Brake Lines - Complete Set

Complete replacement of all brake lines on a 2018-2024 Honda Accord 1.5L Turbo, including routing, connection, and bleeding of the entire brake system.

Warnings

Tools required

Parts

• Complete brake line set (OEM or ISO-certified) × 1 — Use OEM Honda specification or ISO 4038/SAE J1047 compliant kit
• Brake line clips and retainers × 1 — Use OEM specification
• Copper crush washers for banjo fittings × 8 — Use OEM specification
• Thread sealant (brake-safe) × 1 — Use OEM specification or compatible

Fluids

• DOT 3 Brake Fluid — 2 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Loosen all wheel lug nuts while vehicle is on ground
3. Lift vehicle and support securely on jack stands at all four corners
4. Remove all four wheels
5. Apply penetrating oil to all brake line fittings and allow to soak for 15-30 minutes minimum (24 hours preferred for heavily corroded lines)
6. Place drain pans under work areas to catch brake fluid
7. Photograph or diagram the routing of all existing brake lines before removal
8. Have replacement lines unpacked and organized, verifying correct routing for each line
9. Verify you have fresh DOT 3 brake fluid from sealed containers only

Procedure

1. 1

   Disconnect master cylinder lines
   Working at the master cylinder in the engine bay, use flare nut wrenches to carefully disconnect the primary and secondary brake lines from the master cylinder. Expect significant fluid spillage. Cap the master cylinder ports immediately with clean plugs or tape to prevent contamination. Do not allow brake fluid to contact painted surfaces - flush immediately if contact occurs.
2. 2

   Remove front brake lines from calipers
   At each front caliper, use a flare nut wrench to disconnect the brake line from the caliper banjo fitting. Remove the banjo bolt and discard the copper crush washers (these must be replaced). Cap or plug the caliper ports to prevent fluid loss and contamination. Support the caliper with wire if needed to prevent strain on any remaining lines.
3. 3

   Remove rear brake lines from calipers or wheel cylinders
   At each rear brake assembly, disconnect the brake line using a flare nut wrench. Remove banjo bolts if equipped and discard crush washers. Cap all openings immediately. Note the routing of lines along the rear suspension and axle beam.
4. 4

   Remove brake line mounting clips and brackets
   Working methodically from master cylinder to each wheel, remove all clips, brackets, and retainers securing the brake lines to the chassis, suspension components, and body. Note the exact location of each clip for reinstallation. Remove bracket bolts where applicable and retain hardware.
   Torque spec

   Bracket Bolts97 Nm (71 lb-ft)
5. 5

   Extract old brake lines completely
   Carefully pull the old brake lines free from the vehicle, noting any routing through frame rails, along suspension arms, or through body panels. Verify routing matches your photographs. Inspect routing points for sharp edges or areas where new lines could chafe - address any issues with rubber grommets or protective sleeving.
6. 6

   Prepare and route new brake lines
   Starting with the longest runs from master cylinder to rear wheels, route new brake lines following the exact path of the originals. Ensure lines do not contact sharp edges, exhaust components, or moving suspension parts. Allow adequate slack for full suspension travel - lines should never be tight. If using universal lines requiring custom bending, use a proper bending tool to create smooth curves without kinks. Maintain minimum bend radius per manufacturer specifications.
7. 7

   Install mounting clips and brackets
   Secure all brake lines with the original or replacement clips and brackets. Lines must be firmly secured but not crushed. Install bracket bolts and torque to specification. Verify no line contacts moving parts through full suspension travel (have assistant cycle suspension if possible while vehicle is on stands).
   Torque spec

   Bracket Bolts97 Nm (71 lb-ft)
8. 8

   Connect lines to master cylinder
   At the master cylinder, carefully thread the new brake lines into the master cylinder ports. Use flare nut wrenches to avoid rounding fittings. Start threads by hand to ensure proper engagement. Tighten fittings to manufacturer specification (typically 15-18 Nm, but verify with service manual as this torque is not in provided database). Do not overtighten as this can damage flare seats.
9. 9

   Connect front brake lines to calipers
   At each front caliper, install new copper crush washers on both sides of the banjo fitting. Thread the banjo bolt through the line fitting and into the caliper. Torque banjo bolts to specification per service manual (typically 35-42 Nm for Honda, but verify as not in provided database). Verify washers are properly seated and no leaks are visible.
10. 10

    Connect rear brake lines
    Connect rear brake lines to calipers or wheel cylinders using new copper crush washers where applicable. Torque all fittings to specification. Double-check that all connections are tight and properly seated.
11. 11

    Inspect all connections and routing
    Perform a complete visual inspection of the entire brake line system. Verify: all fittings are tight, all clips are installed, no lines contact moving parts or sharp edges, proper slack exists for suspension movement, no visible kinks or damage to lines. This is a critical safety check - take your time.
12. 12

    Fill master cylinder reservoir
    Fill the brake master cylinder reservoir with fresh DOT 3 brake fluid from a sealed container to the MAX line. Keep the reservoir topped off throughout the bleeding process. Never let the reservoir run dry during bleeding as this introduces air into the ABS system.
13. 13

    Bleed brake system - rear passenger wheel
    Begin bleeding at the right rear wheel. Attach clear tubing to the bleeder screw and submerge the other end in a container with clean brake fluid. Have an assistant pump the brake pedal 3-5 times and hold pressure. Open the bleeder screw slightly until fluid flows, then close before pedal reaches floor. Repeat until fluid flows clear with no air bubbles. Torque bleeder screw to specification. Monitor master cylinder level constantly - refill as needed.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
14. 14

    Bleed remaining wheels in sequence
    Repeat the bleeding procedure for left rear, right front, then left front wheels in that exact order (RR, LR, RF, LF). This sequence ensures proper air evacuation. For each wheel, continue bleeding until fluid runs clear with absolutely no air bubbles. Torque each bleeder screw to specification after bleeding. Top off master cylinder to MAX line after completing all four wheels.
    Torque spec

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

    Reinstall wheels and perform pressure test
    Reinstall all four wheels and torque lug nuts to specification in a star pattern. Lower vehicle to ground. With engine off, pump brake pedal firmly 15-20 times. Pedal should become firm and hold constant pressure. If pedal is spongy or sinks, further bleeding is required. Start engine and verify power brake assist is functioning. Check all brake line connections for any sign of seepage or leakage.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Final torque check on all brake line fittings at master cylinder, calipers, and wheel cylinders
2. Verify brake fluid level is at MAX line in master cylinder reservoir
3. Inspect under vehicle for any brake fluid drips or wet spots at connections
4. Verify all brake line clips and brackets are secure
5. Confirm no brake lines contact exhaust, suspension, or sharp edges

Verification

• With engine running, apply firm brake pedal pressure - pedal should be firm and not sink
• Perform multiple hard stops from 20-30 mph in a safe area - brakes should apply evenly without pulling
• Re-inspect all connections after test drive for any signs of leakage
• Check brake fluid level - should remain at MAX line with no consumption
• Pedal feel should be firm and consistent - any sponginess indicates air in system requiring re-bleeding
• CRITICAL: If brake pedal feels soft, sinks to floor, or vehicle pulls during braking, DO NOT DRIVE. Re-inspect all connections and re-bleed system
• Re-torque wheel lug nuts after 50-100 miles of driving
• Monitor brake performance closely for the first several hundred miles

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