How to Replace Brake Pads on a Ford Focus ST

By Core Brake Parts Tech Team — Circleville, OH warehouse

Yes, a home mechanic with a floor jack, jack stands, and a basic socket set can replace the brake pads on a Ford Focus ST. Plan on roughly an hour per axle the first time, and set aside a few extra minutes if your car carries the performance brake package, because fixed multi-piston front calipers load pads differently than the standard floating calipers. Either way, the job needs no specialty diagnostic tools, just patience, the correct pads, and a torque wrench.

Know Which Brake Package Your Focus ST Has

This is the single most important step before you order parts. The base Focus ST uses conventional floating calipers: a single-piston caliper that slides on two greased pins, with pads that come out after you unbolt the caliper body. Performance trims may instead use fixed multi-piston calipers, often Brembo-supplied, that bolt rigidly to the knuckle. On those, the pads slide out through the top of the caliper once you pull a retaining pin or bolt, and the caliper itself stays put.

The two designs take completely different pads, so look at your front calipers before buying anything. A fixed caliper is usually a large painted casting with a visible pad window on top and no slide-pin boots. A floating caliper is smaller, unpainted or black, with rubber boots on the two pins at the back. Once you know which one you have, the Core Brake Parts vehicle finder narrows the catalog to pads that actually fit your setup.

Tools and Parts You Need

• Floor jack and a pair of jack stands rated for the vehicle
• Lug wrench or breaker bar with the correct lug socket
• Metric socket set and ratchet, plus a set of combination wrenches
• C-clamp or caliper piston spreader (a wide spreader plate is easier on multi-piston calipers)
• Aerosol brake cleaner and clean shop rags
• High-temperature silicone caliper grease
• Torque wrench that covers both caliper-bolt and lug-nut ranges
• Wire hook or bungee to hang a floating caliper
• Punch or pliers for the retaining pin on fixed calipers
• New pads for your brake package from the brake pad collection
• Fresh clips, shims, and pins from a matching brake hardware kit

Step-by-Step: Replacing Focus ST Brake Pads

1. Prep the car. Park on a flat, hard surface, set the parking brake, and chock the wheels on the opposite axle. Crack the lug nuts loose a half turn while the tire is still on the ground.
2. Lift and support. Raise the car at the factory jacking point and set a jack stand under a solid structural point. Lower the car onto the stand. Never work under a vehicle held only by the jack.
3. Remove the wheel and set it flat under the sill as a backup safety measure.
4. Open the brake fluid reservoir cap. If the reservoir is near full, draw a little out with a clean syringe so it does not overflow when the pistons go back.
5. Floating caliper (base trim): Remove the two caliper slide bolts, lift the caliper off the bracket, and hang it from the spring with a hook so the brake hose carries no weight. Pull the old pads and the stainless abutment clips out of the bracket.
6. Fixed caliper (performance trim): Leave the caliper bolted in place. Drive out the pad retaining pin or remove the retaining bolt, lift off any anti-rattle spring, and slide both pads up and out through the top window. Note how the spring and pin were arranged before they come apart.
7. Inspect the rotor. Look for deep scoring, heat cracks, or a raised lip at the outer edge. Measure the thickness with a micrometer and compare it to the minimum stamped on the rotor hat. A rotor at or under minimum gets replaced, not reused.
8. Compress the pistons. On a floating caliper, place an old pad over the piston and squeeze it back with a C-clamp. On a fixed caliper, use a spreader plate to push all pistons back evenly and slowly; forcing one piston at a time can cock the others. Watch the reservoir level as you go.
9. Clean and lubricate. Spray the bracket or caliper body with brake cleaner. On floating calipers, pull the slide pins, wipe them, and re-coat with silicone grease before reinstalling. Apply a thin film of grease to the pad ears and the back of each pad where it contacts the piston or caliper fingers. Keep grease off the friction face.
10. Install new hardware. Snap the new abutment clips into the bracket, or fit the new anti-rattle spring and pin on a fixed caliper. Old, rusted clips are the main cause of noise and dragging after a pad job, so use the fresh set.
11. Fit the new pads. They should slide in with light hand pressure. If a pad binds, clean the bracket lands again rather than hammering it in.
12. Reassemble. Reinstall the floating caliper over the pads and tighten the slide bolts to the torque listed in the service manual, using thread locker only if the manual calls for it. On fixed calipers, seat the retaining pin and spring exactly as they came out.
13. Refit the wheel. Hand-thread the lug nuts, lower the car until the tire just touches, and torque the lugs in a star pattern to the manual's spec. Do a final check after the car is fully on the ground.
14. Pump the pedal. Before you start the engine, press the brake pedal slowly several times until it is firm. This seats the pistons against the new pads. Top off and cap the reservoir.
15. Bed in the pads according to the pad manufacturer's instructions, usually a series of moderate stops from speed followed by a cool-down drive without coming to a full stop.

Safety First

Use jack stands every time, and never let a caliper dangle by its hose. Wear gloves and eye protection with brake cleaner, and work in fresh air. Do not drive until the pedal is firm; the first press after a pad change can go to the floor if the pistons have not been pumped out. Treat the first few dozen miles gently while the pads and rotors mate.

When to Call a Shop

Hand this job to a professional if you find a leaking piston seal, a torn slide-pin boot with corroded pins that will not move, a rotor below minimum thickness that you are not prepared to replace, or a fixed caliper with pistons that refuse to retract evenly. Any of those signals a caliper rebuild or replacement rather than a simple pad swap. A spongy pedal after the job that pumping does not cure also means air or a fluid issue that needs bleeding equipment and know-how. Browse the full brake parts catalog if the inspection turns up more than pads.

Floating vs. Fixed Caliper Pad Change at a Glance

Frequently Asked Questions

Do I have to replace both front pads at the same time?

Yes. Always replace pads in axle sets, meaning both wheels on the front or both on the rear, so braking force stays balanced side to side.

Can I reuse the old clips and springs?

You can, but you should not. Rusted or fatigued clips let pads sit crooked and rattle. A fresh hardware kit is inexpensive insurance against noise and uneven wear.

What torque do the caliper bolts need?

Use the figure in your Focus ST service manual for your specific caliper type and model year. Torque specs and thread-locker requirements vary, so do not rely on a number from a forum.

Why do performance pads need special bed-in?

Higher-temperature friction materials need controlled heat cycles to transfer an even layer onto the rotor. Skipping this can cause judder and glazing, so follow the pad maker's bed-in procedure exactly.

Every pad set and hardware kit at Core Brake Parts is fitment-verified, so a base-trim Focus ST owner and a performance-package owner each get the correct part the first time. Orders over $75 ship free, in-stock parts ship fast, and a 30-day return window covers you if plans change.