DIY - 2012-2016 Toyota Prius C Spark Plug OEM Replacements FK16R-A8 3485 - Denso Iridiums

I replace my old spark plugs on my 2016 Prius C. Denso recommends replacing them at 30k miles while Toyota does so at 100k. I am a big fan of preventative maintenance to keep my car running well so I change them at 72k miles.
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[@Bopperkid]

You make this seem like the easiest car repair to do. Let’s see how many ways I can unintentionally fuck this up.

[@Echizen32kMedia]

Take your time and don't rush. Believe in yourself, you got this!

[@MacInTheBox]

@@Echizen32kMedia What a cheerful dude. The world's better for having you :)

[@PaoloVarquez]

Gotta love the Prius C!

[@holamariya]

Thank you!!! It worked! So happy to be able to do it myself with your very clear video, and save a bunch of $.

[@Kosiazikiwe]

The dealer shipped asked for $454 for this job. Thanks!

[@HWandW]

These [OEM iridium] spark plugs will last 100,000 miles or a bit more. If you're concerned about them "sticking" or getting stuck in a little bit of copper anti-seize on the threads will go a long way. Not too much anti-seize because it's not good to have it in the combustion chamber/cylinder. Your old plugs, at 50,000 miles could have been cleaned with a propane torch, burning off any deposits that they may have had. Obviously, if you do this technique don't have flammable material nearby. I hold mine with long pliers with gloves on over concrete as I use the flame on the torch to burn off deposits. Let them cool before reinstalling.

[@WongKY801]

The 3rd and 4th Ignition coil from the left hand side is very difficult to unscrew....

[@brianmagee8597]

I could be wrong but that looks like more than 15 ft/lbs of torque

[@aneal191]

Can I hand tighten it with a socket wrench or must it have 15ft/lbs?

[@pinkyhotmessx69]

Just wanted to say thanks. I got my dad a Prius like yours and it's a new car for me to work on. I'm very familiar around Hondas n Scions and now you've made it that much more easier for me to do this newer car I'm kinda scared of lol. Love your videos they are straight n to the point on a very great pace. Do you have one on changing the gaskets?

[@Echizen32kMedia]

Thanks for watching! Prius C are very easy to work on. I don't have one on changing the oil gasket, but I'll keep it in mind for future videos.

[@TAnotebook]

I cant seem to remove the caps (that are attached to the wires) i tried for half an hour they would not budge... any recommendations?

[@usmc0311dc]

Could you write out a list of the tools you used? Gonna need to buy some of these to do my spark plugs

[@jamescc2010]

What is the gap?

[@Carsox]

Thanks!! I think I can do this.

[@alvy_k]

you're using 8 or 10 inch extension to remove 10 mm but I tried 6 inch and it doesn't fit and with 3 inch extension something in the way to loosen the lug nut from 3rd spark plug from the left

[@riceburner4747]

Smooth as a baby's bottom! 👍

[@mvelusc]

Thank you for sharing this 🤍🌼

[@ryand9111]

I have a 2016 Prius C - when would you recommend replacing the ignition coils?

[@Echizen32kMedia]

Good question, I know spark plugs are recommend at 100k. I did mine at 50k, but as far as ignition coils are good to go unless they have cracks or you get a code.

[@dominicfong6341]

Did you experience any difference after the swap in terms of fuel economy and power?

[@Echizen32kMedia]

I think maybe just a little better MPG but not much difference. I just feel better knowing that I am taking care of the car.

[@dominicfong6341]

@@Echizen32kMedia Thank you very much for your kind reply dear sir!

[@Sunnysky321]

Nice job. Understood you are changing them preemptively, but just wonder it should be done later? Prius C maintenance schedule says 120k miles.
Actually Toyota regular cars (such as Corolla) with the same type of spark plugs call for 12 years / 120k miles schedule. Since Prius C runs the ICE intermittently, it seems reasonable to change them even at a higher mileage, probably double the mileage you have (140 - 150k)?

[@Echizen32kMedia]

Thanks, yes they do recommend changing them at 120K. But I just wanted to do them earlier so the car runs a little better and they're fairly cheap. I think you should be alright changing them at 120k.

[@lixiajin8448]

I agree to do them earlier than later. Mine have 100000 miles and I am about to get it done. Nice job and video. I am about to change my transmission fluid the second time. Have you think about change the water pump at 120000 miles even though nothing wrong with it? Because I hear once the water pump not working and it’s going to hurt the engine right away.

[@aneal191]

Local shop wants $180 for labor for this job

[@saidmohammad63]

Thanks ❤for the good job