🔧 GS - Front Brake Pad Replacement

You’ll remove the front wheels, take the brake caliper off, swap the old pads for new ones, and then reassemble with the correct torque. This restores safe stopping power and prevents rotor damage when pads get thin.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• 🛑 Work on level ground and support the GS with jack stands before going under/near the wheels.
• 🧤 Brake dust is unhealthy—wear a mask and use brake cleaner, not compressed air.
• 🔥 Brakes can be extremely hot after driving—let everything cool fully.
• ⚠️ Do not press the brake pedal while a caliper is off the rotor.
• 🧪 Watch the brake fluid reservoir while pushing pistons back; fluid can overflow and damage paint.
• 🔌 Battery disconnect is not required for front pads on the GS.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 21mm socket
• 1/2" drive breaker bar
• 1/2" drive ratchet
• Torque wrench (10-200 ft-lbs range)
• 14mm socket
• 17mm socket
• 19mm socket
• Flat-blade screwdriver
• Needle-nose pliers
• C-clamp (6")
• Brake caliper piston spreader (specialty)
• Brake parts cleaning brush
• Wire brush
• Bungee cord
• Brake cleaner spray
• Nitrile gloves
• Safety glasses
• Dust mask

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front brake pad hardware/shim kit - Qty: 1
• Brake grease (silicone or ceramic) - Qty: 1
• Brake cleaner - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 quart

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📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and chock the rear wheels.
• 🔓 Crack the front lug nuts loose with a 21mm socket and breaker bar before lifting.
• 🧼 Open the hood and locate the brake fluid reservoir; place a rag around it in case of overflow.
• 🧠 Note: Your GS may have either a sliding caliper (caliper moves on guide pins) or a fixed multi-piston caliper (caliper does not slide and uses pad pins). Steps below include both paths.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and support the front end

• Use a floor jack (rated 3-ton minimum) to lift the front at the factory jacking point.
• Set the vehicle onto jack stands (rated 3-ton minimum) and gently shake the car to confirm it’s stable.
• Remove both front wheels using a 21mm socket and ratchet.

Step 2: Inspect pads and rotors

• Look at the rotor surface and the remaining pad thickness.
• If the rotor is heavily grooved, cracked, or below minimum thickness, plan to replace/measure it before installing new pads. New pads on bad rotors can squeal.

Step 3: Remove the caliper (Sliding-caliper path)

• Locate the two caliper guide/slide pin bolts on the back of the caliper.
• Remove the guide/slide pin bolts using a 14mm socket and ratchet.
• Lift the caliper off the rotor and hang it from the suspension with a bungee cord (never let it hang by the brake hose).

Step 4: Remove the pads (Sliding-caliper path)

• Pull the old pads out of the caliper bracket by hand.
• Remove the pad hardware/clips from the bracket using a flat-blade screwdriver.

Step 5: Remove the pads (Fixed multi-piston caliper path)

• On a fixed caliper, remove the pad retaining pins and spring clip using needle-nose pliers and a flat-blade screwdriver.
• Slide the pads out. If they’re stuck, gently work them free with a flat-blade screwdriver.
• Take a quick photo first for reassembly.

Step 6: Retract the pistons

• Check the brake fluid reservoir level under the hood before compressing pistons.
• Sliding-caliper: Place an old pad against the piston and compress it slowly using a C-clamp (6") until fully seated.
• Fixed multi-piston: Use a brake caliper piston spreader (specialty) to push the pistons back evenly and slowly (work side-to-side so you don’t cock a piston).
• If the reservoir starts to overflow, remove a small amount of fluid safely. Do not spill on paint.

Step 7: Clean and prep the bracket/caliper

• Clean the pad contact areas with brake cleaner spray and a brake parts cleaning brush.
• Lightly clean rust from pad “rails” with a wire brush so pads can slide freely.
• Install the new hardware/clips (if supplied) by pressing them into place by hand (use a flat-blade screwdriver only if needed).

Step 8: Install the new pads

• Apply a very thin layer of brake grease to pad ears/contact points where they touch the clips (do not get grease on pad friction material or rotor).
• Sliding-caliper: Slide the new inner and outer pads into the bracket.
• Fixed multi-piston: Slide the new pads into the caliper, then reinstall the pad pins and spring clip using needle-nose pliers.

Step 9: Reinstall the caliper and torque fasteners

• Sliding-caliper: Reinstall the caliper over the pads and start the guide/slide pin bolts by hand.
• Tighten the guide/slide pin bolts using a 14mm socket and torque wrench: Torque to 34 Nm (25 ft-lbs).
• If you removed the caliper bracket: Tighten bracket bolts using a 17mm socket or 19mm socket and torque wrench: Torque to 107 Nm (79 ft-lbs).
• Fixed multi-piston caliper mounting (if removed): Tighten the caliper mounting bolts using a 17mm socket or 19mm socket and torque wrench: Torque to 123 Nm (91 ft-lbs).
• If unsure, don’t remove the caliper body.

Step 10: Reinstall wheels

• Put the wheels back on and hand-thread lug nuts.
• Lower the GS to the ground with the floor jack (rated 3-ton minimum).
• Torque lug nuts in a star pattern using a torque wrench (10-200 ft-lbs range): Torque to 103 Nm (76 ft-lbs).

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✅ After Repair

• 🦶 Pump the brake pedal 10–15 times until it feels firm (this seats the pistons against the new pads).
• 🧪 Check brake fluid level and top off with DOT 3 if needed (do not overfill).
• 🔍 Check for leaks, unusual noises, or a soft pedal before driving.
• 🚗 Bed-in (break-in) the pads: make 6–10 moderate stops from 35–45 mph to 5 mph, letting brakes cool slightly between stops. Avoid hard stops while bedding.

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💰 DIY vs Shop Cost

Shop Cost: $300-$650 (parts + labor)

DIY Cost: $80-$220 (parts only)

You Save: $220-$430 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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