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Replace coil packs with spark plugs? #5327678 01/20/20 09:34 AM
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jayjr1105 Offline OP
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How often do you guys replace your coil packs? Not sure if the manufacturer recommends a certain time for these or "whenever they break"?


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327681 01/20/20 09:35 AM
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Donald Offline
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maybe at 100K


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327683 01/20/20 09:36 AM
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eljefino Offline
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The OE packs are likely better than you'd get aftermarket. Run them until you get a problem.

Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327684 01/20/20 09:37 AM
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edyvw Offline
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Originally Posted by jayjr1105
How often do you guys replace your coil packs? Not sure if the manufacturer recommends a certain time for these or "whenever they break"?

What vehicle?


11' BMW 328i xDrive 6MT (BMW TPT 5W30+OE filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OEM filter).
Re: Replace coil packs with spark plugs? [Re: edyvw] #5327688 01/20/20 09:40 AM
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jayjr1105 Offline OP
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Originally Posted by edyvw
Originally Posted by jayjr1105
How often do you guys replace your coil packs? Not sure if the manufacturer recommends a certain time for these or "whenever they break"?

What vehicle?

Vehicles are in my sig, Both have had plug replacements on schedule but never replaced coil packs.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Replace coil packs with spark plugs? [Re: eljefino] #5327690 01/20/20 09:42 AM
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jayjr1105 Offline OP
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Originally Posted by eljefino
The OE packs are likely better than you'd get aftermarket. Run them until you get a problem.

RockAuto sells the OE packs which are Denso most of the time.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327691 01/20/20 09:45 AM
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exranger06 Offline
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Replace coil packs on an as-needed basis only. If the car is running fine with no misfires, leave them alone. If one coil goes bad, replace just the bad one and leave the rest alone.


2006 Ford Ranger Sport
1992 Honda Accord EX
2013 Toyota Sienna XLE AWD
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: Replace coil packs with spark plugs? [Re: exranger06] #5327701 01/20/20 10:00 AM
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Char Baby Offline
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Originally Posted by exranger06
Replace coil packs on an as-needed basis only. If the car is running fine with no misfires, leave them alone. If one coil goes bad, replace just the bad one and leave the rest alone.


I agree! Coil Packs are expensive(especially OE) and are IMO, a one at a time replacement item.
I also agree with others who have mentioned to stay wit OE and not aftermarket. Too often the aftermarket ones leave a lot to be desired in terms of quality & longevity(often causing misfires &/or CELs). Even the know brand name ones can be troublesome.


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327705 01/20/20 10:07 AM
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brages Offline
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Originally Posted by jayjr1105
Vehicles are in my sig, Both have had plug replacements on schedule but never replaced coil packs.


FWIW, neither vehicle has coil packs; they are coil-on-plug.

To answer the question, wait until a misfire occurs, the coils are not hard to change on either vehicle. Rear bank on the Odyssey requires a slight amount of skill (but not much), and IME Odyssey coils are not problematic.

Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327710 01/20/20 10:15 AM
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JeffKeryk Offline
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Our beloved 2006 TSX with 195K miles recently broke down; it was the #1 coil. It was about 15 miles away and was towed to a great shop not far from home.
FYI this car has been garaged and well cared for...
I would have loved to do the diagnosis and repair but due to a recent surgery could not do do.
So the repair cost was over $200; I don't recall exactly.
A Delphi coil was installed. Later I bought 3 more from Amazon for about $40 each based on good BITOG advice.

The car is like new, and it ran pretty darn good before the 3 new coils.
Gas mileage has improved, but the real benefit, to me anyways, is the improved performance.
Rock solid idle, pulls strong thru upper RPM.

If you can afford a breakdown, wait until individual coils die. Your call.
For me, the piece of mind and restored performance is well worth replacement.
Coils are wear items.

I have 8 new OE coils for our Tundra with 197K miles, waiting for installation.
Going forward, I will replace coils on any of my cars with over 180K miles, or sooner.


2018 Tesla Model 3, Medium Range Battery
2018 Lexus RX450h
2013 Lexus GS350 F Sport
2006 Acura TSX
2001 Tundra Access Cab, 1998 Accord LX, 1968 Corvette L36 Roadster, 1965 Olds 4-4-2
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327715 01/20/20 10:18 AM
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Geoff Offline
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If you have short coil to plug wires, replace those. In my case with a Chevy LS3, the clip in the boot (clips onto top of plug) is extremely fragile. They break off in the boot and cause misfires.


2020 Chevy Camaro ZL1 1LE
2019 Jeep JL Wrangler
2015 Audi A3
2013 Chevy Camaro LS3/NPP
2008 Chevy Suburban [sold]
2004 Land Rover Discovery
2007 Supra 22V
Re: Replace coil packs with spark plugs? [Re: Geoff] #5327728 01/20/20 10:31 AM
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jayjr1105 Offline OP
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Originally Posted by JeffKeryk
Our beloved 2006 TSX with 195K miles recently broke down; it was the #1 coil. It was about 15 miles away and was towed to a great shop not far from home.
FYI this car has been garaged and well cared for...
I would have loved to do the diagnosis and repair but due to a recent surgery could not do do.
So the repair cost was over $200; I don't recall exactly.
A Delphi coil was installed. Later I bought 3 more from Amazon for about $40 each based on good BITOG advice.

The car is like new, and it ran pretty darn good before the 3 new coils.
Gas mileage has improved, but the real benefit, to me anyways, is the improved performance.
Rock solid idle, pulls strong thru upper RPM.

If you can afford a breakdown, wait until individual coils die. Your call.
For me, the piece of mind and restored performance is well worth replacement.
Coils are wear items.

I have 8 new OE coils for our Tundra with 197K miles, waiting for installation.
Going forward, I will replace coils on any of my cars with over 180K miles, or sooner.

Yeah the Delphi's are only $30 compared to $40-50 for the Denso or NGK's. If one died I would definitely replace them all anyways.

Originally Posted by Geoff
If you have short coil to plug wires, replace those. In my case with a Chevy LS3, the clip in the boot (clips onto top of plug) is extremely fragile. They break off in the boot and cause misfires.

As the other guy said, I have coil on plug's, not coil packs. I thought they were one in the same.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327742 01/20/20 10:48 AM
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I can say one thing about the coil pack on a 2012 Chevy Cruze. I had to replace the original one at 40k due to issues of light hesitation under light throttle. Then it started up again in another 30k miles. So I replace the GM coil with an MSD. Same price so why not try it. All I can say is WOW. Huge difference and the mpg increased. Usually averaged 27.4mpg and now getting 30mpg.

If anyone has a Chevy Cruze with the 1.4 I highly recommend changing out the coil for and MSD. You can get it at Summit Racing. It cost me $90.


2002 Silverado 5.3 0w-20 AMSOIL
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327748 01/20/20 10:51 AM
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edyvw Offline
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Originally Posted by jayjr1105
Originally Posted by edyvw
Originally Posted by jayjr1105
How often do you guys replace your coil packs? Not sure if the manufacturer recommends a certain time for these or "whenever they break"?

What vehicle?

Vehicles are in my sig, Both have had plug replacements on schedule but never replaced coil packs.

I would definiately change cables on Honda since you are doing spark plugs.


11' BMW 328i xDrive 6MT (BMW TPT 5W30+OE filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OEM filter).
Re: Replace coil packs with spark plugs? [Re: jayjr1105] #5327793 01/20/20 11:35 AM
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JHZR2 Offline
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I recall that it was recommended to do the "cartridge" on my 2004 Saab around the time of plugs. I think it was because all the coils were in that monolithic piece, so failure of one was a bigger issue.

I replaced a set on a friend's 2002 GTI at ~180k. That car self destructed around itself (VW poor quality days), but the engine ran great (sludgemonster, but we ran M1 0w-40 to prevent) until the end, even with CELs and broken breathers.

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