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repeated coil failure in 2000 lexus es 300

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Old 12-25-11, 11:50 AM   #1
shoover
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Default repeated coil failure in 2000 lexus es 300

greetings:

I replace all 6 original coils with aftermarket coils once the originals started failing. Now, two of these aftermarket coils from Orielly's have failed within a few months of installing them and i am fearful the other four new coils will follow suit.
I should also note that all of the 6 new spark plugs that were installed at a toyota dealership at 105,000 miles only last till 120,000 miles when all six plugs were replace during one of tyhe coil replacement visits. these were $10 spark plugs that are designed for the car which only last 15,000 miles! why such a short life?

is it common knowledge that only toyota brand coils should be used or am i just experiencing some bad luck with these aftermarket coils?

I have received refunds from the two $60 coils that have went bad because there is a 1 year warranty... if the other start failing, should i take the other four back and replace all 6 with the toyota brand coils? about $110/per at dealership.

Can you buy original coils online for cheaper??

any advice you can provided is much appreciated.
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Last edited by shoover; 12-27-11 at 08:40 AM..
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Old 12-25-11, 12:35 PM   #2
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Quote:
Originally Posted by shoover View Post
greetings:

I replace all 6 original coils with aftermarket coils once the originals started failing. Now, two of these aftermarket coils from Orielly's have failed within a few months of installing them and i am fearful the other four new coils will follow suit.

is it common knowledge that only toyota brand coils should be used or am i just experiencing some bad luck with these aftermarket coils?

I have received refunds from the two $60 coils that have went bad because there is a 1 year warranty... if the other start failing, should i take the other four back and replace all 6 with the toyota brand coils? about $110/per

any advice you can provided is much appreciated.
If your budget permits, than return all the coils and purchase 6 OE Lexus coils. If your budget is tight than replace the 3 rear coils with OE Lexus coils and te front ones with the aftermarket ones.

At least the front ones are easy to get to should they fail prematurely

Last edited by PFB; 12-25-11 at 10:05 PM..
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Old 12-25-11, 01:39 PM   #3
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Am I missing something? There are only 3 ignition coils on the 1MZ-FE, the rear cylinders run off of the front ones through spark plug wires.
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Old 12-25-11, 02:32 PM   #4
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Am I missing something? There are only 3 ignition coils on the 1MZ-FE, the rear cylinders run off of the front ones through spark plug wires.
There are no spark plug wires. One coil per plug. Three in front (easy), three in back (harder)
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Old 12-25-11, 05:46 PM   #5
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There are no spark plug wires. One coil per plug. Three in front (easy), three in back (harder)
Did they do that when they added VVT-i? My 98 doesn't have coils in the back.
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Old 12-25-11, 09:47 PM   #6
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The 1MZ was wierd when it came to coils. They went from 6 to 3 then with VVTi, I think back to 6 again.

I say just get used OEM ones. I have 167k miles on mine and no issues, and you should be able to get them pretty cheap too.
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Old 12-26-11, 01:08 AM   #7
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The OE coils can last a very long time -- Why did you replace them all? My oldest Lexus a 2000 has over 225k on it and four of the coils are original.

You replace them when they fail -- the toyota coils are not like some VW coils that had a plastic case problem ........ with those you replace all the same production tun.

I have used aftermarket coils with no problems on my Lexus.
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Old 12-26-11, 06:09 AM   #8
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The 1MZ was wierd when it came to coils. They went from 6 to 3 then with VVTi, I think back to 6 again.

.
I have a 99 with VVt-i. Mine has 6 coils. Wasn't the 99 the first year with VVT-i?
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Old 12-26-11, 07:10 AM   #9
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^ Yes, I think so.
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Old 12-27-11, 05:20 AM   #10
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I had a coil failure on my 2000 ES 300 about a month ago and decided to go to the salvage yard and get a pair for $25 each, best money I ever spent
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Old 12-27-11, 06:29 AM   #11
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Coils in these engines do last. I lost one about 6 years ago when I was cleaning the throttle body and it was just an excess buildup that must have gotten to one of them. Overheating is usually the killer for the coils, but otherwise 5 of the 6 in my 1MZFE RX300 are still running since new. Coils are usually one of the things on my vehicle that I keep OEM whenever possible, but I can completely understand tight budgets in this economy if you have to get something non-OEM.
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Old 12-27-11, 09:22 AM   #12
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I think there's something more going on, I have a hard time believing that many coils are failing on their own. Maybe a bad grounding issue? Are there any other electrical issues? How are you making sure the coils have actually gone bad? One way to check is to swap the coils around and see if the failure follows it.

These type of coils are certainly not a regular "disposable" part like spark plugs that you normally just throw away after a certain amount of mileage. Going through 8 coils in a short amount of time is very suspect.

Also, I would echo the sentiment that if money is really tight, go get some replacements at a salvage yard rather than aftermarket. This is one of those cases where OEM is really better. Sewell is a good online dealer where you can get factory parts for substantially less.
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Old 12-27-11, 10:01 PM   #13
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oem coil cost only 70 bucks and not all coils go out at the same time.
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Old 12-27-11, 10:29 PM   #14
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I would go with OEM as well. Just looked up the price on my "go-to" Lexus dealer's website and it's $71.44/ea. I highly recommend this dealer, if you're interested in getting OEM coils.

http://www.trademotion.com/partlocat...=1&catalogid=2
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Old 12-28-11, 12:24 PM   #15
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My 99 has 6 coils. 2 years ago one of them on the rear bank went bad. I replaced that one from a salvage yard coil. The very same one (last one on the rear bank closest to battery), went bad again in about six month. I went & bought a new one from stealership and no problems since then. For what it is worth...
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Old 12-28-11, 12:24 PM
 
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2000, 300, change, coil, coils, cost, es, es300, failing, filter, ignition, lexus, oil, replace, wire

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