Ignition Coils (1 Viewer)

[Jackland]

Kind of confused about the difference between ignition coils. Currently two are Denso 90080-19027 and the other 6 seem to be a various collection of non-Denso ones. The two Denso coils were bought from the dealer last summer, two of the other 6 are now apparently failing and so I'm replacing all 6 of them along with the spark plugs. It seems that the 90080-19027 is the "correct" Toyota part, but of course it is $85-$90 compared to the 673-1303 Denso units from Amazon and other places.

If there is a benefit, I can suck it up and pay the extra. Is there????

 

[TXLX007]

There’s a lot of threads on this, but for what it’s worth I just went through this similar question and process.

Spend the extra money and get the proper Japanese manufactured part, Is the consensus on this forum.

Most people are reporting failure within 12 to 18 months with the aftermarket. This appears to be an instance where “you get what you pay for” applies.

 

[Jackland]

There’s a lot of threads on this, but for what it’s worth I just went through this similar question and process.

Spend the extra money and get the proper Japanese manufactured part, Is the consensus on this forum.

Most people are reporting failure within 12 to 18 months with the aftermarket. This appears to be an instance where “you get what you pay for” applies.

Understand, however is there an appreciable difference between the Amazon/Jegs, etc. Denso and the Denso that I'd buy from the dealer or a "genuine toyota" supplier? Or is the consensus that it is the exact same part? I noticed on one of the Amazon Denso coils, 673-1303 it stated something like "Denso USA" on it. The 90080-19027 had "Toyota Denso".

Our vehicle is the poster child for coil issues, I'm embarassed to say how much I've paid two different "reputable" local shops to replace coils with complete garbage.

 

[Ayune]

To summarize all I've learned through 'Mud and actual experience:

• Buy either Toyota 90080-19027 or Denso 673-1303 from a reputable seller.
• If it costs less than ~$50 it's counterfeit.
• I've bought genuine from Amazon and Walmart. eBay one was counterfeit.

 

[Ayune]

Also, it doesn't hurt to carry a spare coil with you along with an OBD reader, cylinder diagram, and a 10mm socket w/extensions. If your engine cover is already off it takes about a minute to change one and you'll be the family hero.

 

[mcewan13]

how does one know when a coil is failing? what are the symptoms?

 

[Ayune]

how does one know when a coil is failing? what are the symptoms?

Rough idle, stuttering on acceleration, check engine light comes on, exhaust smells like gas.

 

[gungriffin]

• If it costs less than ~$50 it's counterfeit.
• I've bought genuine from Amazon and Walmart. eBay one was counterfeit.

This! Just because it says Denso, doesn't mean that it is real. It is all about the seller. This is a great time to only buy from large and proven sellers. Ebay can be a good place to buy, but don't buy the $20 version from the seller with 40 reviews and expect it to be real...

 

[gungriffin]

Rough idle, stuttering on acceleration, check engine light comes on, exhaust smells like gas.

Are there any RPM ranges that the consensus says the stuttering is more prevalent? I ask because I seem to have a small hesitation when the engine is cold at about 2000-2500 RPM. Exhaust also has some gas smell. I was going to start with changing the spark plugs as I have not thrown a code yet.

 

[firewood]

There are also some bogus ones on eBay are priced just so you think it might be a great deal, open box or dent/scratch.

Some of the counterfeiting comparisons chronicled on this site show just how nuanced the differences are between genuine and Chinese fakes.

I bought all of mine from Summit.

 

[Ayune]

Are there any RPM ranges that the consensus says the stuttering is more prevalent? I ask because I seem to have a small hesitation when the engine is cold at about 2000-2500 RPM. Exhaust also has some gas smell. I was going to start with changing the spark plugs as I have not thrown a code yet.

Bad coil pack will run like crap at all RPMs.

If it hasn’t thrown a code then it may not be a coil. Try easy/cheap things first: Start by cleaning the Mass Airflow Sensor (MAF) and throttle body (TB). Both are easily accessible and can smooth out the engine with just some inexpensive spray cleaner. Search ‘Mud for details so you know what to expect and don’t break anything else.

I think you need to disconnect the battery for a few minutes to reset the ECU. Then drive around and it will adopt new settings.

 

[Jackland]

For mine, we had misfire codes and an amount of shaking/rough running that was definitely not subtle.

 

[gungriffin]

Bad coil pack will run like crap at all RPMs.

If it hasn’t thrown a code then it may not be a coil. Try easy/cheap things first: Start by cleaning the Mass Airflow Sensor (MAF) and throttle body (TB). Both are easily accessible and can smooth out the engine with just some inexpensive spray cleaner. Search ‘Mud for details so you know what to expect and don’t break anything else.

I think you need to disconnect the battery for a few minutes to reset the ECU. Then drive around and it will adopt new settings.

Good to know! Thanks for the heads up.

 

[nissanh]

I got oem toyota used coil packs from a junked Sequoia, $5 a piece. The only thing I looked for is any cracks on the plastic tube/housing.

 

[gholsie]

Coils are a critical component to making sure you get from point-a to point-b. Don't go cheap, do it right the first time. Go with Denso 673-1303 or OEM Toyota. This will cost you $500-800, but, it's worth the investment. I found a post with a discount code from Jegs.com with promotion "SAVENOW" - I picked up 8 new Denso coil packs for $418.

Replace all of them at the same time and also replace the plugs with the stock Denso Iridium plugs. Assuming your 100-series is paid off, this will save you a lot more money than buying a new ride that will cost you $500-600 a month.

You, and your family, will be secure with a reliable ride for many more years....

Mike

 

[bamabrock]

I just ordered a real denso coil from amazon to have as a spare for $59

Amazon.com: Denso 6731303 Ignition Coil: Automotive

Buy Denso 6731303 Ignition Coil: Coils - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[semlin]

Kind of confused about the difference between ignition coils. Currently two are Denso 90080-19027 and the other 6 seem to be a various collection of non-Denso ones. The two Denso coils were bought from the dealer last summer, two of the other 6 are now apparently failing and so I'm replacing all 6 of them along with the spark plugs. It seems that the 90080-19027 is the "correct" Toyota part, but of course it is $85-$90 compared to the 673-1303 Denso units from Amazon and other places.

If there is a benefit, I can suck it up and pay the extra. Is there????

i see a lot of rapid temperature and altitude variation in my driving and my hundy really eats coils. i tried cheap coils and it ate them much faster.

i switched to denso and so far i have never lost a denso. i buy them from rockauto or amazon (with amazon as the vendor).

fwiw, when you change a coil, try to replace the plug at the same time or at least remove the plug and inspect. i found belatedly that part of my problem was oil seal failure in the valve cover leading to oil pooling around the plug and cooking into some kind of goo around the base of the plug. once that was addressed my coil failures went way down.