{
  "glb": "/models/components/rbrakes.glb",
  "parts": [
    {
      "id": "rear-rotor-left",
      "node": "rearRotorLeft",
      "label": "Rear Brake Rotor — Left (299mm)",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "981.352.031.00",
      "function": "Vented cast iron disc that provides the friction surface for rear brake pad clamping to generate stopping force.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-rotor-right",
      "node": "rearRotorRight",
      "label": "Rear Brake Rotor — Right (299mm)",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "981.352.032.00",
      "function": "Vented cast iron disc that provides the friction surface for rear brake pad clamping to generate stopping force.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-caliper-left",
      "node": "rearCaliperLeft",
      "label": "Rear Brake Caliper — Left (4-piston with EPB)",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "986.352.423.10",
      "function": "Fixed 4-piston caliper that clamps brake pads against the rotor and houses the integrated electronic parking brake motor-in-caliper actuator.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-caliper-right",
      "node": "rearCaliperRight",
      "label": "Rear Brake Caliper — Right (4-piston with EPB)",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "986.352.424.10",
      "function": "Fixed 4-piston caliper that clamps brake pads against the rotor and houses the integrated electronic parking brake motor-in-caliper actuator.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brake-pads",
      "node": "rearBrakePads",
      "label": "Rear Brake Pads",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "EBC DP42008R (upgrade)",
      "function": "Friction material pads that press against the rear rotors under hydraulic caliper clamping force to decelerate the vehicle.",
      "componentId": "rbrakes"
    },
    {
      "id": "epb-actuator-left",
      "node": "epbActuatorLeft",
      "label": "EPB Actuator — Left",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "970.352.091.05",
      "function": "Motor-in-caliper electric actuator that mechanically clamps the rear caliper pistons to hold the vehicle stationary when the electronic parking brake is engaged.",
      "componentId": "rbrakes"
    },
    {
      "id": "epb-actuator-right",
      "node": "epbActuatorRight",
      "label": "EPB Actuator — Right",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "970.352.092.05",
      "function": "Motor-in-caliper electric actuator that mechanically clamps the rear caliper pistons to hold the vehicle stationary when the electronic parking brake is engaged.",
      "componentId": "rbrakes"
    },
    {
      "id": "wheel-speed-sensor-rear-left",
      "node": "wheelSpeedSensorRearLeft",
      "label": "Wheel Speed Sensor — Rear Left",
      "assembly": "Sensors",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "991.606.407.01",
      "function": "Active Hall-effect sensor that reads the ABS tone ring to report rear-left wheel rotational speed to the ABS/PSM control unit.",
      "componentId": "rbrakes"
    },
    {
      "id": "wheel-speed-sensor-rear-right",
      "node": "wheelSpeedSensorRearRight",
      "label": "Wheel Speed Sensor — Rear Right",
      "assembly": "Sensors",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "991.606.407.01",
      "function": "Active Hall-effect sensor that reads the ABS tone ring to report rear-right wheel rotational speed to the ABS/PSM control unit.",
      "componentId": "rbrakes"
    },
    {
      "id": "abs-psm-hydraulic-unit",
      "node": "absPsmHydraulicUnit",
      "label": "ABS / PSM Hydraulic Control Unit",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "981.355.955.00",
      "function": "Bosch integrated ABS and Porsche Stability Management hydraulic modulator that independently regulates brake pressure at each wheel during ABS, traction control, and stability events.",
      "componentId": "rbrakes"
    },
    {
      "id": "brake-lines",
      "node": "brakeLines",
      "label": "Brake Lines (Hard & Stainless Braided Flex)",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "981.355.189.04",
      "function": "Hard steel lines and stainless braided flexible hoses that route hydraulic brake fluid from the master cylinder through the ABS unit to each caliper.",
      "componentId": "rbrakes"
    },
    {
      "id": "brake-fluid-reservoir",
      "node": "brakeFluidReservoir",
      "label": "Brake Fluid Reservoir",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "primary",
      "partNumber": "991.355.013.01",
      "function": "Translucent reservoir mounted on the brake master cylinder that stores and supplies DOT brake fluid to maintain system pressure and compensate for pad wear.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-001",
      "node": "brakeMasterCylinder",
      "label": "Brake Master Cylinder",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.355.130.26",
      "function": "Converts pedal force into hydraulic pressure that is transmitted through the brake lines to actuate all four calipers for braking.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-002",
      "node": "brakeServo",
      "label": "Brake Servo (Vacuum Booster)",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "991.355.125.26",
      "function": "Vacuum-assisted booster mounted between the brake pedal and master cylinder that multiplies driver pedal force to reduce braking effort.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-003",
      "node": "rotorDustShieldLeft",
      "label": "Rear Brake Disc Cover Plate — Left",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.352.801.02",
      "function": "Sheet metal splash shield mounted behind the rear rotor that deflects road debris and water away from the rotor and caliper.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-004",
      "node": "rotorDustShieldRight",
      "label": "Rear Brake Disc Cover Plate — Right",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.352.802.02",
      "function": "Sheet metal splash shield mounted behind the rear rotor that deflects road debris and water away from the rotor and caliper.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-005",
      "node": "caliperSealRepairSet",
      "label": "Rear Caliper Seal Repair Set",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "951.352.917.01",
      "function": "Piston seal and dust boot repair kit for the rear brake calipers, used when rebuilding calipers to restore hydraulic sealing and prevent fluid leaks.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-006",
      "node": "brakeFluid",
      "label": "Brake Fluid (DOT)",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "000.043.210.82",
      "function": "Hygroscopic hydraulic fluid that fills the brake system and transmits pedal force to the calipers; requires periodic replacement as it absorbs moisture and its boiling point degrades.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-007",
      "node": "brakeHoseRear",
      "label": "Rear Brake Hose (Flexi)",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "970.355.137.00",
      "function": "Flexible rubber hose that bridges the fixed hard brake line to the rear caliper, accommodating suspension movement while maintaining hydraulic pressure.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-008",
      "node": "padWearSenderWire",
      "label": "Brake Pad Wear Sender Wire — Rear",
      "assembly": "Sensors",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.609.163.00",
      "function": "Electrical lead connecting the rear brake pad wear sensor to the vehicle wiring harness, triggering a dashboard warning when pad material reaches minimum thickness.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-009",
      "node": "caliperBracketBoltLeft",
      "label": "Rear Caliper Bracket Bolt — Left",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "999.067.053.09",
      "parent": "rear-caliper-left",
      "function": "High-strength socket-head bolt that secures the rear brake caliper carrier bracket to the wheel carrier; torqued to specification and must be replaced after removal.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-010",
      "node": "caliperBracketBoltRight",
      "label": "Rear Caliper Bracket Bolt — Right",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "999.067.053.09",
      "parent": "rear-caliper-right",
      "function": "High-strength socket-head bolt that secures the rear brake caliper carrier bracket to the wheel carrier; torqued to specification and must be replaced after removal.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-011",
      "node": "discRetainingScrewLeft",
      "label": "Brake Disc Retaining Screw — Left",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "900.269.047.01",
      "parent": "rear-rotor-left",
      "function": "Countersunk bolt that locates the rear brake disc on the hub flange during assembly and installation of the wheel; prevents disc from dropping when the wheel is removed.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-012",
      "node": "discRetainingScrewRight",
      "label": "Brake Disc Retaining Screw — Right",
      "assembly": "Rotors",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "900.269.047.01",
      "parent": "rear-rotor-right",
      "function": "Countersunk bolt that locates the rear brake disc on the hub flange during assembly and installation of the wheel; prevents disc from dropping when the wheel is removed.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-013",
      "node": "caliperBleederValveLeft",
      "label": "Rear Caliper Bleeder Valve — Left",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "997.352.919.00",
      "parent": "rear-caliper-left",
      "function": "Threaded bleed nipple on the rear caliper that allows air to be purged from the hydraulic circuit during brake bleeding; includes protective dust cap.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-014",
      "node": "caliperBleederValveRight",
      "label": "Rear Caliper Bleeder Valve — Right",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "997.352.919.00",
      "parent": "rear-caliper-right",
      "function": "Threaded bleed nipple on the rear caliper that allows air to be purged from the hydraulic circuit during brake bleeding; includes protective dust cap.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-015",
      "node": "bleederDustCapLeft",
      "label": "Bleeder Valve Dust Cap — Left",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "930.351.927.00",
      "parent": "caliperBleederValveLeft",
      "function": "Protective rubber or plastic cap that seals the bleed nipple thread from contamination when the brake system is not being bled.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-016",
      "node": "bleederDustCapRight",
      "label": "Bleeder Valve Dust Cap — Right",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "930.351.927.00",
      "parent": "caliperBleederValveRight",
      "function": "Protective rubber or plastic cap that seals the bleed nipple thread from contamination when the brake system is not being bled.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-017",
      "node": "padAntiRattleSpring",
      "label": "Brake Pad Anti-Rattle Spring / Clip Set",
      "assembly": "Calipers",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "997.351.959.01",
      "function": "Spring steel clips that tension the brake pads against the caliper carrier abutments to eliminate pad rattle noise during light braking and normal driving.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-018",
      "node": "brakeLineHolderLeft",
      "label": "Rear Brake Line Holder — Left",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "944.612.627.00",
      "parent": "brake-lines",
      "function": "Plastic or metal retaining clip that secures the rear brake hard line or flexible hose to the chassis or suspension arm to prevent vibration and chafing.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-019",
      "node": "brakeLineHolderRight",
      "label": "Rear Brake Line Holder — Right",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "944.612.627.00",
      "parent": "brake-lines",
      "function": "Plastic or metal retaining clip that secures the rear brake hard line or flexible hose to the chassis or suspension arm to prevent vibration and chafing.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-020",
      "node": "rearBrakeLineLeft",
      "label": "Rear Brake Hard Line — Left",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.355.581.02",
      "parent": "brake-lines",
      "function": "Steel hard line that routes pressurised brake fluid from the ABS/PSM unit along the left side of the chassis to the rear left flexible hose connection.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-021",
      "node": "rearBrakeLineRight",
      "label": "Rear Brake Hard Line — Right",
      "assembly": "Hydraulics",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "981.355.582.02",
      "parent": "brake-lines",
      "function": "Steel hard line that routes pressurised brake fluid from the ABS/PSM unit along the right side of the chassis to the rear right flexible hose connection.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-022",
      "node": "epbSpringLeft",
      "label": "EPB Tension Spring — Left",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "970.352.723.00",
      "parent": "epb-actuator-left",
      "function": "Return tension spring within the EPB drum-in-hat or actuator mechanism that releases the parking brake shoes when the EPB is disengaged.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-023",
      "node": "epbSpringRight",
      "label": "EPB Tension Spring — Right",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "970.352.723.00",
      "parent": "epb-actuator-right",
      "function": "Return tension spring within the EPB drum-in-hat or actuator mechanism that releases the parking brake shoes when the EPB is disengaged.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-024",
      "node": "epbShoeLeft",
      "label": "EPB Brake Shoe — Left",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "970.352.993.01",
      "parent": "epb-actuator-left",
      "function": "Friction lining brake shoe inside the drum-in-hat section of the rear rotor that is pressed outward by the EPB actuator to provide parking hold force.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-025",
      "node": "epbShoeRight",
      "label": "EPB Brake Shoe — Right",
      "assembly": "Parking Brake",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "970.352.993.02",
      "parent": "epb-actuator-right",
      "function": "Friction lining brake shoe inside the drum-in-hat section of the rear rotor that is pressed outward by the EPB actuator to provide parking hold force.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-026",
      "node": "rearHubBearingLeft",
      "label": "Rear Wheel Hub Bearing — Left",
      "assembly": "Hub & Bearing",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "999.053.054.04",
      "function": "Angular contact ball bearing pressed into the rear wheel carrier that supports the rear hub and drive flange; commonly inspected or replaced during rear brake servicing.",
      "componentId": "rbrakes"
    },
    {
      "id": "rear-brakes-new-027",
      "node": "rearHubBearingRight",
      "label": "Rear Wheel Hub Bearing — Right",
      "assembly": "Hub & Bearing",
      "system": "Brakes",
      "tier": "sub",
      "partNumber": "999.053.054.04",
      "function": "Angular contact ball bearing pressed into the rear wheel carrier that supports the rear hub and drive flange; commonly inspected or replaced during rear brake servicing.",
      "componentId": "rbrakes"
    }
  ]
}