2003-2008 Honda Pilot Front vs Rear Brakes: What Wears First and What to Replace

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 2003-2008 Honda Pilot the front brakes almost always wear out first, usually by a wide margin, because the front axle does most of the stopping on a heavy three-row SUV. Do not assume the rears are fine, though: the rear pads start thinner, the rear rotors are much thinner, and the parking brake lives inside the rear rotor hat. Measure both ends every time the wheels come off.

How the First-Generation Pilot Brake System Is Laid Out

The first-generation Pilot shares its platform with the Accord, Odyssey and Acura MDX, and it uses four-wheel disc brakes with ABS and Vehicle Stability Assist (VSA). Each corner has a single floating caliper on a bolted bracket, and each end uses its own pad shape and rotor, so front and rear parts never interchange.

The rear rotors are not just smaller versions of the fronts. They are a hat-style rotor with a small drum machined inside the hat, and a pair of parking brake shoes rides in that drum. That detail matters when you replace rear rotors, because the parking brake shoes and their adjuster come into play.

The published specifications show how different the two ends are:

Look at the rotor rows. The front rotor is a thick vented disc with less than a tenth of an inch of usable material before it hits the limit. The rear rotor has a similar margin, but on a far thinner disc that sheds heat less well, so it does not take much wear or a single resurfacing cut to use it up.

What Wears First, and Why

When any vehicle brakes, weight shifts forward and the front tires do most of the work. On a tall, heavy SUV like the Pilot that effect is strong, so the front pads and rotors absorb most of the heat and friction. That is why the front pads go first on nearly every Pilot.

The rears are not a lifetime part, though. The rear pads start out thinner than the fronts, and VSA and ABS use the rear brakes to control the vehicle, so a Pilot driven in snow, towing or in stop-and-go traffic can wear its rears faster than you might expect. The honest answer is that front pads usually go first, but the only way to know where yours are is to measure.

Uneven wear between the two ends is also a clue. If the rears wear faster than the fronts, suspect a sticking rear caliper, dragging parking brake shoes, or a caliper slide pin that has seized in its bore.

Symptoms and How to Diagnose Each End

Front brake symptoms

• Steering wheel shake when braking. This points at the front rotors. Trade coverage of this generation notes that these vehicles tend to build high brake temperatures, which leads to runout in the rotor and hub. Honda allows no more than 0.004 inch of runout.
• Squeal that goes away with light pedal pressure. The inner front pad carries a wear indicator tab at the bottom of the pad. When it contacts the rotor it squeals to tell you the pad is near the end.
• Grinding. The pad is worn to the backing plate. The rotor is now being damaged and will almost certainly need replacing.

Rear brake symptoms

• Pulsation felt in the seat or pedal rather than the steering wheel. Often a warped or worn rear rotor.
• Parking brake that needs a lot of travel. The pedal should set in four to six clicks. More than that means the parking brake shoes need adjustment or the drum inside the rotor hat is worn.
• One rear wheel hot after a drive. A dragging caliper or parking brake shoe.

The brake fluid clue

The first-generation Pilot does not have electronic pad wear sensors. As the pads wear, the caliper pistons move out and the fluid level in the reservoir drops. Honda's owner's manual says that if the fluid level is at or below the MIN mark, the brake system should be inspected for leaks or worn brake pads. A low reservoir on a Pilot with no visible leak often means pads are thin somewhere.

What to Replace, and What to Replace With It

Front brake job

Replace front brake pads as an axle set. Measure the rotors: if they are under 1.02 inches, or have runout beyond 0.004 inch that you cannot correct, replace them with new brake rotors. Given how much heat these trucks put into the front rotors, many owners fit new rotors with every second pad change. Install a new Pilot front brake hardware kit as well: the abutment clips lose their tension, and worn clips cause noise and uneven pad wear. Clean and lubricate the caliper slide pins.

Rear brake job

Rear pads are a different part from the fronts. A low-dust ceramic brake pad works well at both ends of a daily-driven Pilot. Because the rear rotor has so little thickness to work with, resurfacing is rarely worth it. Anything near 0.35 inch should be replaced. When the rotor comes off, inspect the parking brake shoes and the drum surface inside the hat. If the shoes are glazed, oil-soaked or thin, replace them from our brake shoes range while everything is apart.

Replace both ends at once?

Not automatically. Replace what measures worn. If the fronts are done and the rears are at half thickness, do the fronts now and plan the rears. If the rears are close to the limit too, doing all four corners at once saves a second weekend. Complete front and rear brake parts make sense on a high-mileage Pilot that has never had its rear rotors replaced.

How Hard the Job Is on Each End

Front

The front job is straightforward for a home mechanic. The caliper comes off with two 12mm bolts, the pads slide out of the bracket, and the bracket must come off to remove the rotor. Torque the front caliper bracket bolts to 80 ft-lb, the caliper guide pin bolts to 27 ft-lb, and the lug nuts to 80 ft-lb.

Rear

The rear pads are just as easy: two 12mm caliper bolts, then the pads come out. The rear caliper piston on this generation presses straight back with a C-clamp or F-clamp. It does not need to be wound in with a rotating tool. Open the reservoir cap and watch the fluid level while you push the pistons back so it does not overflow.

Rear rotor replacement is where the job gets more involved, because the parking brake shoes sit inside the hat. If the shoes have worn a lip into the drum surface, the rotor may hang up on them. Back off the parking brake adjuster through the access plug before pulling hard. The rear caliper bracket bolts are torqued to 80 ft-lb on reassembly.

After a rear rotor or shoe job, adjust the parking brake. The published procedure is to remove the access plug, turn the adjuster with a screwdriver until the shoes lock against the drum, then back it off 10 clicks and refit the plug. Then check that the pedal sets in four to six clicks.

Rotor runout and resurfacing

Because these trucks are known for runout at the rotor and hub, trade guidance recommends on-car resurfacing where possible. If you install new rotors, check runout with a dial indicator after mounting them and check the hub for play at the same time. A loose bearing will make even a perfect rotor pulse.

A Note on VSA, Recalls and Fluid

Under NHTSA recall 13V-092, Honda recalled certain 2005 model year Pilots because the VSA control unit could have been damaged during manufacturing. The result could be the system applying brake force when the driver had not pressed the pedal. Some of those vehicles also had a VSA electrical connector bolt that was not tightened to specification. If you own a 2005 Pilot and notice unexplained brake drag or sudden braking, check the recall status with a Honda dealer or on nhtsa.gov with your VIN before blaming the pads.

For fluid, Honda specifies Heavy Duty Brake Fluid DOT 3. If that is not available, the manual allows DOT 3 or DOT 4 from a sealed container as a temporary replacement. Change it on the schedule in your maintenance minder or owner's manual.

Frequently Asked Questions

Do the front and rear brake pads on a 2003-2008 Pilot wear at the same rate?

No. The front pads do most of the stopping and usually wear out first. Driving style, towing and caliper condition change the ratio, so measure both ends.

How thin can the pads get before I replace them?

The service limit is 0.06 inch of friction material, front and rear. Most owners replace them well before that, because pads at that point are also close to damaging the rotor.

Can I resurface the rear rotors?

Only if they stay above the 0.35 inch minimum after the cut, and the rear rotor starts at just 0.43-0.44 inch. In practice, new rear rotors are usually the better choice.

Do I need a special tool to retract the rear caliper piston?

No. On the first-generation Pilot the rear piston presses straight back with a C-clamp or F-clamp. It does not screw in like rear calipers with an integrated parking brake, because this Pilot's parking brake uses separate shoes inside the rotor hat.

Why does my Pilot shake when I brake at highway speed?

Usually front rotor runout or uneven thickness from heat. Check runout against the 0.004 inch limit and inspect the hub and wheel bearing. Replace the rotors if they are near the 1.02 inch minimum.

Are the front and rear pads the same part?

No. The front and rear use different pad shapes and different rotors. Always buy the correct part for each axle and confirm fitment for your exact year and trim.

Sources

1. Brake and Front End - Honda Pilot 2003-2008 Brake Job - pad and rotor thickness and service limits, runout limit, drum-in-hat parking brake and adjustment, torque specifications, platform details
2. NHTSA Recall 13V-092 owner notification - 2005 Pilot VSA control unit and connector bolt recall
3. Honda 2005 Pilot Owner's Manual - Brake Fluid - DOT 3 fluid specification and low fluid level as a sign of worn pads
4. 2003-2008 Honda Pilot Rear Disc Brake Pads Replacement Guide - 12mm caliper bolts, rear piston pushed back with a clamp, abutment clips
5. 2003-2008 Honda Pilot Front Brake Pads Replacement Guide - front caliper bolts and wear indicator on the inner pad