Hey, 2015 EX, new to me (purchased in Jan 2024) with 160K miles. Service history details unknown. (I suppose I could buy a Carfax report but i don't know what kind of details goes into those things and I don't want to blow US$40 to read "dealer inspection" or similar).

The car seems to run fine. Idle is okay, not rough. Accelleration-- even brisk acceleration to pass a big truck seems smooth without any noticeable hesitation or skipping. Fuel economy seems good-- cruising on the highway for approx 50 miles with cruise set to 65mph i get almost 45mpg (trip reading, cumulative for 1,400 miles is 37mpg) But I don't have a baseline for what this car SHOULD get for fuel economy. I just know my 2013 Fit Base only had a cumulative fuel economy of 33-34mpg over 3,000 miles.

ANYWAY...

I've decided to replace the spark plugs since i have no idea when they were last replaced and I figured it'd probably be a good idea just because. I've got a new set of plugs but it just occurred to me (of course now that I'm no longer at the store) that maybe I should also replace the coils? But considering the car seems to run fine, maybe not?

Additionally, when looking for coils, i see the coils themselves and also "boot kits." Do coils not come with boots? Would I need to purchase a boot kit in addition to the coil packs?

Thanks for any tips.

 

Leave the Gun. Take the Cannoli.



Replace the spark plugs.

Leave the coil packs if there is no problem. If needed, this looks like the correct part.

 

I agree. Plenty of cars need coils by that mileage, but you don't even know if theyve been done. If it runs fine, power, mpg then leave them. Worst case you have to do them a bit later. Coils are just a bolt and a electric plug to change. And they rarely fail in a "leaving you stranded" type of way, unless you have a VW and then they like to form airborne electrical connections and arc between all 3 coils on each cylinder bank. Honda life is better

Tighten your plugs correctly to spec. The 3rd gen has fewer problems but just take care as a best practice.

 

This is a better picture of the coil with Amazon's price. I've seen cheap coils from no name Asian manufacturers and they seem somewhat "naked" in comparison. Maybe that's where the boot is needed.

 

Holy cats! US$37 each for Hitachi coils?? I was finding them on auto supply sites for easily twice that. Same model. Thanks for the tip! (Hopefully they're not counterfit!

 

Nope. Look genuine - I'm holding one in my hand right now . Made in Mexico. I guess that's why the price has come down from what it used to be - Hitachi probably built a factory in Mexico to supply all the car plants down there. These parts would have been pretty expensive coming from Japan.

 

160k miles and no clear history....
If you're planning to keep the car for a while, it's not that much money.
So, I'd just replace them myself, but it's really a personal decision.
I'd also buy it from a reputable vendor (e.g. SparkPlugs.com / NGK.com), or even the dealer parts department.
Times being what it is, so many fakes abound.

 

sounds like your car is running just fine , my '19 6 speed is averaging 35 mpg at 55k . i changed the plugs at 33k ( which i know is early ) with
NGK IX plugs . all 4 factury plugs had what looked like blowby up the ceramic stems and car ran better ( there was an enoying hesitation from a stop , it went away ) .
i know the boots can get dried out over time so i would inspect them . if you go for a set of coil packs , i'd go to Honda . you can get a good price for parts at Bernardi
Honda on line .

 

Keep in mind that you can pull just one spark plug out and examine it (incl measuring the gap) to see what condition it's in which will give you an idea of whether it's worth changing plugs at this time or not.

 

With all due respect to my colleague, Señor Woof, "too good to be true" is the benchmark for fraud, and half the going rate is too good to be true (?). Also, Hitachi-Japan ≠ Hitachi-Mexico (?). Also, Amazon. Three strikes and you're out (?).

Woof's got the part in hand. I'll be on board after he installs it, and there are no problems. I'm rootin' for you, Woofy (even if it doesn't sound like it).




Note: I put question marks on my statements because the issues are red flags for me, not because I am certain of anything.

 

Every time I've looked at Bernardi, they seem to be the most expensive of anyone else.... significantly more expensive.

Edit: I'm specifically comparing it with other online dealers.

 

I like rockauto whenever I start griping about parts costs. I have not specifically looked for coil packs but in my experience they have just about everything.

 

I second this, rockauto is the best place for genuine parts at a fair price. It’s not worth the gamble on Amazon or eBay anymore.

 

I avoid Bernardi. They used to be good, but now 1) they are pricey, 2) they allow you to make a purchase without telling you that the parts are on back order, 3) their idea of "shipping and handling" is "just throw it in a box." Why should I bother with Bernardi?