Brake Caliper Rebuild - Front

Rebuild the front brake calipers on a 2024 Model X Plaid. This involves removing the calipers, disassembling the piston(s), replacing seals/dust boots, cleaning, reassembling with fresh DOT 3 brake fluid, and bleeding the system. The Plaid uses high-performance front calipers with significant clamping force — proper rebuild and bleed quality is critical.

Warnings

Tools required

Parts

• Front caliper rebuild kit (piston seals, dust boots, bleeder cap) × 2 — OEM Tesla Model X Plaid front caliper rebuild kit — match by VIN
• Caliper slide pin boots (if applicable to caliper design) × 2 — OEM specification
• Brake pad anti-rattle clips/hardware × 1 — OEM specification
• Copper crush washers for banjo fitting (if banjo-style hose) × 4 — OEM specification
• Brake pads (recommended replacement during rebuild) × 1 — OEM Model X Plaid front pads

Fluids

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

Preparation

1. Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with 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. Before disconnecting 12V: enable 'Jack Mode' from the touchscreen (Controls > Service > Jack Mode) to disable air suspension self-leveling.
4. Disconnect the 12V low-voltage battery in the frunk per Tesla procedure (remove frunk liner/access panel, disconnect negative terminal first).
5. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
6. 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.
7. Loosen front wheel lug nuts while tires are on the ground.
8. Lift the front of the vehicle using only Tesla-approved lift points and jack pucks. Support with rated jack stands.
9. Remove front wheels and set aside (note hub-centric orientation).
10. Have a brake fluid catch pan and rags ready before opening any hydraulic fitting.
11. Confirm both calipers will be serviced together to keep brake bias even.

Procedure

1. 1

   Inspect and document caliper condition
   Before disassembly, inspect each front caliper for fluid leaks, torn dust boots, scored pistons, and pad wear. Photograph orientation of brake hose, hardware, and pad clips for reassembly reference.
2. 2

   Disconnect brake hose from caliper
   Place catch pan beneath the caliper. Loosen the brake hose fitting (banjo bolt or threaded fitting depending on configuration) and allow fluid to drain. Cap the hose end immediately to prevent excessive fluid loss and contamination. Discard old crush washers if banjo-style.
   ⚠Do not let brake fluid drip onto the brake disc, suspension bushings, or painted surfaces.
3. 3

   Remove caliper from bracket/knuckle
   Remove the caliper mounting bolts (and/or slide pin bolts depending on caliper design) and lift the caliper off. If the caliper bracket is also being removed for full access, remove the caliper bracket bolts from the steering knuckle. Support the caliper — do not let it hang by the (already disconnected) brake line stub.
   Torque spec

   Caliper Bolts88 Nm (65 lb-ft)

   Bracket Bolts102 Nm (75 lb-ft)
4. 4

   Remove brake pads and hardware
   Remove brake pads, anti-rattle clips, and any pad retaining hardware. Inspect pads for uneven wear (a sign of a sticking piston). Set aside or replace.
5. 5

   Extract caliper pistons
   With the caliper off the vehicle, place pads of wood between piston(s) and caliper body to prevent piston damage. Use compressed air carefully introduced through the brake hose port to walk pistons out of the bores. For multi-piston calipers, remove pistons sequentially, blocking already-extracted bores so remaining pistons receive full pressure. Alternatively, use a hydraulic piston extractor.
   ⚠️Compressed-air piston extraction can fire pistons out forcefully — keep fingers clear of bore mouth at all times.
6. 6

   Remove old seals and dust boots
   Using a non-metallic seal pick, carefully extract the dust boots and piston seals from the caliper bore grooves. Take care not to scratch or score the bore walls — bore damage will cause the rebuild to fail.
7. 7

   Clean and inspect caliper bores and pistons
   Clean the caliper body and bores thoroughly with brake parts cleaner. Inspect each bore for pitting, corrosion, or scoring. Inspect pistons for scoring, plating loss, or corrosion. Pistons with damage must be replaced — do not reuse marginal pistons. Bores with deep pitting condemn the caliper.
   ⚠If bore damage is found, the caliper assembly should be replaced rather than rebuilt. Do not attempt to hone Tesla performance caliper bores.
8. 8

   Install new piston seals and dust boots
   Lubricate new piston seals with fresh DOT 3 brake fluid and seat them in the inner bore groove. Install new dust boots in their outer groove. Lubricate piston exteriors with fresh DOT 3 fluid.
9. 9

   Reinstall pistons
   Carefully press each piston straight into its bore by hand or with a piston compressor. Pistons must enter squarely — any cocking will damage the new seal. Seat each piston fully and ensure the dust boot lip is properly engaged in the piston groove.
10. 10

    Service slide pins (if applicable)
    If the caliper design uses slide pins, clean them, inspect boots for tears, and apply silicone brake grease before reinstalling. Replace any torn boots.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
11. 11

    Reinstall pads and hardware
    Install brake pad hardware/clips in their original positions, then install pads (new pads recommended). Apply a thin film of silicone brake grease to pad backing contact points — never on the friction surface.
12. 12

    Reinstall caliper to vehicle
    If the caliper bracket was removed, reinstall it to the steering knuckle using threadlocker on the bracket bolts and torque to the manufacturer-specified value. Reinstall the caliper to the bracket and torque caliper bolts to specification.
    Torque spec

    Bracket Bolts102 Nm (75 lb-ft)

    Caliper Bolts88 Nm (65 lb-ft)
13. 13

    Reconnect brake hose
    Reconnect the brake hose to the caliper using NEW crush washers (if banjo) or properly seated threaded fitting. Torque to OEM specification — refer to Tesla Service Manual. Verify hose is not twisted and routes correctly without contacting suspension components through full steering and suspension travel.
    ⚠A twisted brake hose will fail prematurely under suspension cycling — verify free routing before bleeding.
14. 14

    Bleed the brake system
    Top off the master cylinder reservoir with fresh DOT 3 brake fluid. Bleed each caliper at the bleeder screw using a vacuum or pressure bleeder until clean, bubble-free fluid flows. Tesla recommends a scan-tool-initiated bleed sequence that cycles the ABS/iBooster module for a complete bleed; if such tool access is unavailable, perform a thorough manual bleed and then have the dealership/independent perform an ABS module bleed if pedal feel is not firm. Torque the bleeder screw to specification — do not overtighten.
    ⚠Never let the master cylinder reservoir run dry during bleeding — air will enter the iBooster and require dealer-level service to purge.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
15. 15

    Repeat for opposite front caliper
    Perform the identical rebuild on the opposite front caliper. Always service front calipers as a pair to maintain even braking.

Reassembly

1. Verify all hydraulic fittings are tight and dry.
2. Reinstall front wheels and hand-thread all lug nuts.
3. Lower vehicle until tires just contact the ground, then torque lug nuts in a star pattern.
4. Fully lower the vehicle.
5. Reconnect the 12V battery in the frunk (negative terminal last).
6. Close frunk and reinstall any access panels.
7. Top off the master cylinder reservoir to the MAX line with fresh DOT 3 brake fluid.
8. With the vehicle still in Jack Mode and key present, pump the brake pedal until firm before exiting Jack Mode.

Verification

• With the vehicle on, verify a firm brake pedal that does not sink under sustained pressure.
• Check the touchscreen for any brake-related alerts (ABS, brake booster, EPB).
• Exit Jack Mode and confirm air suspension self-levels normally.
• Inspect every hydraulic fitting and bleeder for leaks with the system pressurized.
• Perform a low-speed brake test (5-10 mph) in a safe area, checking for pull, noise, or sponginess before any road use.
• Gradually increase speed and perform progressively harder stops to bed in pads and verify caliper function.
• After 50-100 miles, re-inspect for leaks and re-check lug nut torque.
• Tesla recommends a brake fluid flush every 2 years regardless of mileage — log this rebuild date and schedule the next fluid service accordingly.

Related trouble codes on this vehicle

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