Well, I got 4000 miles on mine. I just got the same symptom, diagnosis, and fix. Because of your post, I'd saved the old coils, even kept one under the seat with the scanner and tools. I just contacted the seller via eBay and will see what happens. To all others, you may want to avoid this seller.Mark wrote: ↑Fri May 28, 2021 3:05 pm Welp, the first of the new coils failed this morning after 1,060 miles. It started missing shortly after I left the house and threw a CEL so I turned back and checked and sure enough Cyl 1 coil failure. Fortunately I hadn't taken the trash from the garage out and was able to dig the old ones out and replaced the bad one. I cleared the code and it started right up and ran smooth. I'll contact the seller and hopefully can get a replacement or refund.
I never heard back after two emails via eBay. I found a couple of reports on very convincing counterfeit coils. Lesson learned--if the deal looks too good to be true, it is.
I could see the four I bought were heading that way when two failed in 5000 miles. Since I'm not the primary driver, and the car was about to go on a 1000 mile trip without me, I didn't want to risk third and fourth failures. I'm glad I kept the originals. They're still working just fine, about 5000 miles after I took them out of the trash. "Once bitten, twice shy," and now I'm nervous about any preventive maintenance of electronics. I believe I will leave those old ones in until one fails. I've learned the car can still be driven with one failure, at least.Mark wrote: ↑Mon Dec 06, 2021 4:18 pm Drove to the grocery store this afternoon, car was running just fine, about a 4.5 mile trip. Came out 15 minutes later and started it up, very rough idle. Wasn't sure if it was a miss or not, but suspected it probably was. I have my code reader in the car, but it's 20º here today with a 15-20 mph wind, so I decided to drive home and check it in the garage. Sure enough P0303, the last of the Florida coils finally went. A smarter person than me might have just replaced #3 when #2 died, but I'm stubborn.
So all 4 of the coils have failed now, but the one replacement from the original dealer is still fine. So far anyway. The other three were also purchased on Ebay, and all of them came in Toyota boxes and "Denso" and the part number molded into the plastic.
The replacement coil from the original seller failed yesterday. So that's five bad coils now from that dealer. I hope I have better luck with the ones from other sellers, but also very glad that I didn't toss the originals.