I could hear brakes mashing on the rotors

Hi,

Replacing the brake pads isn't too hard to do. Usually, one can expect them to last around 25,000 miles, but that is based on the driver and how the brakes are used.

As far as replacement, here is a link that explains in general how to replace them. You can use this as a guide.

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

Here are the directions specific to your vehicle. The attached pics correlate with the directions.

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2016 Nissan-Datsun Sentra L4-1.8L (MRA8DE)
Front Brake Pad - Removal and Installation

REMOVAL
WARNING: Clean dust on brake caliper and brake pad with a vacuum dust collector to minimize the hazards of airborne particles or other material.

CAUTION:

Do not depress the brake pedal while removing the brake pads because the pistons may pop out.
It is not necessary to remove bolts on torque member and brake hose except for disassembly or replacement of brake caliper. For brake pad removal, hang brake caliper with a wire so as not to stretch brake hose.
If brake fluid or grease adheres to the brake caliper or disc rotor, quickly wipe it off.
Partially drain brake fluid from the master cylinder. Refer to Drain and Refill.
Remove front wheels and tires using power tool. Refer to Removal and Installation.
Remove sliding pin bolts.
Remove the brake caliper from the torque member. Leaving brake hose attached, reposition the brake caliper aside with wire.
Remove the brake pads, shims, shim covers and pad retainers from the torque member.
CAUTION:

Do not deform the pad retainer (2) when removing the pad retainer from the torque member

pic 1

Do not damage the piston boot.
Do not drop the brake pads, shims, and the shim covers.
Note the position of components during removal to aid with installation.
INSTALLATION
Install the pad retainers (1) to the torque member (2) if the pad retainers have been removed.

pic 2

CAUTION:

Do not deform brake pad retainers.
Verify pad retainers are secured properly to torque member.

Apply Molykote AS880N or equivalent to the mating faces (A) between the inner pad (1) and the inner shim (2), and install the inner shim and inner shim cover (3) to the inner pad.

pic 3

CAUTION: Always replace the shim and shim cover when replacing the brake pad.

Apply Molykote AS880N or silicone-based grease to the mating faces (A) between the outer shim (1) and the outer shim cover (2), and install the outer shim and outer shim cover to the outer pad (3).
image
CAUTION: Always replace the shim and shim cover when replacing the brake pad.

Apply Molykote 7439 or equivalent to the mating faces (A) between the brake pads (1) and the pad retainers.

pic 4

Install the brake pads to the torque member.
CAUTION:

Both inner and outer pads have a pad return system on the pad retainer. Install pad return lever (1) securely to pad retainer (2).

pic 5

Do not deform the pad retainers.

Using a suitable tool, press piston into the brake caliper.
CAUTION: Do not damage the piston boot.

Install cylinder body to torque member.
Install the sliding pin bolts and tighten them to specified torque.
Depress the brake pedal several times to verify that drag does not exist.
Install front wheels and tires. Refer to Removal and Installation.

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I hope this helps. Let me know if you have other questions.

Take care and God Bless.

Joe

Hello, I'm Danny.

Here is the information you requested. Here is a tutorial showing how to replace the front brake pads and rotors:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

I've attached picture replacement steps below on how to replace the brake pads on your car including how to inspect the rotors for wear. Hope this helps and thanks for using 2CarPros.