspected that maybe the gas in the car was gummy, or caused internal parts to be clogged.
Previously, the spark plugs had been replaced, as well as the spark plug wires.(@ 3000 miles ago)
Mechanic indicated that upon removal of the sparkplugs, cylinder # 3 spark plug was dirty and burned and ignition coil looked bad. This is after 3000 miles of driving. So he recommended replacement of the ignition coil. I do have to say that the car is 15 years old, so at that age, I can see that a lot of the car's parts are beginning to fail as they probably have a lot of dirt on them, and if they are plastic, probably the age and heat in the car is means they crack etc.
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.
Visitor, 2002 Toyota Camry
Misfire in cylinder 2 & 3 causing p0302 p0303 also a random misfire p0300 I do have high mileage 187k
Visitor, 2006 Toyota Camry, 144,000 mi
I just purchased the 06 Camry about 2 months ago. The check engine light came on - dealership took it to Toyota and apparently just had it reset. It came back on a week later. I took it to Toyota myself (also to see what the prior code was). Supposedly the prior code had something to do with the fuel mixture and the code I had the 2nd go around was an ignition coil. It was one of the "back" coils which they said required a lot of labor to get to - they suggested I replace the plugs at the same time to avoid the labor to do that at a later date.) $500 bill. The check engine light still comes on every few days (normally while idling) after a day or two it resets. The only saving grace to that $500 bill is that they cracked my windshield while replacing the ignition coil. The windshield had a tiny chip in it I hadnt noticed when I purchased the car - so at least i got a whole new windshield ($288) out of the $500 ignition coil repair bill. NOW if I could just figure out why the check engine light comes on when Idling!
Visitor, 2007 Toyota Camry, 125,000 mi
I have had multiple failures of the ignition coils since I've owned this car brand new in 2006.