Replace a single front brake rotor on a 2025 Rivian EDV 500, including removal of the wheel, caliper, and caliper bracket to access and replace the rotor.

Warnings

Tools required

Parts

• Front brake rotor × 1 — Use OEM specification for EDV 500
• Rotor set screw (if equipped) × 1 — M6 x 1.0mm

Fluids

• DOT 4 Brake Fluid — 0.25 qt

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Place wheel chocks behind rear wheels
3. Verify vehicle is in Park mode and power is OFF
4. Locate manufacturer-specified front jack points in service manual
5. Loosen front wheel lug nuts 1/4 turn while vehicle is still on ground
6. Lift front of vehicle with floor jack at specified lift point
7. Install jack stands at manufacturer-specified support points
8. Lower vehicle onto jack stands and verify stability before working underneath
9. Remove front wheel completely and set aside
10. Inspect brake system for fluid leaks, damaged lines, or other abnormalities before beginning work

Procedure

1. 1

   Inspect and document brake system condition
   Before disassembly, inspect the brake caliper, brake line connections, pad wear, and rotor condition. Take photos if this is warranty or insurance work. Check brake fluid level in reservoir under hood and note level for later comparison. If fluid is at minimum line, do not proceed as system may have a leak.
2. 2

   Disconnect brake pad wear sensor if equipped
   Locate the brake pad wear sensor connector if present on the caliper or pad assembly. Press the release tab and carefully disconnect the electrical connector. Secure the connector out of the way to prevent damage. Note connector orientation for reinstallation.
3. 3

   Remove caliper bolts and support caliper
   Locate the two caliper slide bolts on the back of the caliper assembly (typically 18mm). Remove both bolts completely and carefully lift the caliper off the rotor. DO NOT let the caliper hang by the brake hose. Use a wire hanger or bungee cord to suspend the caliper from the suspension or chassis, ensuring no tension or kinking of the brake line.
4. 4

   Remove caliper bracket
   Locate the two caliper bracket bolts that secure the bracket to the steering knuckle (typically 21mm). These bolts are usually torqued significantly higher than caliper slide bolts and may require substantial force to break free. Remove both bracket bolts completely and remove the entire bracket assembly. Keep track of any shims or hardware.
5. 5

   Remove rotor retaining screw if present
   Many rotors have a small Phillips or Torx screw (often T30 or T40) that retains the rotor to the hub during assembly. This screw may be corroded or thread-locked. Apply penetrating oil if stuck, then remove the screw completely. If the screw strips or breaks, it can be left in place or drilled out as it only serves assembly purposes.
6. 6

   Remove old brake rotor
   The rotor should slide off the wheel hub studs. If the rotor is stuck due to corrosion, use a rubber mallet to tap around the outer edge and inner hat section, alternating positions. Do NOT hit the rotor friction surface. If severely corroded, use penetrating oil around the hub center and allow to soak. Thread two appropriately-sized bolts into threaded holes in the rotor hat (if equipped) to press the rotor off the hub.
7. 7

   Clean hub surface and inspect
   With the rotor removed, clean the wheel hub mounting surface thoroughly with a wire brush and brake parts cleaner. Remove all rust, corrosion, and debris. The hub surface must be completely flat and clean for proper rotor seating. Inspect hub for damage, excessive wear, or bearing play. Check wheel studs for damage or excessive rust.
8. 8

   Install new brake rotor
   Remove any protective coating from the new rotor using brake parts cleaner on both friction surfaces. Apply a thin layer of anti-seize compound to the hub mating surface (NOT on rotor friction surfaces or wheel studs). Slide the new rotor onto the wheel hub, aligning it with the wheel studs. Ensure the rotor sits completely flat against the hub with no gaps or wobble.
9. 9

   Install rotor retaining screw
   If the rotor has a retaining screw hole, install the new or cleaned original screw with a small amount of thread locker. Tighten securely but do not overtorque this small fastener (typically 35-50 in-lbs). This screw only holds the rotor during wheel installation and is not critical to brake function.
10. 10

    Reinstall caliper bracket
    Position the caliper bracket back onto the steering knuckle, ensuring proper alignment with mounting holes. Install both bracket bolts and hand-tighten. Using a torque wrench, tighten bracket bolts to manufacturer specification in a cross pattern. WITHOUT manufacturer torque specs, DO NOT proceed - these are critical fasteners typically requiring 100-140 ft-lbs. Apply thread locker if specified by manufacturer.
11. 11

    Compress caliper piston
    Before reinstalling the caliper over the new rotor, the caliper piston(s) must be compressed to accommodate potentially thicker new rotor and pads. Use a brake caliper compression tool or large C-clamp against the piston and back of the caliper housing. Compress slowly and watch the brake fluid reservoir under hood - level will rise as piston compresses. If reservoir is too full, remove some fluid with a turkey baster to prevent overflow.
12. 12

    Reinstall brake caliper
    Remove the caliper from its supporting wire/bungee. Carefully position the caliper over the rotor and align with the bracket. Ensure brake pads are properly seated in bracket and that no brake hoses are twisted or kinked. Install both caliper slide bolts and hand-tighten. Torque caliper bolts to manufacturer specification (typically 25-35 ft-lbs for slide bolts). WITHOUT proper torque specs, have a professional complete this safety-critical step.
13. 13

    Reconnect brake pad wear sensor
    If your vehicle has a brake pad wear sensor, reconnect the electrical connector ensuring it clicks securely into place. Route the wire properly to prevent contact with the rotor or wheel, following the original routing path. Verify the connector is fully seated.
14. 14

    Reinstall wheel and lower vehicle
    Mount the wheel back onto the hub, aligning holes with studs. Install all lug nuts by hand, threading several turns to ensure proper engagement. Using the 19mm socket, tighten lug nuts in a star pattern until snug but not fully torqued. Raise vehicle slightly with floor jack to unload jack stands, remove jack stands, and lower vehicle completely to ground. Torque wheel lug nuts to manufacturer specification (typically 125-150 ft-lbs for this class of vehicle) in a star pattern using a torque wrench.

Reassembly

1. Torque all fasteners to manufacturer specifications - caliper bracket bolts, caliper slide bolts, and wheel lug nuts are all safety-critical
2. Ensure brake pad wear sensor (if equipped) is properly connected and secured
3. Verify brake hoses have no kinks, twists, or tension when suspension is at full droop and full compression
4. Check brake fluid reservoir level and top off with DOT 4 brake fluid if necessary after piston compression

Verification

• With vehicle still elevated or just lowered, pump brake pedal slowly 10-15 times until pedal becomes firm - this reseats the caliper piston against the new rotor
• Check brake fluid reservoir level and top off if needed with DOT 4 fluid to proper level
• Start vehicle and verify no brake warning lights remain illuminated (ABS may cycle briefly on first start)
• Before driving, perform a stationary brake pedal test - pedal should feel firm and not sink to floor with steady pressure
• Perform a low-speed test drive in a safe area, testing brakes at 5-10 mph to verify proper operation and no noise
• Perform 15-20 moderate brake applications from 30-40 mph to properly bed new rotor with brake pads following manufacturer bedding procedure
• After bedding, perform a final inspection of all fasteners for proper torque and check for any fluid leaks around caliper
• Avoid heavy braking for the first 200 miles to allow full bedding of rotor and pad surfaces
• Re-torque wheel lug nuts after 50-100 miles of driving

More procedures for this vehicle