Spark plug Denso or OEM Mazda

Ignition coil most likely. I have done many dozens of them. Takes about 2 minutes to replace.

I recently got Denso (OEM) from my local o’reillys cheaper than the dealer (~$80).

Bro ABSOLUTELY do the spark plugs yourself. I bought oem Denso spark plugs from Napa Auto for about $180. Then all you need is a spark plug socket w/ swivel head, 10mm socket, 12mm, a couple extensions, needle nose pliers, dielectric grease, and a pick to make life easier.

Denso iridium spark plugs

New Denso Platinum spark plugs. Car drives great, no codes, no sputtering or stalling or hesitation.

Fitting a decent set (Denso or NGK) of iridium plugs is also worthwhile.

Just did mine at 69k. Felt like a small pickup in performance.

That price at 63.5k miles isn't bad imo. I spent roughly that same amount for my 2017 back in 2019 with around 40k miles (64k km). What's the service history look like? Have spark plugs been replaced, belts checked, engine oil changed at least 10-12 times by now? How are the pads and rotors?

I’ve had several Denso plugs do this on a couple Camrys I service, and our own. All 2.4 cars. Caused tow ins for both husband and wife’s cars. I’ve fired denso as a spark plug provider, too many failures.

I wish my Toyota 4Runner spark plug service was that cheap in the Toyota dealer. I was quoted $800 parts + labor for OEM Denso.