What I am about to mention is my opinion and experiences.
FIRST off I WILL NEVER BUY ANOTHER MAZDA AGAIN.
The jerks at the dealership where I bought my 2012 Mazda 3 Hatch 2.0 Skyactiv are nasty aholes and liars..
I took car in for their "free" oil changes and inspections; always was given a great condition report.
I rotated the tires around 3-4 thousand miles and have 28,000 on the car I also inspected the tire before putting them back on.
After a a short period of time after one rotation Jan 2015 I started to heard faintly then it got LOUD after a few weeks that "noise" everyone is writing about here.
Okay I've been a mechanic for a number of years and usually do my own work; BUT this is a new car and it still is covered by Mazdas warranty Bumper to Bumper; yea right what warranty..
So I thought a wheel bearing; really on a car this new, so I did a driving test to see it it was that; Nope not wheel bearings.
NOW the noise is loud enough I can't hear the engine.
I then inspect the suspension; nope all okay.
I rotate the tires again and yup the noise moved with the tires.
Okay so it is a "tire" problem.
The set of tires that used to be on the rear had some "feathering" or "cupping" strictly on the inside edge of the tires; NO WHERE ELSE.
This went from the edge of the tire and stopped at the first inside tread line.?? I thought. BOTH tires are exactly like this.
I thought alignment? Huh, I've not run into or done anything to knock the cars alignment out of spec.. So off to the shop and they put the car on the Hunter Alignment machine checking all four wheels; got a print out stating alignment is perfect??? WTH? Before I had the shop check the alignment I asked them do they do it on the shop floor or the alignment rack? I was told on the rack and I asked them was the rack level? They told me yes.
( remember if the rack or the floor where the alignment is done isn't level it preloads the suspension out of level and throws off the alignment when done and take off the alignment machine. That is how you can get pulling to one side.)
Okay you may be thinking why didn't I just run to the dealer?
Simple they want you to do that and charge you.
Okay so now I head to the dealer where I spent Tens of Thousands of dollars to them buying this "new" car.
I didn't tell them what I have done mentioned previously; I have in the past and it didn't turn out to be helpful, just caused more problems. Plus you have this you will KNOW immediately they are a bunch of liars as was my case.
Then lets now watch all the BS fly and boy did it fly.
First off the "manager" told me my tires are out of warranty 12 months 12,00 miles. I asked where it says that; in my owners manual.
Oh? I hold it up and asked him to show me; he does and points out how stupid I am.
Really? I ask this ahole..
The tires on the car are those 205x55x16R Bridgestone Turanza EL400 tires; I pointed out in the owner manual it states those tires have a SIX YEAR 60,000 mile warranty....
He blinks at me then states your warranty is void due to the aftermarket rims you have them on..
Really? You never mentioned anything about that in your previous vehicle inspections during those "free" oil changes and vehicle inspections?
The rims are aftermarket and they are at "factory" spec. dimensions etc.. The rims have nothing to do with the tire problem I told him and previous court cases back me up ( any defect not caused by a "modification" to the vehicle does not void any warranty)..
Again this ahole just blinked at me...
I asked why not just check the cars suspension and alignment to see if that is the problem.
Cha Ching I'd swear I hear..
He told me sure; $200.00 up front in case what every was found wasn't "warranty" related.
I looked at him with this WTF is going on.
I then pulled out my file and showed him documentation that everything is okay and has already been checked and the "defect" is the tires.
He would not budge on my forking over the $200.00 to do a diagnostic on a car still under warranty.
I wasn't yelling or even raising my voice but did see his employee's overhearing what was going on as well as a number of or lost customers ( who will more than likely tell their friends what they saw and heard ) walking out the door and pissed sales people losing their commission.
As I was leaving with no resolution to this situation I asked this ahole How much money have you just now lost from customers overhearing our "discussion" and leaving and also telling their friends about you and this dealership? As I was leaving I pulled my phone out of my pocket and told him smile you have been recorded....
I have since filed a complaint with consumer protection and other agency's.. I am also looking into a breach of contract ( failure to honor warranty ) law suit as well.
Here's what I have found out.
My car from Mazda has extreme negative camber on the rear end; THAT WILL account for the type of tire eating or cupping wear I have and maybe many thousands of others complaining about here and else where.
I had to buy two new tires ( Goodyear Eagle P SA 205x55x16R) and NO MORE NOISE, it is the tires after all and I still have them; with about 30-40,000 miles of life left on them,
I took the car to a custom alignment shop; the type racing autocrosser's and people who drop their cars low go to and the owner with decades of experience also confirmed what I suspected previously mentioned; the extreme negative camber. I was told this is a common problem with my car type from the manufacturer.
I am not suggestion you do what I did; I have the rear camber readjusted to not be so extreme and so far so good. Handling has not changed.
All Mazda WOULD HAVE TO DO IN MY OWN OPINION IS CHANGE THE CAMBER TO BE NOT SO SEVERE; COST VERY LITTLE - A TRIP TO THE ALIGNMENT RACK OR PUT OUT TO THE SHOPS "NEW" ALINEMENT SPECS.
The cost out of my pocket for all previously mentioned was around $600.00 dollars that I should have never had to spend.