Lee Nguyen

Hi guys, so my G starts to make the squeaking sound whenever I brake, so I guess it's time to put on the new pads or maybe even new rotors. I looked on tirerack. com to finds the pads first, and I got confused about the sizes of pads . I really have no ideas what sizes they are, and mine is just the base 2012 G37 Sedan, no S, X, Sport or Journey. Also, what brands I should go for my G since this is the first Nissan/Infiniti I've ever owned. I really appreciate helps, suggestions and information from you guys. Thank you very much.

Melophile

320mm for the fronts.
307mm for the rears.

For rotors, most users recommend Centric Premium rotors.
For brake pads, most users recommend Centric Posi-Quiet Ceramic pads.
These are similar to OEM, if not, better.

Parts numbers:
Centric Premium Rotors:
Front - 120.42080
Rear - 120.42088

Centric Posi-Quiet Ceramic Pads:
Front - 105.08880
Rear - 105.09051

They also come in axle-packs (rotors + pads):
Front - 909.42001
Rear - 909.42501

Or if you want the full package, everything included:
Front + Rear - 906.42001

Based off of my searches, CariD has the cheapest prices.
=> https://www.carid.com/2012-infiniti-...%5B%5D=Centric

Lee Nguyen

Thank you. Also, do I have to do the brake bedding process for them? I never used them before, so I don't really know though. Thank you.

blnewt

iTrader: (13)

Posi Quiet ceramic pads don't require a bed-in

Lee Nguyen

Really? I thought all pads need though? I mean I don't really know. I changed the OEM pads on my 13 Accord and 20 Tacoma, and they worked fine right out of the boxes for almost 2 years now. Recently, I just changed the PowerStop pads for a 13 Camry, and they worked fine for 1 week, then they started to make a noise such as the noise of 2 metal pieces running on each other. I contact autoanything, and they said I didn't do the bed in correctly .

Lee Nguyen

So now, I am really scared to change any aftermarket pads, and I heard that Infiniti OEM pads aren't that good. So yea, don't know what to do now LOL.

blnewt

iTrader: (13)

Lee, how many miles on your G? Might just need to grease the moving parts on your brake system. Apply CRC caliper grease (or something similar) to the pad backing plates, with a thin coat between the shim and backer, and the sliders. Do you know how much pad thickness you have at the moment?

Lee Nguyen

I bought this G used with 46k miles on it, and it has 48k now, and to be honest that I have no idea how hard the old owner had pushed this car though . Every time I brake, I can feel a vibration in the rear wheels and a little bit in the front wheels. I haven't open the calipers to check.

blnewt

iTrader: (13)

Vibration could be uneven pad deposits, that's more often the case than a rotor run-out problem, here's a good link on that~
-Warped- Brake Disc and Other Myths

You might want to try a few hard braking cycles to scrub your rotors, go from 60 down to 10 mph about 4-5x as fast as you can safely slow down without coming to a complete stop, obviously you'll have to find a nice open stretch of road to do this. If that decreases vibration issues you've likely found the culprit.

And checking brake pad thickness is something I'd do ASAP.

Lee Nguyen

I will give this a try tomorrow or so and will let you know how it turns out. And yea, I will try to check the thickness of the pads as soon as I can. Thank you .

Lee Nguyen

So I gave it a try and didn't work out; I can't remember how many times, but my gas tank went down a quarter LOL. Now, sometime I can hear the squeaking noise without stepping on the brake pedal when the car moves slowly on itself. I just ordered the brake kit that @Melophile showed above, and I hope I am not going to mess it up because of the "bed in process".

blnewt

iTrader: (13)

Check the 4th question down, the Posi Quiets will set in fine without performing bed-in vs. their performance pad line.
FAQ's

Lee Nguyen

Thank you @blnewt. You're awesome

blnewt

iTrader: (13)

No problem, hope your new brake set works out well.

RMB5190

iTrader: (2)

I have the centric Posi and premium rotors and did not perform a bed in. Been running them for about 7k miles now, give or take. Braking is butter smooth but I did notice a squealing/squeaking as you mentioned when I first put them on. Took apart the assembly the sound was coming from, re-greased and cleaned the cylinder with a wire brush. Pull back the rubber boot and get as much as you can. Squealing went away after that.