2002-2015 Nissan Altima Front vs Rear Brakes: What Wears First and What to Replace

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 2002-2015 Nissan Altima the front brakes almost always wear out first, because the car's weight shifts forward every time you stop and the front brakes do most of the work. The rears still wear, and on these cars they are discs, not drums, so check all four corners at every pad job and replace parts in axle pairs, front and rear on their own schedules.

How the Altima brake system is laid out

Every Altima in this 2002-2015 span uses disc brakes at both ends. Nissan's 2010 and 2014 Altima owner's manuals both state that the front and rear disc-type brakes self-adjust every time the brake pedal is applied, and fitment data for the 2002 and 2006 cars lists a rear disc brake type across the Base, SE, SL and SE-R trims. There is no rear drum-and-shoe setup to worry about on this range of Altimas.

The layout is conventional: a master cylinder under the hood pushes brake fluid through steel lines and rubber hoses to a caliper at each wheel, and the caliper squeezes two pads against a rotor. The front brakes are sized larger than the rears because they carry the bigger share of the load. The parking brake works on the rear wheels. On the 2014 car it is a foot pedal, and the 2010 manual shows either a foot pedal or a hand lever depending on the model.

Nissan specifies Genuine NISSAN Super Heavy Duty Brake Fluid or an equivalent DOT 3 fluid in both the 2010 and 2014 manuals, and that is the fluid to use when you top off or bleed after a caliper or hose job.

Why the front brakes wear first

When you brake, the car's weight pitches forward onto the front tires. Wagner explains it plainly: because braking shifts the vehicle's weight forward, the front brakes do most of the work. The Altima is also a front-engine, front-wheel-drive sedan, so the nose carries more weight even when the car is standing still. More weight and more braking work at the front means more heat and faster pad and rotor wear up front.

That does not mean the rears last forever. Bendix points out that on modern cars with electronic brake force distribution and stability control, the system applies the rear brakes on its own to keep the car settled, and rear pads can wear much closer to the front rate than the old rule of thumb suggests. Altimas in this range that have Vehicle Dynamic Control fall into that category, so do not assume the rears are fine just because the fronts were done last time.

Symptoms and how to tell which end needs work

Nissan puts audible wear indicators on the Altima's disc pads. The owner's manual describes a high-pitched scraping or screeching sound heard while the car is moving, whether or not you are on the brake pedal. That steady squeal while cruising is the pads telling you they are near the end. Nissan also notes that occasional light squeak during gentle stops can be normal, so the key difference is a constant scrape that does not go away.

To figure out which end is making the noise or doing the shaking:

• Steering wheel shake when braking usually points to the front rotors, because the front wheels connect to the steering.
• Pulsation felt through the seat or pedal, not the wheel, often comes from the rear rotors.
• Grinding metal-on-metal means the pad is gone and the backing plate is cutting the rotor. Stop driving on it and inspect right away.
• Pulling to one side can be a sticking caliper or a collapsed hose.
• Brake warning light on with the parking brake off can mean low fluid. Check the reservoir before anything else.

The fastest check is to look through the wheel spokes at the outer pad and compare front to rear, then pull the wheels for a real look at both inner and outer pads. Inner pads often wear faster than outers when a caliper slide is dragging.

The brake fluid warning light and worn pads

This one catches a lot of Altima owners off guard. As pads wear, the caliper pistons move out and brake fluid moves from the master cylinder reservoir into the calipers, so the reservoir level drops. Nissan addressed this in a service campaign letter to Altima owners (NTB12-011), explaining that the falling fluid level from pad wear can light the brake warning lamp, and that this is a normal condition. That campaign covered a pad wear check, a fluid top-off, and replacement of the master cylinder only if a leak was actually found.

The takeaway: if the red brake light comes on with the parking brake released, check the fluid level and check your pads. A low reservoir on an Altima with worn pads usually means pads are due, not that you have a leak. If the level keeps dropping after new pads, or you see wetness at a wheel, hose or behind the master cylinder, then look at replacement master cylinders, hoses and calipers. Avoid topping a low reservoir all the way to MAX right before a pad job, because pushing the pistons back for new pads sends that fluid back up and can overflow it.

What to replace, and what to replace at the same time

Pads and rotors are wear parts, and they are always replaced in pairs across an axle so both sides grip evenly. Here is how to plan an Altima brake job:

• Front pads and rotors: the most common job. New rotors with new pads give the pads a clean, flat surface to bed into and cure most pedal pulsation. Browse brake pads and brake rotors by vehicle fitment.
• Rear pads and rotors: inspect them every time the fronts are done. If the rears are well worn, doing them at the same visit saves a second teardown.
• Hardware: abutment clips and slide pin boots keep pads moving freely. A brake hardware kit is cheap insurance against uneven pad wear and squeal.
• Calipers: replace a caliper if the piston is seized, the boot is torn, or it leaks. A dragging caliper is a common cause of one pad wearing much faster than the others. See brake calipers.
• Brake fluid: bleed with DOT 3 after opening any hydraulic line. If the fluid is dark, a full flush is worth doing with the brake job.

If both ends are due, a front and rear pad and rotor kit is the simplest way to get matched parts in one order. Start at all brake parts and filter for your Altima's year and trim, since pad and rotor sizes differ between generations and between the four-cylinder and V6 cars.

How hard the job is

A front pad and rotor job on an Altima is a solid do-it-yourself job for anyone with a jack, jack stands, a torque wrench and basic hand tools. Remove the caliper, hang it so it does not stretch the hose, remove the caliper bracket, swap the rotor, clean and lubricate the slides, install pads and reassemble. Torque the caliper bracket bolts, caliper bolts and lug nuts to the values in the factory service manual.

The rear job is similar, with one extra step to watch. Because the parking brake works on the rear, some rear caliper designs need the piston turned back into the bore rather than simply pushed. Check how your specific caliper retracts before forcing anything. Make sure the parking brake is released while you work, and confirm it holds the car afterward.

After any pad job, pump the pedal several times before moving the car so the pistons come back out to the pads, recheck the fluid level, then bed the new pads with a series of moderate stops. As Nissan's manual notes, avoid resting your foot on the brake pedal while driving, which overheats the brakes and wears pads faster.

Frequently Asked Questions

Does the 2002-2015 Nissan Altima have rear drum brakes?

No. Nissan's owner's manuals describe front and rear disc brakes, and fitment data for the 2002 through 2006 cars lists a rear disc brake type. Every Altima in this range uses rear discs and pads.

Should I replace front and rear brakes at the same time?

Only if both are worn. Fronts usually go first, but inspect the rears at every front job. On cars with stability control the rears can wear faster than you expect, so measure rather than guess.

Why is my brake warning light on after the pads got low?

As pads wear, fluid moves from the reservoir into the calipers and the level drops. Nissan's own campaign letter to Altima owners describes this as normal. Check pads and fluid level, and look for leaks if the level keeps falling after new pads.

What brake fluid does an Altima use?

Nissan specifies Genuine NISSAN Super Heavy Duty Brake Fluid or an equivalent DOT 3 fluid.

Do I need new rotors with new pads?

It is strongly recommended. Worn or warped rotors cause noise, pulsation and poor pad bedding. New rotors with new pads give the most consistent result.

Sources

1. 2014 Nissan Altima Owner's Manual (Nissan USA) - front and rear disc self-adjusting brakes, audible pad wear indicators, DOT 3 fluid, foot parking brake pedal, resting a foot on the pedal wears pads
2. 2010 Nissan Altima Owner's Manual (Nissan USA) - front and rear disc brakes, DOT 3 fluid, pedal or lever parking brake
3. Nissan Altima brake service campaign NTB12-011 (NHTSA) - fluid level drops as pads wear and can light the brake warning lamp
4. How Car Brakes Work (Wagner Brake) - weight shifts forward so the front brakes do most of the work
5. Rear Brake Pads on Vehicles with Stability Control (Bendix) - EBD and stability control make rear pads wear faster than expected
6. 2002 Nissan Altima rear pad fitment (Detroit Axle) - rear disc brake type on 2002 Base, SE and SL
7. 2006 Nissan Altima rear rotor and pad fitment (Detroit Axle) - rear disc brakes across 2006 trims including SE-R