Brake Caliper Rebuild - Rear

This procedure covers the complete disassembly, cleaning, inspection, and rebuild of the rear brake calipers on a 2014-2019 Toyota Corolla with 1.8L engine, including seal replacement and bleeding.

Warnings

Tools required

Parts

• Rear brake caliper rebuild kit (seals, dust boots, O-rings) × 2 — Use OEM specification for 2014-2019 Corolla rear
• Brake fluid × 1 — DOT 3
• Caliper slide pin boots (if damaged) × 4 — Inspect before ordering

Fluids

• DOT 3 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Loosen rear wheel lug nuts 1/4 turn while vehicle is on ground
3. Raise rear of vehicle with floor jack and support securely on jack stands at manufacturer-designated lift points
4. Remove rear wheels completely
5. Check brake fluid reservoir level and mark current level - top off if below MAX line
6. Place drain pan or rags under work area to catch brake fluid
7. Verify you have complete rebuild kits for both rear calipers before beginning disassembly

Procedure

1. 1

   Remove caliper from bracket
   Remove the lower caliper slide pin bolt using a 17mm wrench while holding the slide pin with a 14mm wrench. Pivot the caliper upward and support with wire or bungee cord. Do NOT let caliper hang by brake hose. Remove brake pads and anti-rattle clips, noting their orientation for reassembly.
2. 2

   Disconnect brake hose and remove caliper
   Place a drain pan under the caliper. Using a 12mm wrench, disconnect the brake hose banjo bolt from the rear of the caliper. Be prepared for brake fluid to drain. Immediately plug the brake hose with a rubber cap or clean bolt to prevent fluid loss and contamination. Remove caliper completely from vehicle and take to clean workbench.
   ⚠Brake fluid will drain when hose is disconnected. Do not allow fluid to contact paint or spill on floor.
3. 3

   Remove caliper piston dust boot
   Clean the exterior of caliper thoroughly with brake cleaner. Using a small flat-head screwdriver or pick, carefully pry out the dust boot retaining ring from the caliper bore groove. Remove the dust boot completely and inspect the bore for corrosion or scoring.
4. 4

   Extract caliper piston
   Place caliper in a padded vice or wrap in towels. Using compressed air applied carefully to the brake fluid inlet port, gently pressurize the caliper to push the piston out. Use LOW pressure and keep fingers clear of piston path. Alternatively, use a caliper piston spreader tool. Once piston starts moving, remove it by hand. Inspect piston for scoring, pitting, or chrome plating damage.
   ⚠️Piston can eject with significant force. Keep fingers and face away from piston path. Use only low air pressure (20-30 PSI maximum).
   ⚠If piston is severely corroded or pitted, the entire caliper must be replaced - do not attempt to rebuild.
5. 5

   Remove piston seal from bore
   Using a wooden or plastic tool (never metal), carefully remove the square-cut piston seal from the groove inside the caliper bore. Inspect the bore groove carefully for corrosion, scoring, or damage. Any significant damage requires caliper replacement.
6. 6

   Clean all caliper components
   Thoroughly clean the caliper bore, piston, and all internal passages with brake cleaner and lint-free rags. Clean the piston carefully - do not use abrasive materials that could damage the chrome plating. Inspect all surfaces. The bore should be smooth with no pitting or corrosion. Dry all parts completely with compressed air or allow to air dry.
   ℹ️Use only brake cleaner or fresh brake fluid for cleaning. Never use petroleum-based solvents which will contaminate seals.
7. 7

   Install new piston seal
   From your rebuild kit, identify the new square-cut piston seal. Lubricate the seal lightly with fresh DOT 3 brake fluid. Carefully install the seal into the groove in the caliper bore, working it gently around the entire circumference. Ensure the seal is seated properly in the groove with no twists or kinks.
8. 8

   Install piston with new dust boot
   Lubricate the caliper piston with fresh brake fluid. Install the new dust boot onto the piston according to rebuild kit instructions (typically the boot groove on piston is installed first). Carefully insert the piston into the caliper bore, ensuring the seal does not roll or twist out of its groove. Push piston in evenly until it bottoms in the bore. Install the dust boot outer lip into the caliper bore groove and secure with retaining ring if equipped.
   ⚠Do not force piston if resistance is felt - this indicates seal may be twisted or misaligned. Remove piston and inspect seal position.
9. 9

   Service caliper slide pins
   Remove both slide pins from the caliper bracket (if not already removed). Clean slide pins and bores thoroughly with brake cleaner. Inspect slide pin boots for tears or damage - replace if necessary. Apply thin coat of silicone brake grease to slide pins (not rubber grease or petroleum-based grease). Reinstall slide pins with new boots if needed.
   ℹ️Use only silicone-based brake grease on slide pins. Other lubricants will damage rubber boots and cause caliper seizure.
10. 10

    Reinstall caliper and connect brake hose
    Position rebuilt caliper onto the bracket. Install NEW copper crush washers on the brake hose banjo bolt (included in rebuild kit). Connect brake hose to caliper and tighten banjo bolt to 26 Nm (19 lb-ft). Ensure brake hose is not twisted. Install brake pads and anti-rattle clips in correct orientation.
    Torque spec

    Mounting Bolts26 Nm (19 lb-ft)
11. 11

    Secure caliper to bracket
    Pivot caliper down over brake pads. Apply small amount of silicone brake grease to slide pin bolt threads. Install lower caliper slide pin bolt and torque to 35 Nm (26 lb-ft) while holding slide pin stationary with 14mm wrench. Verify caliper moves freely on slide pins.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
12. 12

    Bleed rear brake caliper
    Attach clear bleeding tube to bleeder screw and place other end in container with small amount of fresh brake fluid. Have assistant slowly depress brake pedal while you open bleeder screw 1/4 turn with 10mm wrench. Close bleeder before pedal reaches floor. Repeat until fluid flows clear with no air bubbles. Tighten bleeder screw to 10 Nm (7 lb-ft). Check reservoir level frequently and top off as needed - never let it run dry.
    ⚠️Never allow brake pedal to go fully to floor during bleeding or master cylinder seals may be damaged. Never let reservoir run empty or air will enter ABS system.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
13. 13

    Repeat for opposite side
    Perform steps 1-12 on the opposite rear caliper. Work methodically and carefully. After both calipers are rebuilt and bled, check brake fluid reservoir and top off to MAX line with fresh DOT 3 brake fluid.
14. 14

    Reinstall wheels and test
    Reinstall rear wheels and hand-tighten lug nuts in star pattern. Lower vehicle to ground. Torque lug nuts to 140 Nm (103 lb-ft) in star pattern. Before driving, pump brake pedal several times until firm pedal is achieved. Pedal should be firm and hold steady pressure.
    ⚠️Do NOT drive vehicle until brake pedal is firm and holds steady pressure. Soft or spongy pedal indicates air in system - rebleed before operating vehicle.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Torque all fasteners to specified values using calibrated torque wrench
2. Verify brake hose banjo bolt has new copper crush washers installed
3. Confirm slide pins move freely and are properly lubricated with silicone brake grease
4. Check that dust boots are properly seated with no tears or damage
5. Ensure brake pads and anti-rattle hardware are installed in correct orientation

Verification

• With vehicle still on jack stands, verify brake pedal is firm and does not sink when held under pressure for 30 seconds
• Check all brake line connections and bleeder screws for leaks - tighten if seepage is observed
• Verify brake fluid reservoir is at MAX level with DOT 3 brake fluid
• Spin rear wheels by hand - they should rotate freely with only slight pad drag
• Perform low-speed test drive in safe area - brakes should engage smoothly without pulling to one side
• Perform several moderate stops from 30 mph to bed in new seals - brakes should feel firm and responsive
• After test drive, recheck brake fluid level and inspect all connections for leaks
• If pedal feel is not firm or vehicle pulls during braking, do not drive - recheck bleeding procedure and caliper installation

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