Rear brakes gone at 15k..

I got a bottle of some Mobil 1 Synthetic grease, will that do?

I only recommend synthetic lube specifically made for high temperature brake usage. I have used Sil-Glyde for many years without fail. If you go to an auto store, they should have it, or similar on their counter.
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What is the torque rating on the caliper bolts? (front vs back)

The 2016 with the E-Brake in the back. How does that come off?
 
I only recommend synthetic lube specifically made for high temperature brake usage. I have used Sil-Glyde for many years without fail. If you go to an auto store, they should have it, or similar on their counter.
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CRC makes a good brake grease, been using it for years.https://www.amazon.com/dp/ (commissions earned)
Thanks for the response guys. Guess I'll go buy some brake specific grease. Now I have to do research on both of these. They both have good reviews. I also saw some ceramic brake grease from Permatex in those single serve ketchup packets for like $1.25. Maybe I will buy 2 since I don't intend on doing more than 1 brake job every 2 years.
 
I've been saying for 2 years. My post #19 of this thread shows my less than 1000 mile brakes didn't have much lube on it, or inside the caliper body pin holes. And the grease was a dry solid. It's very easy to add some Syl-Glide or silicone brake lube of choice to these pins. 24,000 miles later and all my pads look nearly new.

I agree, I've been doing this for years with all my vehicles as preventative maintenance and I have never had a caliper freeze on me, including my two Mazda's.
 
So turns out my pins were bad...one side was stiff and the other frozen...I checked both rears before winter, both slid in and out like they should and had the boots tightly sealed so...salt is getting past what appears to be a tight seal and corroding the pins til they seize..this is a bad design and needs a recall imo.

Anyone suggest a good caliper? Mazda oems gotta go...
 
So turns out my pins were bad...one side was stiff and the other frozen...I checked both rears before winter, both slid in and out like they should and had the boots tightly sealed so...salt is getting past what appears to be a tight seal and corroding the pins til they seize..this is a bad design and needs a recall imo.

Anyone suggest a good caliper? Mazda oems gotta go...

When you checked the calipers the last time, did you re grease the pins?
If there was an abundant amount of silicone grease on the pins and the boots were tight against the ends it would have sealed the area for salt to get in.
It was not the OEM Mazda calipers or design that was the problem. It was most likely the lack of amount of lube from the factory. Your next set of calipers, OEM or not, will do the same thing if there isn't a lot of grease in there to lube and seal out contaminants.
 
When you checked the calipers the last time, did you re grease the pins?
If there was an abundant amount of silicone grease on the pins and the boots were tight against the ends it would have sealed the area for salt to get in.
It was not the OEM Mazda calipers or design that was the problem. It was most likely the lack of amount of lube from the factory. Your next set of calipers, OEM or not, will do the same thing if there isn't a lot of grease in there to lube and seal out contaminants.

No I didnt pull them out of the boots...they slid freely..They were replaced/serviced at 15k miles when my factory brakes failed so at the time they only had about 6k miles on them since a certified mechanic put everything back together..He followed the TSB which said basically replace damaged parts and lube..
 
Your next set of calipers, OEM or not, will do the same thing if there isn't a lot of grease in there to lube and seal out contaminants.

One thing I noticed about the boots is they slid off way too easy..I should have to fight them with everything I have or even use a small pry tool to get them off...not these, slide right off...No wonder salt water penetrates them so easily and so many people in snow states are having corrosion issues...again this is a bad design.

Also the old pads were wedged in way too tight..had to beat them out...rust underneath the clips made them tighten up.

So I cleaned under the clips and filed down the new pads for proper fit...one big rusty mess.
 
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Good day,

I have 24,000km on mine and the dealer said yesterday the rear brakes have 4.5mm of wear left on it (which put it at 30-50% on their chart) and I'd need new brakes. I found this difficult to take with such low mileage and went reading around on here to see what I could find out.

I was quite skeptical that the annual maintenance (B?) requires brakes to be lubricated and such for quite a bit of money. I thought I'd have it done because if it saves replacing brakes then it might be worth it. Well it certainly doesn't feel worth it at all, if the brakes last less time. If they were lubricated at the annual maintenance (last August) you would think the bolts wouldn't be the cause of the premature wear.

If I was hard on brakes I'd be prepared for this but I don't believe I am. Especially since I feel I have gotten use to the automatic transmission and know how to use the downshifts to save brake wear (and go around corners without using brakes at all). Anyhow, I'm going on here, out of utter annoyance which I've dragged you into now! If it helps the conversation the front brakes are still in the "green" zone at 6mm.

Does anyone know what 4.5mm means overall - what's a new pad thickness?

Regards,
Paul
 
Hello from Canada,

Same problem here, 42720 km (26545 miles) and the rear break are gone. 1 pad got stuck in the caliper (because of rust winter and salt on the road) closer to the disk while touching it. The disk did overheat and the surface is not linear anymore and it did wear out that pad. The other is ok but I have to replace both now. Mazda Canada refuse to provide any assistance even though I have done all of the maintenance required at the Mz dealer. I was told that this is normal and they won't cover anything. Mz rep on the phone just flush me away, she didn't care at all. Even after break cleaning and lube at 24000 km, 18000 km later (one year) pad is totally jammed and disk is almost dead. So. in my book Mz cheap out in the quality of the components and the owners are paying the price after ... Far from sure that I'll get another Mz ....
 
At my last oil change (1.6 years old, 25,000 km) I was told I'll need new rear brakes. I told they service manager that seemed crazy to me and he said they'll take a look at it in August at the 2nd year annual service. I don't have the measurements handy.

Last year I went against what most people say and did the "brake maintenance" for an extra $100 or so with the annual maintenance. I thought if it gets me more life then it would be worth it. Well if I need new brakes in August (will be about 30,000km) then that is definitely not worth it at all.

These days rotors seemed to be replaced every time - does it matter if you run the brakes until the squealers come on? In years past I was told not to let that happen as it would screw up the rotors but I think that is just a line of bs perhaps. Of course we all want good braking and don't want to cheap out on the most important part of the car.
 
I've owned my CX-5 for just over 3 years. At the 15,000 mile service the dealer did a mandatory brake breakdown and re-lub. 2 years later, and with no similar service suggested, at the end of the second year of ownership I was not noting any brake issues and they hadn't even measured pad thickness at any of the subsequent oil changes. Now, at 25,000 miles I have just had an oil change and "major" maintenance service. The dealer tells me I will need new pads and rotors on all 4 wheels as the pad thickness is down to 3 mm(~1/8 inch)!! How can this be. I don't ride my brakes. I've owned 6 previous vehicles(various brands) and not one of them had to have pads replaced in anywhere this short a time. I read about the CX-5 TSB for 2013-2014 model years where salt corrosion can cause the outside rear pads to wear prematurely, due to rusting clips/sliders causing pad binding, but 25,000 miles...this is not acceptable!! I am beginning to think that, like the fast wearing TOYO tires I used to have, Mazda has put on lower quality pads, clips and/or sliders at the factory, like some others have suspected.
 
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I decided to get another opinion on the wear on my brakes, so today went to an independent tire/brake specialist. They took my wheels off and showed me the wear on the pads. Instead of the 3mmm(~1/8 in) remaining on all pads as reported by Mazda, the brake guy today showed me that my front inner pads(piston side) were considerably more worn than the outer pads, 3mm vs 7 mm left on the outer pads. So over twice as much pad left on the outer front pads as compared to the inners!!!Now the rear pads had almost 5mm left on the outers as compared to 4mm left on the inner pads. So the rears showed quite similar wear on both inners and outers. SO, what is going on with the front pads!!! There wasn't any rust on the clips as they were still well lubed. I suspect the caliper pins would still be well lubed as well. Does anyone know why the inner front pads would wear so much. I thought that others on this Forum had said that the outers usually wear faster than the inners. DEFINITELY the opposite in my case. Both the front and rear rotors showed very little wear in my opinion yet the brake guy said that as a matter of course these days they usually replace the rotors when they replace pads.
 
This won't help you kdaug but your replies brought my post back to my attention. Since my April dealership visit I was back 2 more times. In April the pads measured by the dealer at 4-5mm and soon needed to be replaced. In August pads measured by dealer were at 6mm and showed as "Good" on the report... then in December the pads showed 5mm and "Good" on report. So I haven't done anything with brakes yet.
 
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I went back to my dealer 2 days ago to talk to them again about what I considered premature wear at (~25,500 miles) on both my fronts and rears, but particularly my inner fronts. They looked up my service record to note that I came in for the $100 brake service at the end of my first year (~9,500 miles) but did not come in at the end of my second year of ownership, and that probably caused the problem of a potentially ceasing caliper. They serviced my calipers at my recent service(~25.500 miles) but did not mention that the calipers were ceasing. So, how could they cease last year (and prematurely wear my inner front pads) but not still be ceasing up now?? More importantly, if they were so insistent that I get my brakes serviced at the end of the 1st year why did they NOT even ask me to have them serviced at the end of the 2nd year?? The service manager sure seemed to be alluding that it was my fault for not bringing it in for brake servicing at the end of year 2. Now as I have previously mentioned, in the 5 vehicles that I have previously owned, I never once had ceasing calipers or premature brake wear, and I had kept some vehicles at least 10 years. It's looking more like poor quality Mazda oem brake pads and/or calipers!!
 
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