Brake Fluid Flush

Complete brake fluid flush on a 2024 Cybertruck, replacing all DOT 3 fluid in the master cylinder reservoir and at all four caliper bleeders. This is a Tesla-recommended 2-year service interval regardless of mileage.

Warnings

Tools required

Parts

• Bleeder screw dust caps (replace if missing/damaged) × 4 — OEM specification

Fluids

• DOT 3 Brake Fluid (sealed, unopened container) — 1 qt

Preparation

1. Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with the key fob away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the 48V low-voltage battery per Tesla service procedure (Cybertruck uses 48V — NOT 12V like other Teslas). Locate the 48V battery and isolate per the Tesla Service Manual.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. Before disconnecting 48V power, enable Jack Mode / Service Mode via the touchscreen to lock out air suspension self-leveling.
7. Verify you have a sealed bottle of DOT 3 brake fluid and that the container has not been previously opened.
8. Have a helper available if not using a one-person pressure/vacuum bleeder.
9. Note: Tesla recommends brake fluid replacement every 2 years regardless of mileage — record the service date for the next interval.

Procedure

1. 1

   Lift vehicle and remove all four wheels
   With the vehicle in Service/Jack Mode, lift at the manufacturer-specified jack points using approved pucks. Support on jack stands rated for Cybertruck curb weight. Remove all four wheels to gain access to caliper bleeders.
   ⚠Cybertruck is significantly heavier than other Teslas. Confirm jack and stand ratings before lifting.
2. 2

   Inspect calipers and bleeder screws
   At each corner, locate the bleeder screw on the caliper. Remove the dust cap, clean the bleeder area with a lint-free towel, and verify the bleeder will break loose without rounding. If a bleeder is seized, stop and address before draining the reservoir.
3. 3

   Evacuate old fluid from master cylinder reservoir
   Open the master cylinder reservoir cap. Using a clean turkey baster or syringe dedicated to brake fluid, remove as much of the old (typically dark) fluid as possible without disturbing sediment at the bottom. Discard into a sealed waste container.
   ⚠Do not let debris fall into the reservoir. Cybertruck's iBooster/ABS unit is sensitive to contamination.
4. 4

   Refill reservoir with fresh DOT 3
   Fill the reservoir to the MAX line with fresh, sealed DOT 3 brake fluid. Keep the bottle nearby — you will top off frequently during the flush. Never let the level drop below MIN.
5. 5

   Determine bleed sequence
   Follow the manufacturer-specified bleed sequence for this vehicle. Verify the correct order in the Tesla Service Manual before proceeding — incorrect sequencing on vehicles with electronic brake boosters can leave air trapped in the modulator.
   ⚠VERIFY bleed sequence with the Tesla Service Manual. Do not assume traditional 'farthest-from-master-cylinder-first' applies to this electronically boosted system.
6. 6

   Flush first caliper
   Attach a clear hose to the first bleeder in the specified sequence; submerge the other end in clean DOT 3 in a catch bottle. Using a pressure bleeder, vacuum bleeder, or two-person pedal method, open the bleeder and flow fresh fluid through until the discharge runs clear and bubble-free (typically 250-400 mL per corner). Close the bleeder and torque.
   ⚠Top off the master cylinder reservoir after each corner — do not let it run dry.
   Torque spec

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

   Flush remaining three calipers in sequence
   Repeat the bleed procedure at each remaining corner in the manufacturer-specified order. After each corner, top off the reservoir and verify clear, bubble-free discharge before closing. Torque each bleeder to spec.
   Torque spec

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

   Final reservoir level check and cap
   With all four bleeders closed and torqued, set the master cylinder reservoir level to the MAX line with fresh DOT 3. Wipe any spillage with a damp towel. Reinstall the reservoir cap hand-tight to the specified torque.
   Torque spec

   Master Cylinder Cap4 Nm (3 lb-ft)
9. 9

   Reinstall dust caps and wheels
   Install dust caps on all four bleeder screws. Mount wheels and snug lug nuts by hand. Lower the vehicle until tires contact the ground, then torque lug nuts in a star pattern to specification.
   Torque spec

   Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Lower the vehicle fully to the ground.
2. Reconnect the 48V low-voltage battery per Tesla procedure.
3. Exit Service/Jack Mode via the touchscreen and allow air suspension to re-level.
4. Final torque verification on all four lug nuts in star pattern.
5. Dispose of old brake fluid at an approved hazardous waste facility — do not pour down drains.

Verification

• With the vehicle on and brakes pressurized, pump the brake pedal several times — pedal should feel firm and consistent, not spongy. A soft pedal indicates trapped air and requires re-bleeding.
• Check the touchscreen for any brake system, ABS, or stability control warnings. Cybertruck's iBooster will throw alerts if air is trapped or fluid level is low.
• Inspect each caliper bleeder and the master cylinder cap for leaks after a short test drive.
• Perform a low-speed brake test in a safe area (under 15 mph) before normal driving. Verify straight-line stopping with no pull.
• Record the service date — Tesla recommends brake fluid replacement every 2 years regardless of mileage. Set a reminder for the next interval.
• If pedal feel remains poor or warnings persist, the ABS/iBooster modulator may require a service-tool-initiated bleed cycle. Consult a Tesla-certified technician.

More procedures for this vehicle