Brake Hose - Front

Replace the front brake hose on a 2025 Rivian EDV 500, including bleeding the brake system to restore proper braking function.

Warnings

Tools required

Parts

• Front brake hose assembly × 1 — Use OEM Rivian specification
• Brake hose mounting clip (if damaged) × 1 — Use OEM specification
• Copper crush washers for banjo bolt × 2 — Use OEM specification
• Brake line to hose fitting washers × 2 — Use OEM specification if applicable

Fluids

• DOT 4 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level ground and place wheel chocks behind rear wheels
2. Ensure vehicle is in Park mode and power is off
3. Do NOT disconnect the 12V battery as this may cause electronic brake control module errors
4. Loosen front wheel lug nuts while vehicle is on ground (do not remove)
5. Lift front of vehicle using approved lift points and secure with jack stands rated for vehicle weight
6. Remove front wheel on side requiring brake hose replacement
7. Clean the brake hose fittings, brackets, and surrounding area with wire brush and penetrating oil if corroded
8. Place brake fluid catch container under work area to catch spilled fluid
9. Have fresh DOT 4 brake fluid ready and keep container sealed until needed

Procedure

1. 1

   Locate and access the front brake hose
   Identify the front brake hose running from the chassis-mounted hard brake line to the brake caliper. The hose will be secured to the chassis or suspension component with a mounting bracket/clip. Inspect the entire hose path to identify both connection points and the mounting clip location.
2. 2

   Prepare brake line connections
   Using a flare nut wrench (critical to prevent rounding off fittings), slightly loosen the hard brake line fitting where it connects to the flexible brake hose at the chassis mount. Do not fully remove yet. Apply penetrating oil if the fitting is resistant. Note: some configurations use a banjo bolt at the caliper end, others use a threaded fitting.
3. 3

   Disconnect brake hose from caliper
   If using a banjo bolt connection: Use a combination wrench to remove the banjo bolt securing the brake hose to the brake caliper. Brake fluid will begin to leak immediately. Allow fluid to drain into catch container. Remove and discard the two copper crush washers on either side of the banjo fitting. If using a threaded fitting: use a flare nut wrench to disconnect the hose from the caliper. Immediately plug the caliper port with a brake line plug or hemostat clamp to minimize fluid loss and air entry.
   ⚠Brake fluid will spray out under residual system pressure. Wear safety glasses and gloves. Keep fluid away from painted surfaces.
4. 4

   Disconnect brake hose from chassis hard line
   Using the flare nut wrench, fully unscrew the flexible brake hose from the hard brake line connection at the chassis or suspension mounting point. The hose will have a threaded fitting that screws into the hard line or a junction block. Allow fluid to drain into catch container. Plug the hard brake line with a brake line plug or clamp to prevent further fluid loss and contamination.
5. 5

   Remove brake hose mounting bracket
   Locate the mounting clip or bracket that secures the brake hose to the chassis or suspension component. This is typically a metal or plastic clip. Remove the fastener (bolt or clip) securing the hose bracket. Carefully extract the brake hose from the mounting bracket. Inspect the bracket for damage and replace if bent or cracked.
6. 6

   Remove old brake hose
   With all connections and brackets released, remove the old brake hose assembly from the vehicle. Inspect the old hose for the failure mode (cracking, bulging, leaking, chafing). This helps confirm proper routing of the new hose. Dispose of the old hose properly.
7. 7

   Prepare new brake hose
   Remove the new brake hose from packaging. Verify it matches the old hose in length, fitting types, and mounting bracket configuration. Do NOT remove protective caps from fittings until ready to install. If using banjo bolt connections, install NEW copper crush washers on the banjo fitting (one on each side). Never reuse old crush washers.
8. 8

   Install brake hose to chassis hard line
   Remove the protective cap from the chassis-side fitting of the new brake hose. Remove the plug from the hard brake line. Immediately thread the new brake hose fitting into the hard brake line connection by hand to start the threads. Once hand-tight, use the flare nut wrench to snug the fitting. Do not fully torque yet. Ensure the hose is not twisted and will route naturally to the caliper.
9. 9

   Install brake hose mounting bracket
   Insert the brake hose into the mounting bracket/clip at the correct orientation. Secure the bracket to the chassis or suspension component with the fastener. Ensure the hose is not kinked, twisted, or under tension. The hose should have slight slack to allow for suspension movement.
10. 10

    Connect brake hose to caliper
    Remove the protective cap from the caliper-side fitting and remove the plug from the caliper port. If using a banjo bolt: Position the banjo fitting against the caliper with NEW copper crush washers on both sides, insert the banjo bolt, and hand-tighten. If using a threaded fitting: thread the hose fitting into the caliper by hand, then snug with a flare nut wrench. Verify the hose routing allows full steering and suspension travel without strain.
    ℹ️Ensure the brake hose is not twisted. The orientation markings or striping on the hose should follow a straight line along its length.
11. 11

    Torque all brake line connections
    Since specific torque values are not provided in the database, consult the Rivian service manual for exact specifications. Typical values are 11-14 ft-lbs for banjo bolts and 10-12 ft-lbs for flare fittings, but VERIFY with manufacturer specifications. Use a torque wrench to tighten: 1) The chassis hard line to hose connection, 2) The caliper to hose connection (banjo bolt or threaded fitting). Over-torquing can damage fittings; under-torquing can cause leaks or disconnection.
    ⚠️Brake line connections must be torqued to exact manufacturer specifications. Incorrect torque can result in fitting failure and complete brake loss. DO NOT GUESS at torque values. Obtain proper specifications before proceeding.
12. 12

    Reinstall wheel and lower vehicle
    Reinstall the front wheel and hand-tighten the lug nuts in a star pattern. Lower the vehicle until the wheel just touches the ground (weight not fully on wheel). Use a torque wrench to tighten lug nuts to manufacturer specification (typically 130-140 ft-lbs for Rivian vehicles, but verify). Fully lower vehicle and remove jack stands and jack.
13. 13

    Fill brake fluid reservoir
    Open the hood and locate the brake fluid reservoir. Check the fluid level - it will be low due to fluid loss during hose replacement. Fill the reservoir to the MAX line with fresh DOT 4 brake fluid. Keep the cap off for now as bleeding will be performed next.
14. 14

    Bleed the affected brake circuit
    Attach clear plastic tubing to the bleeder valve on the brake caliper where the hose was replaced. Submerge the other end of the tubing in a container with a small amount of clean brake fluid. Have an assistant pump the brake pedal 5-10 times and hold firm pressure. Open the bleeder valve 1/2 turn - fluid and air will exit. Close the bleeder before the pedal reaches the floor. Repeat until fluid flows with no air bubbles. Check reservoir level frequently and refill to prevent introducing more air.
    ⚠If the brake pedal goes to the floor during bleeding, stop immediately and check all connections for leaks. Do NOT continue bleeding with a floor-pedal condition.
15. 15

    Perform system-wide brake bleeding (if required)
    The Rivian EDV 500 may have an integrated brake system requiring electronic ABS pump activation for complete bleeding. If the brake pedal remains soft after initial bleeding, an OBD-II scan tool with Rivian-compatible software may be required to activate the ABS pump and cycle solenoids. Follow the scan tool's brake bleeding procedure. Alternatively, contact a Rivian service center for ABS system bleeding. Bleed all four corners in the sequence: right rear, left rear, right front, left front. Refill reservoir to MAX level when complete.

Reassembly

1. Verify all brake line connections are torqued to specification and show no signs of leakage
2. Ensure brake hose is properly secured in mounting bracket with no twisting or kinking
3. Confirm brake hose has adequate clearance for full steering lock and suspension travel
4. Tighten brake fluid reservoir cap securely
5. Wipe down all brake components and painted surfaces to remove any spilled brake fluid
6. Reinstall any splash shields or wheel well liners that were removed for access

Verification

• With vehicle safely supported or on level ground, pump brake pedal firmly 10-15 times. Pedal should become firm and hold steady pressure. If pedal remains soft or sinks slowly, additional bleeding or repair is required.
• Start the vehicle and allow brake system to initialize. Warning lights related to brakes should extinguish within a few seconds. If ABS, Brake, or traction control warnings remain illuminated, system bleeding may be incomplete or electronic initialization may be required.
• Inspect all brake line connections for any signs of fluid seepage. Wipe connections dry with a clean cloth, then check again after pumping brakes.
• Perform a low-speed test drive in a safe area (empty parking lot). Test brakes at 5-10 mph to verify normal function and firm pedal feel before returning to normal driving.
• After test drive, re-inspect all connections for leaks. Check brake fluid level and top off if needed.
• Monitor brake pedal feel and response for the first several drives. Any change in pedal feel, unusual noises, or warning lights requires immediate professional inspection.
• If brake pedal feel is not completely normal or you have any doubts about the repair, DO NOT DRIVE THE VEHICLE. Seek professional service immediately.

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