LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Stay away from ngk ignition coils

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Old 06-12-24, 06:08 AM
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StraightZest
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Default Stay away from ngk ignition coils

Did a timing job on my 1990 LS400 which included changing
the ignition coils, the “new” NGKcoils went out not even two weeks into driving it. Didn’t realize it was even the coils until a couple of weeks of tinkering with it. Felt like gas issues when they went out while driving it. Would start and immediately shut itself off. Turns out if the ECU sees a bad/no signal back from the coil it kills the injector circuit. Codes 13, and 15. Changed the coils out for some Toyota ones I had sitting on hand and now she runs great. Only have code 13 now. ​​​​​​​​​​​​​​

Old 06-12-24, 11:51 AM
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paulo57509
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I'm curious....where did you get the crap NGK coils from?
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Old 06-12-24, 11:56 AM
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StraightZest
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Ngk ignition coils purchased on rock auto
Old 06-12-24, 11:59 AM
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LeX2K
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For some cars there is no choice may as well get NGK made in China vs. generic made in China. New OEM for your car is still available.
https://www.amayama.com/en/part/toyota/9091902197

Now I'm nervous just repaired a car with a bad coil put in NGK.
Old 06-12-24, 12:11 PM
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StraightZest
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If you end up having ignition or fuel issues I would check there first
Old 06-12-24, 12:26 PM
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LeX2K
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Owner didn't want to spend $140 on a coil, which is good value lMO since it would last until the car is scrapped but not my vehicle. 90919-02197 in a Camry same part as in the LS.

The coil failed without warning (car was parked luckily) and showed no signs of cracking it looked perfect. Just died.
Old 06-12-24, 12:46 PM
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CELSI0R
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Not all parts are made equal, but I will say I have a spare NGK coil in my trunk that I keep in the event of a breakdown

It tested fine on the bench when I inspected it, and was removed from a running car

Would I use it on my car every day? No, probably not... But would I keep it as a spare or use it to get by? Absolutely

The 2 you got may just have been defective out of the box.. I feel like we hear about that a lot these days with aftermarket parts
Old 06-12-24, 02:23 PM
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fortitude
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Example for 2002 ES300
Denso Coil 673 1301 was produced in Japan. Its not longer available

New replacement is Denso 673-1312 produced in China

Last edited by fortitude; 06-12-24 at 07:16 PM.
Old 06-13-24, 11:19 AM
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paulo57509
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Originally Posted by StraightZest
Ngk ignition coils purchased on rock auto
While counterfeit NGK plugs are common, I haven't heard much of counterfeit coils. RA isn't an authorized NGK distributor; hopefully, they're getting their stock from authorized sources. But in today's economy, one never knows.


Old 06-13-24, 08:32 PM
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Yamae
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There is another person who had a bad experience with NGK coils from Rockauto.
https://www.m3post.com/forums/showthread.php?t=1918830
Old 06-13-24, 08:59 PM
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Striker223
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Huh, that's concerning. I usually buy denso though so I'm not too worried
Old 06-14-24, 07:11 AM
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fondu
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I have NGK coils and Denso wires that were purchased on Rock Auto for a total cost of ~$160.

The OEM parts cost $212 for the wire set and $95 dollars for each coil pack. A total of ~$400.

My question is would the engine run better with the OEM wires/coils?
Old 06-14-24, 11:33 AM
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bradland
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Originally Posted by fondu;[url=tel:11740077
11740077[/url]]I have NGK coils and Denso wires that were purchased on Rock Auto for a total cost of ~$160.

The OEM parts cost $212 for the wire set and $95 dollars for each coil pack. A total of ~$400.

My question is would the engine run better with the OEM wires/coils?
Volts are volts.
Both the coil and the wires are easily measured with a volt meter.
If you test the parts and they are functioning properly it’s not a matter of performance but longevity.
A genuine part will typically last twice, if not 3x, longer than an aftermarket equivalent.
You still end up paying the “$400” over a period of time with aftermarket parts.
Old 06-14-24, 10:43 PM
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CELSI0R
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An important factor is how long you're going to keep the car, especially considering longevity of the part, as bradland said

The OEM parts are often (if not always) better. However, if you're only going to have the car a couple more years, then putting on aftermarket parts isn't such a bad idea - as long as they test fine, and the car runs well with said parts

If you want to hold onto the car for longer, the OE parts are probably worth the investment

All of this also considering personal financial circumstances
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as99east (06-15-24)
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