My back brakes are making noise, what type of brake pads are used on QX56 infinity 2005

I have heard that Toyota's are sensitive to off brand brakes. IF you did not use Toyota brake pads, you might need to wait and see if it goes away with time. If not use Toyota pads.

check the pads , depending on the miles on your vehicle, they may have excessive wear and may need replacement, most shops will do a free brake inspection for you , but go to someone you trust

check your brake fluid levels, if low there may be a leak in the system. If ok, check the ABS system for malf.

May be the grade of pad that was used in replacement,Would find out if ceramic brake pad is available for this vehicle.They usually cost a little more but provide better perfomance typically less noise issues and create less brake dust.

Depending on the quality of pad used you may get some noise from the brakes mainly squeaks. Grinding or chattering is unusual though. Id take it back to the place that installed the pads/shoes and have them check it out again. Do you get a vibration while braking?

Did you bump the ABS pickup at the wheel hub when you changed the brakes? Or are the wires maybe nicked? The noise is normal and might go away depending on the brake pad type you replaced with. The ABS problem might be caused by you.

Brake booster or brake booster sensor

Some pads are more prone to this condition than others. The best fix is to make sure the mechanic used a lubricant on the back of the pads before installation. This will reduce some brake "chatter", and in most cases cure this problem...Good Luck!

The rear brakes should last from 30000 to 60000 miles or 50000 to 100000 kms. So something is wearing out your brakes too fast. Are you doing the work or some shop. I also assume you have discs and not drums since you mention pads and calipers. I am not certain but usually you need a tool to turn the pistion in when putting in new pads. I would make sure the pads are releasing properly by raising rear of car, stepping on brakes a few times (with engine off and try see if wheels are free by spinning by hand, also try to use handbrake a few times and release it and see if wheels spin freely. Maybe rears always applied. Notice burning smell, are discs glazed from heat? Are you using really cheap pads. Also check the proportioning valve which will decrease pressure to rear brakes during hard braking. Do you notice rear wheels squeling during hard braking. Do you have antilock brake system? Also are you using good quality pads and rotors.

The Brembos that come on Type S/Manual models wear fast. I've changed them at 20,000 miles. They are expensive also.

Non-Type S/Manual models I have seen go 80,000 miles. The biggest factor on brake wear is how the vehicle is driven.

At 50,000 miles I would have them inspected. Depending on where you go, make sure you get an accurate measurement of both pads (inboard and outboard). 2mm is the service limit and about that time the indicators start making noise, but not always. Most indepent shops are going to sell you brake pads at 4mm. That's another 10,000 miles at least you could have driven on them.

Never replace just the brake pads, resurface or replace the rotors. The uneven surfaces of the rotor will cause your new pads to wear incorrectly and possibly cause brake noise. Most aftermarket pads will cause a squeel.