Last post on Sep 14, 2013 at 9:34 AM
You are in the Mazda Protege
What is this discussion about?
Mazda Protege5, Hatchback, Sedan
#740 of 1420 Brakes: Warped rotors
Mar 09, 2005 (11:22 pm)
After rereading your postings, Skoobz, I agree with you that something sounds fishy. You say you bought your 2002 Protege5 used from a Mazda dealer last September and "that the car was inspected by their mechanics and that they would never sell a car that had problems" and yet 6 months later you have had to pay over C$400 for warped rotors. If the dealer assured you that there were no problems 6 months ago and you are certain that you had not created the problem, how did this happen? The rotors on my 2002 Protege5 with 50,000KM are in great shape; roads here in Ottawa are not as bad as in pot-hole-hell Montreal but my zoomster has had some hits this wicked winter.
You may want to call the service department again and ask to meet the manager for an explanation. I would more than hint that your continued patronage is at stake; in other words if the manager does not provide a satisfactory answer (and action) your future business will go elsewhere (to another Mazda dealership or an independant). You may want to also contact Kirk Robinson of Robinson Automotive (www.robinsonautomotive.com) in Toronto; he is a reputable independant who hosts a car show broadcast on Rogers in Toronto and beyond.
Is the car still under warranty? In the document of sale did they make any statement as to the condition of the car?
Good luck and let us know how things shape up!
#741 of 1420 Warped rotors.
Mar 10, 2005 (1:11 pm)
All too common on later-model cars, not just the Protege.
Used to be you had to do something silly like hosing down your car right after using the brakes hard. Of course, all rotors warp, but usually not enough to be a problem (as you mentioned, you can machine the outer faces flat, if there's enough material).
Troll the other boards, and you'll find lots of warped rotor complaints. I think the causes are 1) they use less steel (less to act as a heat sink and to conduct away heat) and 2) the steel isn't properly annealed (which they will do once you start using your brakes). All (well, most, since less steel means lighter rotors) in the name of cost-cutting.
#742 of 1420 Warped rotors on 2002 Protege5
Mar 10, 2005 (2:57 pm)
"All too common on later-model cars, not just the Protege."
Are you saying that many two or three year old cars have warped rotors? I find that surprising! If you drive reasonably and maintain your car properly shouldn't the rotors on cars like the Protege last longer than that? My lowly 1991 Corolla had its rotors resurfaced once in 10 years before I sold the car. Maybe I should have kept that buggy!
#743 of 1420 Please give you post a title.
Mar 11, 2005 (6:25 am)
My 2002 P5 warped it's rotors after about 15k miles. They machined them under warranty. Have been fine since and I'm up to 43k.
#744 of 1420 Warped rotors
Mar 11, 2005 (8:14 am)
I guess the problem here is you can't tell how the previous owner drove this car. Maybe the rotors where slightly warped when you bought the car but now they are just worse. I would talk to the place you bought the car and ask if they can do anything for you. They might say no but its worth your time to ask.
I believe most rotors on cars today are not what they were 10 years ago. You can thank cost savings if you want.
My P5 has almost 150,000kms on my original pads/rotors and no problems yet.
#745 of 1420 Warped rotors.
Mar 11, 2005 (8:50 am)
The rotors on my '89 323LX were fine for the 142k miles I put on it.
The rotors on my '99 ProLX are fine at 60k miles.
However, I've been hearing about warped rotors with more frequency now than before. Part of it may be the increase in use of the internet, making it easier to communicate. However, even on sites that have been tracking consumer complaints (like NHTSA's) seem to report more complaints about warped rotors.
I think rotors on older cars were thicker than they had to be. With newer cars, parts are made lighter for many reasons, and I think that some rotors have much less safety margin than they did before (the less steel, the hotter the rotor will get since there's less total heat capacity, everything else being held constant). Not to say they'll all fail, just that more of them as a percentage of total units in the field will fail.
And steels have a "grain" to them, which will affect the geometry of parts made from them. This is epecially true if the block you made the part from wasn't annealed before you started cutting on it. Both annealing and heat-hardening use heat to change the hardness and grain structure of steels, just at different temperatures and rate of change of temperature. We've had to junk some tool inserts because they changed too much when we had them hardened. Of course, those were made of different steels (H-13, S-7, P-20 or equivalent) than the type usually used in brake rotors (usually low-carbon steel), but the steel used in rotors will react in a similar fashion.
Mar 11, 2005 (1:58 pm)
Wow, some of the numbers you all have been quoting are tremendous. But the winner has to be Chow-Chi (mazdafun)!
Chow-Chi (mazdafun) said:
"The rotors on my '89 323LX were fine for the 142k miles I put on it. The rotors on my '99 ProLX are fine at 60k miles."
Derek (cdnp5) said:
"My P5 has almost 150,000 kms (90,000 miles) on my original pads/rotors and no problems yet."
Raymond (meinrad) said:
"My 2002 P5 warped it's rotors after about 15k miles. They machined them under warranty. Have been fine since and I'm up to 43k."
I'm hoping my 2002 P5 gets to join this club.
#747 of 1420 Re: Warped rotors [cdnp5]
Mar 18, 2005 (7:01 am)
I am the original owner of my 2002 p5 and just had to have the rotors & pads replaced. Unfortunately at 31000 miles I was over warranty. They said the rotors were grooved. I couldn't believe it. I am usually a not hard braker and have always owned the car.
One thing I have noticed though since I got it back last night is that it doesn't really brake very well (feels just like new - so it never did). During rush hour, on occassion, you do have to brake a little harder - when that happens you can actually feel the brakes "dig in". So I'm going to wait two months and take the car back to ask them to check it. I think something is fishy here.
#748 of 1420 Fresh rotors and braking force.
Mar 24, 2005 (8:45 am)
A fresh set of either will initially feel weaker as the pads and rotors haven't conformed to each other. However, after several hard stops (or several more moderate stops), the braking force offered by them should increase.
If not, you should have them inspect them for any problems in the system (too little boost, air in the lines, stuck piston or caliper).
I think the brakes in my Pro LX are good, and the ones in my wife's P5 are a bit on the strong side (I have a little more difficulty modulating them, but they sure feel like they stop the car a lot faster), like those in the 6 and 3.
#749 of 1420 Transmission problem
Mar 28, 2005 (4:04 pm)
I have an automatic 2002 Protege 5 and drove it for less than 30000 miles. Friday I was driving on the highway and suddenly my transmission started to shift erraticaly. It would appear to go to neutral for a second, than back in O/D, than OK for a while, than the same problem again. It's not doing it a low speed. Only above 50 mph. I left it with a dealer and was told that I probably had to replace the transmission! Of course, my warranty expired 4 weeks ago... Is there anyone out there that had similar problems? I don't think it's normal for a 3 years old car to have that kind of problem. I will call the dealer back today and see what they are proposing. I am in CA but have a Canadian car so they don't have it in their database.