How to Replace Brake Pads | PTP's Lift & Fix

Squealing brakes mean your pads are talking to you. They're worn down and it's time for new ones. A shop will charge $250 to $400 per axle for parts and labour. Do it yourself and you're looking at $40 to $80 in pads and an afternoon in the garage.

Brake work is serious, your ability to stop depends on it, but replacing pads on most cars is straightforward if you follow steps carefully. This guide covers front pads, which wear faster and are the most common DIY brake job.

Before you start: know when pads need replacing

Most brake pads have a wear indicator, a small metal tab that squeals against the rotor when the pad material gets thin. If you hear a constant squeal while driving (not just when braking), that's your cue.

You can also look through the wheel spokes with a flashlight. Pads should have at least 3mm of material left. If you see metal close to the rotor surface, don't wait.

While you're in there, check the rotors. Deep grooves, lip on the edge, or pulsation when braking means they may need resurfacing or replacement too. Pads alone won't fix a warped rotor.

Tools and parts you'll need

New brake pads (match front or rear, they're different). Brake cleaner spray. A C-clamp or brake caliper piston tool. Socket set and wrenches. Jack and jack stands or a lift. A bungee cord or wire hanger. Gloves and rags. Torque wrench if you have one.

Some cars need specific tools rear pads on many vehicles require winding the caliper piston back in with a special tool instead of pushing it. Look up your exact car before buying parts.

Step 1: Prep and loosen lug nuts

Park on flat ground. Loosen the lug nuts on the wheel you'll work on while the car is still on the ground about a quarter turn each. Don't remove them yet.

If you're doing both front brakes, you can do one side at a time so you always have a reference for how things go back together.

Step 2: Lift the car safely

Jack up the front corner at the proper jack point. Set a jack stand under the frame. Lower the car onto the stand and confirm it's solid before going underneath.

A lift makes this whole job easier, you can do both sides without repeatedly jacking each corner. At PTP's Lift & Fix, you'd raise the whole front end and walk between wheels.

Remove the wheel and set it aside. You should now see the brake rotor and caliper assembly behind where the wheel was.

Step 3: Remove the caliper

The caliper is the clamp around the rotor that holds the pads. There are two bolts on the back side holding it to the bracket, usually hex head or Torx. Remove those bolts and slide the caliper off the rotor.

Don't let the caliper hang by the brake hose. That's a rubber line that can crack or leak under the weight. Hook it to the coil spring or suspension with a bungee cord so it stays supported.

The old pads may fall out when you remove the caliper, or they may stay in the bracket. Pull them out and note how they were oriented.

Step 4: Compress the caliper piston

New pads are thicker than worn ones, so you need to push the caliper piston back in to make room. Open the brake fluid reservoir cap under the hood first compressing the piston pushes fluid back up the line, and you don't want to overflow the reservoir.

Place the old inner pad against the piston and use a C-clamp to slowly push the piston in. Go evenly and steadily. Some pistons need to be rotated while pushing rear calipers especially. Check your car's procedure.

Wipe any brake fluid spills immediately brake fluid eats paint. Put the reservoir cap back on loosely once the piston is fully retracted.

Step 5: Install new pads

Many pad sets come with new hardware clips, shims, and anti-squeal grease. Use it. Clean the bracket contact points with brake cleaner and a wire brush if there's rust or crud built up. Ontario salt loves to rust brake hardware.

Apply anti-squeal compound to the back of the pads where they contact the caliper piston and bracket. Slide the new pads into the bracket. They should fit snugly without forcing.

If the rotors look glazed or scored but aren't worn below minimum thickness, you can scuff them with sandpaper or have them turned at a parts store. At minimum, wipe them with brake cleaner.

Step 6: Reinstall the caliper

Slide the caliper over the new pads and rotor. Line up the bolt holes and insert the caliper bolts. Tighten them to the torque spec in your manual, usually around 25 to 35 Nm. If you don't have a torque wrench, snug them firmly without cranking.

Double-check that the pads are seated correctly and the caliper moves freely on its slides. Sticky caliper slides cause uneven pad wear pull them out, clean them, and re-grease if they feel rough.

Step 7: Put the wheel back on

Mount the wheel and hand-tighten the lug nuts. Lower the car to the ground. Torque the lug nuts in a star pattern to spec, usually 80 to 100 Nm on most passenger cars.

Repeat on the other side if you're doing both front brakes. Always replace pads in pairs on the same axle so braking stays balanced.

Step 8: Bed in the new pads

Before you hit the highway, pump the brake pedal a few times with the engine running. The pedal will feel soft at first, that's normal until the piston seats against the new pads.

Drive carefully for the first 50 to 100 km. Avoid hard stops initially. Most pad manufacturers recommend a few moderate stops from 50 km/h to heat-cycle the pads and transfer a layer of material to the rotors. This prevents squeal and improves stopping power.

If the pedal stays soft, the pedal pulsates, or you hear grinding instead of quiet stops, stop driving and recheck your work. Something isn't right.

When to stop and call a pro

If you find seized caliper bolts, a leaking brake line, a rusted-through brake line, or rotors worn below minimum thickness, don't push through. Brakes aren't where you guess.

ABS sensors, electronic parking brake calipers, and some luxury cars have extra steps that aren't covered here. When your car has those systems, find a model-specific guide or get professional help.

Done right, a pad swap is one of the most satisfying DIY jobs. You save real money, you know your brakes are actually good, and the next time you hear that squeal, you won't panic, you'll just order pads.