My "Maintenace Req'd" light came on in March. I continued to drive car @ 1000 miles (2 months) as there was no noticeable problem. Engine ran fine. Then on May 31, the check engine light, VSC lights came on, and I noticed car running rough and losing power, so I took it to the dealearship the same day.
They pull codes tell me 1 coil is bad; cylinder not firing, and causing unspent fuel in all 6 cylinders. Cost to replace the 1 coil, fuel injector clean, O2 sensor clean, emission and catalytic converter clean and replace all 6 plugs -- cost is $1600! Car only has 53,000 miles; oil changed regularly, etc.
This is my only problem -- but, wow! I though Toyota's were built to last! Dealer say it is rare for coil to fail -- but looking on this and other forums it appears they go out frequently. I considered replacing all coils -- adding another $600 to bill. Will wait for now. I know dealers are always high priced, but this seems crazy. Any one else have experience with coil outage and what did it cost you? Thanks.