What is the recommended mileage replacement cycle for ignition coils on a 2005 3.0 liter V6 engine? Thanks for any assistance.
There is no "recommended" replacement for the ignition coils from Mazda.
I agree with you here. I can feel them very subtly but even now get thrown by the AC compressor sometimes. It was a nightmare to do that work (Mazda wanted $5700) the first time with everything rusted. Two hundred bucks every 12 years (my mileage rate) is cheap insurance (even given the fact that I have rarely received a faulty new electrical part)I've only got mild misfires once and I could feel the engine "missing power/hesitating". I guess it comes to how much you know your car and pay attention to its behaviour (not saying you guys don't).
IMO, replacing them often will help you sleep better but won't ensure there won't be any misfires. This is just me, I respect what others want to do and how they want to spend their money.
I guess to better answer this, would be by knowing how many cycles are expected from these coils.
Did you check the coils before replacing them? Mine are all showing consistent resistance on primary and secondary windings so I wonder if replacing them will help at all.Replaced all spark plugs and coils. The job took about 3 hours. I made a list of all the steps after watching a YouTube video and reviewing my Haynes manual. It wasn't a bad job. I just made sure I tagged stuff as I pulled it off and then followed my list in reverse. Had a problem with one of the new coils. Advance Auto somehow had the wrong coil in one of the boxes. Next time I'll open and check all coils for consistency before I leave the store.