2020-2024 Nissan Sentra Brake Job Guide: Symptoms, Costs and the Right Parts

By Core Brake Parts Tech Team — Circleville, OH warehouse

A brake job on a 2020-2024 Nissan Sentra almost always starts at the front: the 11.0-inch vented front rotors and their pads do most of the stopping and wear first. What happens at the rear depends on trim, because the base Sentra S uses 9.0-inch rear drums while the SV and SR use 10.2-inch rear discs, so confirm your trim before you order a single rear part.

How the 2020-2024 Sentra Brake System Is Laid Out

This generation of Sentra launched for 2020 and was refreshed for 2024, and Nissan's specification sheets for both years show the same basic hardware. Every trim gets power-assisted brakes, 4-channel ABS with four wheel-speed sensors, Electronic Brake force Distribution and Brake Assist. The parking brake is a conventional foot-applied pedal, not an electronic parking brake, which keeps rear service simple: no scan tool is needed to service the rear brakes.

The rear discs on the SV and SR are thin (0.31 inch), which matters later: there is very little material to machine, so worn rear rotors are usually replaced rather than resurfaced. The front rotors are the same size across all trims, so front pads and front brake rotors are shared whether you drive an S on steel wheels or an SR on 18-inch alloys. Still, match parts to your VIN or trim, because rear parts are not interchangeable between drum and disc cars.

Symptoms Your Sentra Is Due for Brakes

Nissan builds audible wear indicators into the disc brake pads. According to the owner's manual, when a pad needs replacing you will hear a high-pitched scraping or screeching sound while the car is moving, whether or not your foot is on the brake. That constant squeal while cruising is the clearest sign the front pads (or the rear pads on an SV or SR) are down to the indicator tab. The manual also notes that an occasional squeak during light to moderate stops can be normal, so the key difference is a noise that persists without braking.

Other signs to watch for:

• Grinding or a metallic scrape - the pad friction material is gone and the backing plate is cutting the rotor. At this point the rotors are almost certainly scrap.
• Pulsation in the pedal or steering wheel when stopping from highway speed - usually uneven rotor thickness or pad deposits on the front rotors.
• A low or soft pedal, or a pedal that sinks - check the fluid level and look for leaks at the calipers, wheel cylinders and lines before assuming it is pads.
• The brake warning light on with the parking brake released - on this car the same light warns of low brake fluid, which often just means the pads have worn and the level has dropped.
• A parking brake that needs more pedal travel than it used to - on drum-equipped S models the rear shoes may be worn or the adjusters sticking.

What Wears First, Front vs Rear

Like nearly every front-wheel-drive compact sedan, the Sentra puts most of its braking force on the front axle, so front pads typically wear out well before the rears. Many owners will do two or more front pad jobs before the rear axle needs attention. How long either lasts depends heavily on driving: stop-and-go city commuting and hilly routes wear pads far faster than highway miles.

On the SV and SR, the rear disc pads wear slowly, but the thin rear rotors and the rear caliper slide pins are prone to rust and sticking in wet or salted-road climates. A rear caliper that does not release cleanly can wear one pad down quickly while the other looks new, so always inspect both pads on each side.

On the S, the rear drums use brake shoes that last a long time. The owner's manual notes that rear drum brakes self-adjust every time the parking brake is applied, so if you rarely set the parking brake, the shoes can drift out of adjustment and the pedal can feel lower than it should. Setting the parking brake regularly helps keep the rears adjusted.

What to Replace Together

A proper brake job is more than dropping in new pads. Here is what to plan for on each axle:

• Front axle (all trims): pads, and rotors if they are scored, below minimum thickness, or causing pulsation. Replace pads and rotors in axle pairs, both sides at once. A matched brake pad set with new rotors gives the best pedal feel and the quietest result.
• Hardware: new abutment clips, pad shims and slide pin boots. Clean and lubricate the slide pins with a brake-specific grease. A brake hardware kit is inexpensive and prevents most rattles and uneven wear.
• Rear axle, SV and SR: rear pads and rotors as a set, plus hardware. Given how thin the rear rotors are, resurfacing is rarely an option.
• Rear axle, S: brake shoes, springs and adjusters, and the drums if they are scored or worn past the limit cast into them. Check the wheel cylinders for leaks while the drums are off.
• Calipers: only if a piston is seized, a slide will not free up, or the caliper is leaking. See replacement brake calipers if yours fails inspection.
• Brake fluid: Nissan's maintenance schedule for the Sentra calls for replacing the brake fluid every 20,000 miles or 24 months under standard conditions, and every 10,000 miles or 12 months under severe conditions. Use Genuine NISSAN Brake Fluid or an equivalent DOT 3, as the owner's manual specifies. Doing a flush during a brake job is efficient because the wheels are already off.

The owner's manual also calls for a parking brake break-in whenever the parking brake shoes or the drums or rotors are replaced, following the procedure in the factory service manual. Do not skip it, or the parking brake may not hold as well as it should.

How Hard Is the Job, and What Drives the Cost

A front pad and rotor job on this Sentra is one of the more approachable brake jobs for a home mechanic: remove the caliper, then the caliper bracket, and the rotor comes off the hub. Rust between the rotor and hub is the most common delay. Torque every fastener, including the caliper bracket bolts and lug nuts, to the values in the factory service manual, and tighten lug nuts in a star pattern.

The SV and SR rear disc job is similar in difficulty. Because the parking brake is a mechanical foot pedal rather than an electronic motor on the caliper, no scan tool is needed. Some rear calipers with a cable-operated parking brake built in need the piston wound back with a caliper piston tool rather than pushed straight in, so check which design your car has before you start. The S model's rear drums take more patience: springs, adjusters and shoes have to go back in exactly the right order, so take a photo of one side before you take it apart.

Cost comes down to a few variables rather than a single number:

• Pads only vs pads and rotors. Adding rotors raises the parts cost significantly, but skipping them when they are worn usually leads to noise, pulsation and a second job sooner.
• One axle vs both. Most visits are front-only. Doing both axles at once roughly doubles the parts and adds labor.
• Drum vs disc rear. Rear shoe jobs on the S are cheap in parts but slower in labor; SV and SR rear disc jobs are faster but need rotors more often.
• Extras. A fluid flush, a seized caliper, or rusted slide pins add parts and time.
• DIY vs shop labor. Parts are a fraction of the bill when a shop does the work, which is why many owners do front pads and rotors themselves.

Recalls and Other Checks While the Wheels Are Off

A check of NHTSA's recall database shows no brake-system recalls for the 2020-2024 Sentra. The steering recalls on 2020-2022 models (NHTSA campaigns 21V461 and 23V581) involve tie rods that may be bent. Since the wheels are already off during a brake job, it is a good moment to look at the tie rods and have a Nissan dealer run your VIN for any open recalls. Also inspect the flexible brake hoses for cracks or bulging and the ABS wheel-speed sensor wires for damage.

Frequently Asked Questions

Does my 2020-2024 Sentra have rear disc brakes or drums?

It depends on trim. Nissan's specifications list 9.0-inch rear drums for the Sentra S and 10.2-inch rear disc brakes for the SV and SR. All trims have vented front discs.

Do I need a scan tool to change the rear brakes?

No. The 2020-2024 Sentra uses a foot-operated parking brake pedal, not an electronic parking brake, so there is no motor to retract with a scan tool.

What brake fluid does the Sentra use?

The owner's manual specifies Genuine NISSAN Brake Fluid or an equivalent DOT 3 fluid. Nissan's maintenance schedule calls for replacing it every 20,000 miles or 24 months under standard driving conditions.

Why do my brakes squeal even when I am not pressing the pedal?

That is most likely the pad wear indicator. Nissan says the pads make a high-pitched scraping or screeching sound when they need replacing, whether or not the pedal is pressed. Have the brakes checked promptly.

Are front rotors the same on the S, SV and SR?

Nissan lists the same 11.0-inch by 0.9-inch vented front rotor for all three trims, so front rotor size does not change with trim. Always confirm fitment by year and VIN before ordering.

Should I replace rotors every time I replace pads?

Not automatically. Replace rotors if they are below minimum thickness, deeply scored, or causing pulsation. On the thin rear rotors of the SV and SR, replacement is usually the practical choice.

Sources

1. Nissan USA Newsroom - 2020 Nissan Sentra Specifications - front 11.0 x 0.9 in vented discs, rear 10.2 x 0.31 in disc or 9.0 in drum by trim, ABS, EBD, Brake Assist, foot parking brake
2. Nissan USA Newsroom - 2024 Nissan Sentra Press Kit - refreshed 2024 Sentra keeps the same brake sizes, rear drum on S, rear disc on SV and SR, foot parking brake
3. Nissan USA - 2022 Sentra Owner's Manual - DOT 3 fluid, audible pad wear indicators, drum self-adjust with parking brake, parking brake break-in, brake warning light
4. Nissan USA - 2021 Sentra Brake Fluid Maintenance Schedule - replace every 20,000 miles or 24 months, or 10,000 miles or 12 months severe
5. NHTSA - Nissan Sentra Recalls - tie rod recalls 21V461 and 23V581, no brake-system recalls listed