2025-07-07

Master Cylinder and Reservoir Assembly (Remove and Replace)

Correction code 33201012 1.32 NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. To provide feedback on FRT values, email ServiceManualFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.

  • 2025-07-07: Added step to bleed the brakes through the inner bleed valves only.
  • 2023-12-07: Updated brake stiffness routine.
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Warning
This procedure is a DRAFT. Although it has been validated, Warnings and Cautions might be missing. Follow safety requirements and use extreme caution when working on or near High Voltage systems and components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.

Remove

  1. Open LH front door
  2. Lower LH front window
  3. Raise and support vehicle
    Informational PurposesAn informational icon, calling your attention
    Note
    Ensure vehicle is not charging before lifting it off the ground, Set air suspension to "Jack Mode" if equipped
  4. Open hood
  5. Remove rear apron
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    Note
    14x clips
  6. Remove access panel
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    Note
    3x clips, 1x connector
  7. Remove fasteners securing the frunk assembly
    Informational PurposesAn informational icon, calling your attention
    Note
    5x bolts, 10mm, 5 Nm, Newer vehicles may be equipped with 1x push clip securing frunk to reservoir neck
  8. Remove frunk assembly from vehicle
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    Note
    6x clips, Replace any clips if broken or missing
  9. Remove all four wheels. See Wheel Assembly (Remove and Install).
  10. Lower vehicle partially and set lift onto locks
    Informational PurposesAn informational icon, calling your attention
    Note
    Raise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered, Set vehicle to comfortable working height
  11. Power off vehicle from center display
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    Note
    Via Controls > Safety & Security > Vehicle Power > Power Off
  12. Disconnect 12V negative terminal and first responders loop
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    Note
    1x nut, 10mm, 6 Nm, 1x connector, Ensure vehicle is in park, climate control system is off, and vehicle is not charging before disconnecting 12V, Negative terminal should be disconnected before FRL, Allow 2 minutes for all electrical circuits to fully discharge
  13. Remove LH wiper arm nut cover
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    Note
    1x cover
  14. Remove the nut securing the LH wiper arm to wiper module
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    Note
    1x nut, 15mm, 25 Nm
  15. Disconnect washer hose from LH wiper arm to Y-tube fitting and release washer hose clip
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    Note
    1x clip, 1x hose
  16. Remove the LH wiper arm and hose assembly from vehicle
  17. Remove RH wiper arm nut cover
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    Note
    1x cover
  18. Remove the nut securing the RH wiper arm to wiper module
    Informational PurposesAn informational icon, calling your attention
    Note
    1x nut, 15mm, 25 Nm
  19. Disconnect washer hose from RH wiper arm to Y-tube fitting and release washer hose clip
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    Note
    1x clip, 1x hose
  20. Remove the RH wiper arm and hose assembly from vehicle
  21. Disconnect washer hose from washer pump to Y-tube fitting and release washer hose clip
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    Note
    1x clip, 1x hose
  22. Remove cowl screen retaining clips
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    Note
    2x push clips
  23. Release the cowl clips at the center bracket
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    Note
    2x retaining clips
  24. Remove cowl screen from vehicle
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    Note
    2x clips, Release the corners of the cowl by pulling away from the body then lift the cowl off of the windshield
  25. Disconnect brake fluid reservoir
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    Note
    1x connector, Slide locking tab away from connector to fully release
  26. Place absorbent material underneath brake booster and reservoir area
  27. Clean area around brake fluid reservoir and remove brake reservoir cap
  28. Remove fluid from brake fluid reservoir
  29. Install brake reservoir cap
  30. Disconnect forward brake line from master cylinder
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    Note
    1x nut, 12mm, 16 Nm
  31. Disconnect rear brake line from master cylinder
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    Note
    1x nut, 12mm, 16 Nm
  32. Remove nuts securing brake master cylinder to brake booster
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    Note
    2x nuts, 13mm, 20 Nm
  33. Remove brake master cylinder from vehicle
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    Note
    Make sure the o-ring come off with brake master

Install

  1. Install brake master cylinder to vehicle
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    Note
    Make sure i-booster rod is aligned with brake master cylinder during installation
  2. Install nuts securing brake master cylinder to brake booster
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    Note
    2x nuts, 13mm, 20 Nm
  3. Connect rear brake line into master cylinder
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    Note
    1x nut, 12mm, 16 Nm
  4. Connect forward brake line into master cylinder
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    Note
    1x nut, 12mm, 16 Nm
  5. Remove absorbent material from underneath brake booster assembly and reservoir area
  6. Connect brake fluid reservoir connector
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    Note
    1x connector, Secure locking tab by sliding towards connector once installed
  7. Install cowl screen assembly
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    Note
    2x clips, Press the corners of the cowl into the body
  8. Install the cowl clips at the center bracket
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    Note
    2x retaining clips
  9. Install cowl screen retaining clips
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    Note
    2x clips
  10. Connect washer hose from washer pump to Y-tube fitting and secure washer hose clip
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    Note
    1x clip, 1x hose
  11. Install the RH wiper arm and hose assembly onto vehicle
  12. Install the nut securing the RH wiper arm to wiper module
    Informational PurposesAn informational icon, calling your attention
    Note
    1x nut, 15mm, 25 Nm, Make sure the wiper tip is aligned between the two indicators at corner of windshield
  13. Install RH wiper arm nut cover
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    Note
    1x cover
  14. Connect washer hose from RH wiper arm to Y-tube fitting and secure washer hose clips
    Informational PurposesAn informational icon, calling your attention
    Note
    1x clip, 1x hose
  15. Install the LH wiper arm and hose assembly onto vehicle
  16. Install the nut securing the LH wiper arm to wiper module
    Informational PurposesAn informational icon, calling your attention
    Note
    1x nut, 15mm, 25 Nm, Make sure the wiper tip is aligned between the two indicators at windshield
  17. Install LH wiper arm nut cover
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    Note
    1x cover
  18. Connect washer hose from LH wiper arm to Y-tube fitting and secure washer hose clip
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    Note
    1x clip, 1x hose
  19. Fill brake bleeder reservoir to full level
  20. Clean area around brake fluid reservoir and remove brake reservoir cap
  21. Top off brake fluid reservoir
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    Note
    Top off brake fluid as needed
  22. Install pressure bleeder adapter onto reservoir
  23. Set brake bleed reservoir pressure to 30 psi
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    Note
    Connect power supply to bleeder and turn on the power, Set pressure to 30 psi, Attach brake bleed reservoir to brake bleed adapter
  24. Bleed the LH and RH front brake calipers and the RH and LH rear brake calipers through the brake calipers' inner bleed valves until clean fluid without air bubbles flows out of the caliper.
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    Note
    It is not necessary to bleed the brake calipers through the outer bleed valves.
    1. Flush the LH front caliper using the inner bleed valve until a noticeable reduction in air bubbles is observed.
    2. Flush the RH front caliper using the inner bleed valve until a noticeable reduction in air bubbles is observed.
    3. Flush the RH rear caliper using the inner bleed valve until a noticeable reduction in air bubbles is observed.
    4. Flush the LH rear caliper using the inner bleed valve until a noticeable reduction in air bubbles is observed.
    5. Bleed the LH front caliper using the inner bleed valve. See Brake Fluid Bleed/Flush for details.
    6. Bleed the RH front caliper using the inner bleed valve. See Brake Fluid Bleed/Flush for details.
    7. Bleed the RH rear caliper using the inner bleed valve. See Brake Fluid Bleed/Flush for details.
    8. Bleed the LH rear caliper using the inner bleed valve. See Brake Fluid Bleed/Flush for details.
    9. Make sure to perform the brake stiffness test. See Brake Fluid Bleed/Flush for details.
  25. Pump the brake pedal a few times to ensure the brake pedal feels normal
  26. Using Toolbox 3:
    1. Select the Actions tab and search for "Stiffness".
    2. Select the ODIN routine TEST_BRAKE_X_STIFFNESS-TEST-SERVICEvia Toolbox: (link)via Service Mode: Chassis ➜ Brakes ➜ Brake Stiffness Test, and then click the link of the routine.
    3. If brake pads or rotors have been replaced, select UNBURNISHED under "Action_Type". In all other cases, select BURNISHED.
    4. Click RUN, and allow the routine to complete.
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      Note
      Do not press the brake pedal during the test.
  27. Remove HSD cable from Ethernet port to disconnect Toolbox 3.0 from vehicle
  28. Raise vehicle partially and lower lift onto locks
    Informational PurposesAn informational icon, calling your attention
    Note
    Set vehicle to a comfortable working height, Make sure there's an audible click of the locks on both sides before lowering, otherwise vehicle may tilt to the side
  29. Install all wheels. See Wheel Assembly (Remove and Install).
  30. Install rear apron
    Informational PurposesAn informational icon, calling your attention
    Note
    14x clips, Hold rear wall of frunk to keep from flexing while engaging front clips
  31. Close hood
  32. Remove vehicle from lift
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    Note
    Lower rack arms fully and remove from under vehicle if necessary, Remove air suspension from "Jack Mode" if equipped
  33. Raise LH front window
  34. Close LH front door
  35. Perform a test drive using a series of ABS active stops and make sure proper brake pedal feel and performance is achieved.0
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    Note
    Add correction code 00040100 as a separate activity to the Service Visit.