So I took out one of my coils to see how they were doing and this is what they looked like.

Do you think its time to change them out or can I tough it out for a bit longer. Also, the metal plate that the coils sit on was very rusty (damn Canadian winters...) so can I swap that out too or should I clean it up a bit? Sorry no pics of the rust.

 

the white spots on the coils are never an accurate way to determine the health of the coil.
the only real way is to use the diagnostic method outlined by mazda. (you'll need a multi-meter)

how long have you had the coils?

 

I've had the car for 2 years exactly and its an 05. As far as I know they've never been changed. I have a multi-meter. How do you check?

 

original coils on an '05?
I'd definitely encourage you to consider changing all 4.

http://www.finishlineperformance.com...16-07-1793.pdf

 

Go ahead and change them out...Not worth the risk...Or you can spend $500, install the BHR Ignition Kit, and not have to worry about your coils...Much better choice...

 

Mazda's method is never correct, something that pass can still give you misfires. neither is the white spot an health indicator

if you have over 20K on the coils then just change it. Buy from Advance Auto Parts. Lifetime warranty.

 

Did I mention that I'm in Canada and my local Mazda stealership charges $130 PER COIL? It would be cheaper to order the BHR system...It's been on my list for awhile. Thanks for the tips guys.

Any advice on the metal plate the coils sit on? Is that removeable/changeable? It looks like sh*t...

 

dale: given the price of OEM coils, I say jump on a set of BHR coils and call it a day.

as for the plate: just polish the hell out of it, should look good as new

 

Holy god...f*** that...

 

130 ? ... I rather just push my car off the cliff or some ****.

 

Umm...rotaryfx had them for 39.99 just sayin...

 

Yeah I was a bit shocked by the price too...

 

Some says 30k miles is the time for coils to be replaced. I have 32k miles and i'm about to replace mine soon.

 

I just got my BHR kit in the mail today, hopefully I'll be installing it tomorrow. Yeah $130 per coil is pretty ridiculous...! I'd say go BHR or else find some at a decent price online and get em shipped. Change em out though for sure, better safe than sorry.

 

Pictures of a "(severely) white spot printed coil", opened with saw and hammer by a German fellow to look how the inside shows.............the inner synthetic material is partly heavily charred with ditto smell........





Regards, Ruud