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Autopapyrus · Subaru Legacy III (BE/BH)
https://autopapyrus.com/guides/subaru/legacy/diagnosing-and-fixing-brake-squeal/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Subaru Legacy III (BE/BH): Diagnosing and Fixing Brake Squeal

Brake squeal on the Subaru Legacy BE/BH is most often caused by worn pads (the wear indicator is touching the rotor), dirty caliper guide pins, missing anti-squeal shims, or glazed pad surfaces. There is a factory technical service bulletin, TSB 063001R, covering brake squeal on the 2001 model year.

Difficulty: Medium Time: 1-2 hours Steps: 13 Tools: jack, lug wrench, 14 mm and 17 mm sockets, wire brush, brake lubricant (silicone, high-temperature)

Part

  • 🔩 front brake pads 26296AG051 (aftermarket equivalents Advics SN877, Brembo P78006), anti-squeal shims, silicone grease for caliper guide pins
There's a full repair manual for this car Every system, wiring diagrams and torque specs — not just this job. Haynes and 11 more. See manuals →

Step by step

13 steps
  1. Jack up the front of the vehicle and remove the wheel. Inspect the brake rotor for uneven wear, scoring, and deep grooves.
  2. Check the pad thickness through the inspection window in the caliper. The minimum friction material thickness is 2 mm. If the wear indicator (a metal tab on the right front pad) is touching the rotor, the pads must be replaced.
  3. Remove the two bolts that secure the caliper bracket to the steering knuckle (17 mm; tightening torque on reassembly 80 N·m (59 lb-ft)). Lift the caliper up and hang it from the spring with a piece of wire so the brake hose isn't strained.
  4. Remove the pads from the bracket. Inspect the anti-squeal shims (thin metal plates between the pad and the caliper piston). If they are missing, deformed, or worn, replace them with new ones.
  5. Unscrew the caliper guide pins (14 mm; tightening torque on reassembly 37 N·m (27 lb-ft)). Clean the pins with a wire brush until bright, then wipe them with a rag. Check the rubber boots and replace them if they are torn.
  6. Apply a thin layer of high-temperature silicone grease (not lithium grease) to the guide pins. Apply it only to the smooth part of the pin, and keep it off the threads and out of the boot.
  7. Clean the pad seats in the bracket. Apply a thin layer of brake lubricant to the metal abutments of the bracket where the pads slide during braking.
  8. If the old pads have a shiny, glazed surface, sand them with coarse P80-P120 sandpaper to remove the glaze. If the thickness is less than 3 mm, replace them with new pads.
  9. Install the new or resurfaced pads with the anti-squeal shims. The shims must sit tightly against the backing plates of the pads. Apply a thin layer of lubricant to the back of the shims (not to the friction surface of the pads).
  10. Push the caliper piston back into its bore (use a C-clamp or large pliers with a wooden spacer). Before doing this, open the master cylinder reservoir cap to avoid creating excess pressure.
  11. Lower the caliper onto the pads and tighten the bracket bolts to 80 N·m (59 lb-ft). Install the wheel and tighten the lug nuts/bolts to 88 N·m (65 lb-ft).
  12. Repeat the procedure on the other front wheel. Before driving, pump the brake pedal firmly several times so the pistons seat in their working position.
  13. Bed in the new pads: make 5-10 gentle stops from 40-50 km/h without coming to a complete stop, then let the brakes cool for 10-15 minutes. Avoid hard braking for the first 200-300 km.

Common mistakes and warnings

  • The wear indicator is fitted only to the right front and right rear pads. If it activates (metallic grinding), replace the pads on both axles. Do not use general-purpose lithium grease on the caliper guide pins: it damages the rubber boots and burns off with heat. Check the brake fluid level after pushing the pistons back in. It must be between the MIN and MAX marks.
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