Brake Hose - Front

This procedure covers the replacement of the front brake hose on a 2024 Rivian EDV 500, including disconnecting the hydraulic line, removing the old hose, installing a new hose, and bleeding the brake system.

Warnings

Tools required

Parts

• Front brake hose assembly × 1 — Use OEM Rivian specification
• Brake hose mounting bracket bolt (if corroded) × 1 — Use OEM specification
• Copper crush washers for banjo bolt × 2 — Use OEM specification - typically 2 per connection
• Brake line cap plugs × 2 — Temporary use during service

Fluids

• DOT 4 Brake Fluid — 1 qt

Preparation

1. Park vehicle on a level, solid surface and engage parking brake
2. Place wheel chocks behind rear wheels
3. If available, use a Rivian-compatible scan tool to place the vehicle in service mode and document any existing brake system fault codes
4. Open the hood and locate the brake fluid reservoir near the driver's side of the vehicle
5. Check brake fluid level and condition - note if fluid appears dark or contaminated
6. Prepare a clean workspace with all tools, new parts, and fresh DOT 4 brake fluid within reach
7. Loosen the front wheel lug nuts approximately one turn while vehicle is on the ground
8. Lift the front of the vehicle using the designated lift points (consult owner's manual for exact locations on EDV 500 frame rails)
9. Secure vehicle on jack stands rated for at least 7,000 lbs at proper lift points
10. Remove the front wheel on the side requiring brake hose replacement
11. Clean the brake caliper, hose connections, and surrounding area with brake cleaner to prevent contamination

Procedure

1. 1

   Locate and inspect the brake hose routing
   Identify the front brake hose running from the chassis-mounted hard brake line to the brake caliper. Inspect the hose routing, noting the position of any mounting brackets or clips. Take photos for reference during reassembly. Check for any wheel speed sensors or ABS wiring that may be routed near the brake hose. On the EDV 500, the brake hose typically attaches to the caliper via a banjo bolt and to the chassis line via a threaded fitting with a bracket bolt securing it to the suspension or chassis.
2. 2

   Prepare brake fluid containment
   Position a catch pan beneath the brake caliper and connection points. Have clean shop rags ready to catch any dripping brake fluid. Prepare the brake line cap plugs to immediately seal the open hard line once the hose is disconnected. This minimizes fluid loss and prevents air from entering the system through the hard line side.
3. 3

   Disconnect brake hose from caliper
   Locate the banjo bolt securing the brake hose to the brake caliper. Using the appropriate size wrench (typically 10mm or 12mm), hold the brake hose fitting steady with one wrench while loosening the banjo bolt with another. Once loose, remove the banjo bolt completely and carefully pull the brake hose away from the caliper. Remove and discard both copper crush washers from either side of the banjo fitting. Immediately plug the caliper port with a clean rubber plug or wrap with clean plastic and secure with a zip tie to prevent fluid loss and contamination. Allow fluid to drain into the catch pan.
   ⚠Brake fluid will begin dripping immediately upon loosening the banjo bolt. Ensure the catch pan is properly positioned.
4. 4

   Remove brake hose mounting bracket
   Locate the bracket bolt that secures the brake hose to the suspension strut, control arm, or chassis bracket. This bracket prevents the hose from moving excessively. Using the appropriate wrench or socket, remove the bracket bolt and carefully slide the brake hose out of the bracket. Note the orientation of any washers or spacers for reinstallation.
5. 5

   Disconnect brake hose from hard line
   At the chassis connection point, use a flare nut wrench (line wrench) to loosen the threaded fitting connecting the flexible brake hose to the rigid brake line. This special wrench prevents rounding of the fitting. Turn counterclockwise to loosen. Once the fitting is loose, unthread it completely by hand if possible. Immediately install a brake line cap plug into the open hard line to prevent fluid loss and air entry. Allow the old hose to drain into the catch pan.
   ⚠Use only a flare nut wrench on brake line fittings. Standard open-end wrenches can round the soft brass or steel fittings, making removal extremely difficult.
6. 6

   Inspect connection points and clean threads
   With the old brake hose removed, inspect both connection points. Check the threads on the hard brake line fitting for damage, corrosion, or stripping. Inspect the banjo bolt threads on the caliper for damage. Use a wire brush to gently clean the threads on the hard line fitting and banjo bolt. Spray brake cleaner on all connection surfaces and wipe clean with a lint-free cloth. Inspect the brake caliper banjo port for any debris or corrosion.
7. 7

   Prepare new brake hose assembly
   Remove the new brake hose from its packaging. Verify it matches the old hose in length, fitting types, and routing configuration. Check that new copper crush washers are included or install new ones on the banjo fitting (one washer on each side of the connection). Remove any protective caps from the fittings. If the hose has any directional markings or routing indicators, note these for proper installation.
8. 8

   Connect new brake hose to hard line
   Remove the temporary cap from the chassis hard brake line. Position the new brake hose and thread the fitting onto the hard brake line by hand, turning clockwise. Ensure the fitting threads on smoothly without cross-threading. Once hand-tight, use the flare nut wrench to tighten the fitting. Without a specific torque specification, tighten firmly to approximately 11-13 ft-lbs (standard for brake line fittings of this type). Do not overtighten, as this can damage the fitting or flare.
   ⚠Cross-threading brake line fittings will damage the connection and create a leak. If resistance is felt, back off and restart threading carefully.
   ℹ️Torque specification not available in database. Use standard brake line fitting torque of 11-13 ft-lbs or consult Rivian service manual for exact specification.
9. 9

   Install brake hose in mounting bracket
   Route the brake hose through the mounting bracket on the suspension or chassis. Ensure the hose is not twisted and follows the same path as the original hose. The hose should have a natural curve without kinks or sharp bends. Install the bracket bolt and tighten to secure the hose in position. Without a specific torque, tighten to approximately 10-12 ft-lbs (typical for mounting brackets). Verify the hose has slight slack to allow for suspension movement.
10. 10

    Connect new brake hose to caliper
    Remove any protective plug from the brake caliper banjo port. Place one new copper crush washer on the banjo bolt, then position the brake hose banjo fitting against the caliper port. Place the second copper crush washer on the outside, then insert and hand-thread the banjo bolt. Ensure the brake hose is positioned correctly without twists. Without a specific torque specification, tighten the banjo bolt to approximately 18-22 ft-lbs (standard for brake caliper banjo bolts of this size). Verify the hose orientation allows proper routing and clearance from suspension components and the wheel.
    ⚠Always use new copper crush washers. Reusing old washers will likely result in brake fluid leaks.
    ℹ️Torque specification not available in database. Use standard brake caliper banjo bolt torque of 18-22 ft-lbs or consult Rivian service manual for exact specification.
11. 11

    Bleed the brake system at the affected corner
    Locate the bleeder valve on the brake caliper (typically on the top rear of the caliper body). Clean the bleeder valve area. Attach a clear plastic hose to the bleeder valve and route the other end into a clean container. Have an assistant slowly pump the brake pedal 3-5 times and hold pressure. Open the bleeder valve 1/4 to 1/2 turn while your assistant maintains pedal pressure. Watch for brake fluid and air bubbles flowing through the clear hose. Close the bleeder valve before your assistant releases the pedal. Repeat this process until no air bubbles appear in the fluid stream and only clean brake fluid flows. Check and top off the brake fluid reservoir frequently to prevent introducing air from an empty reservoir. If available, use a vacuum pump method or pressure bleeding system for more efficient bleeding.
    ⚠️Never allow the brake fluid reservoir to run empty during bleeding. This will introduce air into the ABS system, requiring more extensive bleeding procedures.
    ℹ️The Rivian EDV 500 may require a scan tool to cycle the ABS pump and valves for complete bleeding. If the brake pedal remains soft after standard bleeding, professional service with proper scan tool is required.
12. 12

    Check for leaks and verify connections
    With the brake system bled, carefully inspect all connection points for brake fluid leaks. Check the banjo bolt connection at the caliper and the threaded fitting at the hard line. Have an assistant apply firm brake pedal pressure and hold for 30 seconds while you inspect. Wipe all connections with a clean white cloth to identify any seeping fluid. If any leaks are detected, address immediately before proceeding. Tighten fittings slightly if needed, or replace components if leaks persist.
13. 13

    Perform brake pedal feel test
    With the vehicle still raised and secure, have an assistant pump the brake pedal several times. The pedal should build pressure and become firm. The pedal should not sink to the floor or feel spongy. If the pedal feels soft, additional bleeding is required. If the pedal sinks slowly, check for leaks or internal caliper issues. If the pedal feels normal, proceed to reinstallation.
14. 14

    Reinstall wheel and lower vehicle
    Reinstall the front wheel, threading lug nuts by hand first to prevent cross-threading. Tighten lug nuts in a star pattern to snug (but not final torque) while vehicle is on jack stands. Carefully lower the vehicle to the ground using the floor jack. Once the vehicle weight is on the wheels, torque the lug nuts to specification in a star pattern. For the 2024 Rivian EDV 500, typical wheel lug nut torque is approximately 150 ft-lbs, but verify with the vehicle's documentation or door jamb sticker for exact specification.
    ℹ️Lug nut torque specification not provided in database. Verify correct torque for Rivian EDV 500 wheels before final tightening.
15. 15

    Final brake system check and test drive
    Top off the brake fluid reservoir to the MAX line with fresh DOT 4 brake fluid. Securely install the reservoir cap. Start the vehicle and check for any brake system warning lights on the dashboard. If warning lights appear, address before driving. Pump the brake pedal multiple times with the vehicle running to build pressure. Perform a careful test drive in a safe area, testing brake function at low speeds first, then gradually increasing speed. Test for proper braking, unusual noises, pedal feel, and any pulling to one side. If any abnormalities are detected, do not continue driving and recheck all work performed.

Reassembly

1. Ensure all brake line connections are tight and leak-free before operating the vehicle
2. Verify brake hose routing matches the original configuration with no twists, kinks, or contact with suspension components
3. Confirm brake fluid level is at the MAX line in the reservoir with fresh DOT 4 fluid
4. Double-check wheel lug nuts are torqued to specification in a star pattern
5. If a scan tool was used for preparation, clear service mode and verify no active fault codes remain
6. Document the service date and mileage for maintenance records

Verification

• Visually inspect all brake line connections for any signs of brake fluid leakage
• Press the brake pedal firmly and verify it feels solid and does not sink to the floor
• Check that the brake pedal height and feel are consistent with pre-service conditions
• Verify no brake warning lights are illuminated on the instrument cluster
• Perform a low-speed test drive (under 15 mph) in a safe area to confirm normal brake operation
• Perform a controlled stop from 30 mph to verify proper braking force and straight-line stopping with no pulling
• Re-inspect all connection points after test drive for any new leaks or seepage
• Check brake fluid level again after test drive and top off if needed
• If available, use a scan tool to verify no new brake system fault codes have been generated
• Schedule a follow-up inspection after 50-100 miles to recheck connections and fluid level

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