Maching or replacing Rotors

[blondee_yvr]

My M3, only 6 months old and 4000 KM on it has some rear brake issues. Occasionaly clunking. Dealer serviced the brakes as per bulletin. Problem is still there.

I noticed slight grooves on the rears but not the fronts. I compared my M3 with some older one's in my parking garage and none appear to have grooves like mine.

I dont like machining them when they are so new cuz that only makes them wear quicker. Besides, since my rotors are so new with so low mileage i dont want them machined but replaced. Of course, it's cheaper for Mazda to machine them instead of replace.

Does anyone know what Mazda Canada's protocol is on machining or replacing the rotors?

 

[MidnightSpeeder]

What I've found is that they usually don't like replacing and the TSB calls for machining the rotors.. thats what I heard from my local dealer.

 

[ZoomVT]

i had the same problem whn i had just gotten my car. I was actually told to just give it time. It actually worked, if you drive through gravel or lots of dirt some of it may get stuck on the pad and groove your rotors. Mine was fixed after a few hundred miles. If it persists i would ask them to replace them.

 

[blondee_yvr]

What I've found is that they usually don't like replacing and the TSB calls for machining the rotors.. thats what I heard from my local dealer.

Hmm. Doesn't prevent me for making a fuss with Mazda Canada. (wink)

 

[blondee_yvr]

Midnight Speeder, I think the dealer gave you some bunk. I found this TB but it applies for a 2004:

http://www.finishlineperformance.com/mazda3/docs/0024.pdf

 

[goldwing2000]

Just leave it alone. The grooves will go away after a while. At least mine did.

 

[Puckpimp71]

Had some customers with the same deal. After a few miles it went away. They said they didn't notice any negative effects on their braking, just in the appearance.

 

[goldwing2000]

Had some customers with the same deal. After a few miles it went away. They said they didn't notice any negative effects on their braking, just in the appearance.

Yep, that's exactly what the TSB says:

The grooves can give a poor appearance. This may be caused by the rotor anti-corrosion coating, which attacks the rotor.
NOTE: This concern does not affect braking performance or reliability.

 

[MidnightSpeeder]

Midnight Speeder, I think the dealer gave you some bunk. I found this TB but it applies for a 2004:

http://www.finishlineperformance.com/mazda3/docs/0024.pdf

Hmm... great. (notcool)