This procedure removes old brake fluid from the entire hydraulic brake system and replaces it with fresh DOT 3 fluid to maintain optimal braking performance and prevent internal corrosion.

Warnings

Tools required

Fluids

• DOT 3 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level ground and set parking brake firmly
2. Place wheel chocks behind rear wheels
3. Loosen all four wheel lug nuts one full turn while vehicle is on ground
4. Raise vehicle using floor jack at designated jacking points and support on jack stands at all four corners
5. Remove all four wheels completely
6. Verify brake fluid type: Toyota Corolla 2014-2019 requires DOT 3 brake fluid only - do not substitute DOT 4 or DOT 5.1
7. Locate brake fluid reservoir in engine bay on driver's side firewall near master cylinder
8. Clean area around reservoir cap to prevent contamination

Procedure

1. 1

   Remove old fluid from reservoir
   Use turkey baster or brake fluid syringe to remove as much old brake fluid as possible from the master cylinder reservoir. Dispose of old fluid in sealed container. Wipe inside of reservoir with clean lint-free cloth to remove sediment. Do not allow debris to fall into reservoir ports.
   ⚠Old brake fluid may be dark brown or black - this is normal for fluid due for replacement.
2. 2

   Fill reservoir with fresh fluid
   Fill master cylinder reservoir to MAX line with fresh DOT 3 brake fluid. Keep the bottle of fresh fluid nearby as you will need to refill frequently during bleeding process. Never let reservoir drop below MIN line.
   ⚠️Monitor reservoir level continuously during entire bleeding procedure. If reservoir empties, air enters ABS system requiring dealer-level scan tool to purge.
3. 3

   Prepare bleeding setup
   Attach clear vinyl tubing to bleeder screw on first wheel (rear right). Place other end of tubing into catch bottle with enough fresh brake fluid to cover end of tube. This prevents air from being sucked back into caliper. Identify bleeder screw location: rear calipers have bleeder on top/rear; front calipers have bleeder on top/inboard side.
   ℹ️Bleeding sequence for this vehicle: Right Rear → Left Rear → Right Front → Left Front (farthest from master cylinder to closest).
4. 4

   Bleed right rear caliper
   With tubing attached to right rear bleeder screw, have assistant press brake pedal slowly 3-4 times and hold firm pressure. While assistant maintains pressure, open bleeder screw 1/2 to 3/4 turn counterclockwise. Old fluid and air will flow through tube. Watch for pedal to drop to floor. Close bleeder screw before assistant releases pedal. Repeat process until fluid runs clear with no air bubbles. Check and refill reservoir to MAX line after every 3-4 bleeds.
   ⚠️Bleeder screw must be closed BEFORE assistant releases brake pedal or air will be drawn into system.
   ⚠Do not overtighten bleeder screw to specified 10 Nm - these are brass and easily stripped.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
5. 5

   Bleed left rear caliper
   Move tubing and catch bottle to left rear bleeder screw. Repeat same bleeding process: assistant pumps pedal 3-4 times and holds, you open bleeder while pressure is held, close bleeder before pedal is released. Continue until fluid is clear with no bubbles. Refill reservoir to MAX line.
   ⚠️Check reservoir level before starting each wheel - running dry requires ABS system bleeding at dealer.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
6. 6

   Bleed right front caliper
   Move tubing and catch bottle to right front bleeder screw. Repeat bleeding process: pump pedal 3-4 times, hold pressure, open bleeder, watch fluid flow, close bleeder before releasing pedal. Continue until fluid runs clear. Front calipers may require more repetitions due to larger fluid volume. Refill reservoir to MAX line.
   Torque spec

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

   Bleed left front caliper
   Move tubing and catch bottle to left front bleeder screw (closest wheel to master cylinder). Repeat bleeding process until fluid is completely clear with no air bubbles. This is the final wheel in sequence. Refill reservoir to MAX line when complete.
   ℹ️Fluid should be noticeably cleaner/lighter in color than what was removed from reservoir.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
8. 8

   Verify pedal feel
   With engine off, pump brake pedal several times. Pedal should feel firm and consistent with no spongy feel. If pedal feels soft or sinks slowly, air remains in system - repeat bleeding sequence starting from right rear. Check all four bleeder screws are tight to 10 Nm torque specification.
   ⚠️Spongy or soft pedal indicates air in system - vehicle is unsafe to drive until pedal is firm.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
9. 9

   Top off reservoir and reinstall cap
   Fill reservoir to MAX line with fresh DOT 3 brake fluid. Ensure reservoir cap gasket is clean and in good condition. Install cap securely. Wipe away any spilled fluid from reservoir exterior and surrounding painted surfaces with water.
   ⚠Brake fluid will permanently damage paint if not cleaned immediately.
10. 10

    Reinstall wheels
    Clean wheel mounting surfaces on hub and inside wheel. Install all four wheels. Hand-thread all lug nuts to prevent cross-threading. Lower vehicle until wheels just touch ground but suspension not fully loaded. Torque lug nuts in star pattern to specification. Fully lower vehicle and remove jack stands.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Verify all four bleeder screws are tightened to 10 Nm specification
2. Confirm brake fluid reservoir is at MAX line with cap installed securely
3. Verify no fluid leaks at any bleeder screw or brake line connection
4. Clean any brake fluid spills from wheels, calipers, and painted surfaces with water

Verification

• With engine off, pump brake pedal 5-6 times - pedal must feel firm and high with no sponginess
• Check for fluid leaks at all four bleeder screws and around reservoir cap
• Start engine and verify brake pedal height does not change significantly with engine running
• Perform low-speed brake test in safe area (parking lot): brakes should engage smoothly and firmly with no pulling to either side
• Check reservoir fluid level after test drive - should remain at MAX line with no significant drop
• Recheck all four wheel lug nuts for proper torque after first 50-100 miles of driving
• If ABS warning light illuminates, or pedal feels abnormal, do not drive vehicle - have it towed to qualified technician for ABS system bleeding

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