Brake Hose - Front

Replace the front brake hose connecting the brake line to the caliper, including bleeding the brake system to restore proper hydraulic function.

Warnings

Tools required

Parts

• Front brake hose × 1 — Use OEM Maserati specification
• Copper crush washers for banjo bolt × 2 — Use OEM specification, 2 per hose
• Brake hose retaining clip (if applicable) × 1 — Inspect and replace if damaged

Fluids

• DOT 4 Racing Brake Fluid — 0.5 qt

Preparation

1. Park vehicle on level surface and engage parking brake. Place wheel chocks behind rear wheels.
2. Loosen front wheel lug nuts 1/4 turn before raising vehicle.
3. Raise front of vehicle with floor jack and support securely on jack stands at designated lift points. Never work under a vehicle supported only by a jack.
4. Remove front wheel completely.
5. Open brake fluid reservoir and extract fluid to MIN line using turkey baster or extraction pump to prevent overflow during hose removal.
6. Have assistant available for brake bleeding procedure or use pressure/vacuum bleeding equipment.
7. Locate brake hose to be replaced - it connects the rigid brake line on the chassis to the caliper banjo fitting.
8. Clean area around brake hose fittings with brake cleaner and wire brush to prevent contamination during disassembly.

Procedure

1. 1

   Disconnect banjo bolt from caliper
   Place catch pan under caliper. Using appropriate wrench, loosen and remove the banjo bolt securing the brake hose to the caliper. Brake fluid will drain out. Immediately plug the caliper port with a clean rag or rubber cap to minimize fluid loss and contamination. Remove and discard both copper crush washers from the banjo fitting.
   ⚠Brake fluid will spray out when banjo bolt is loosened. Keep catch pan positioned and avoid getting fluid on brake pads, rotor, or painted surfaces.
   Torque spec

   Brake Hose Banjo Bolt25 Nm (18 lb-ft)
2. 2

   Disconnect brake hose from chassis bracket
   If equipped, remove the retaining clip or spring clip securing the brake hose to the chassis bracket. Note the orientation and position of any bracket mounting hardware for reassembly. If the hose is threaded into the bracket, carefully support the hose while proceeding to next step.
   Torque spec

   Brake Hose Bracket10 Nm (7 lb-ft)
3. 3

   Disconnect brake line from hose
   Using a line wrench (flare nut wrench) on the brake line fitting and a backup wrench on the brake hose fitting, loosen the connection between the rigid brake line and the flexible hose. Turn the line fitting counterclockwise while holding the hose fitting steady. Once loosened, unthread completely and separate. Immediately cap or plug both openings to prevent contamination.
   ⚠Use a line wrench, not a standard open-end wrench, to prevent rounding the soft brass fitting. Apply backup wrench to prevent twisting the brake hose or line.
   Torque spec

   Line Fittings22 Nm (16 lb-ft)
4. 4

   Remove old brake hose
   Remove the brake hose from the vehicle. Inspect the routing path, noting how the hose is positioned relative to suspension components, frame members, and the steering system. The hose must not contact any moving parts through full suspension travel and steering lock-to-lock. Take photos if necessary for reference during installation.
   ℹ️Check for evidence of hose rubbing, abrasion, or contact with suspension components that may have caused the failure.
5. 5

   Prepare and install new brake hose
   Remove protective caps from new brake hose. Verify the hose length and end fittings match the original. Install new copper crush washers on both sides of the banjo fitting (one washer on each side of the caliper boss). Route the new hose following the exact path of the original, ensuring it will not contact suspension or steering components. Install hose into chassis bracket if applicable, securing with retaining clip in original orientation.
   ⚠️New copper crush washers MUST be installed on both sides of banjo bolt. Reusing old washers will result in brake fluid leaks and potential brake failure.
   Torque spec

   Brake Hose Bracket10 Nm (7 lb-ft)
6. 6

   Connect brake line to new hose
   Thread the rigid brake line fitting into the new brake hose fitting by hand until finger-tight. Ensure threads engage smoothly without cross-threading. Using line wrench on the line fitting and backup wrench on hose fitting, tighten to specification. Verify hose routing remains correct with no twisting of the hose body.
   ⚠Do not twist the brake hose while tightening. The hose body should hang naturally without torsion load.
   Torque spec

   Line Fittings22 Nm (16 lb-ft)
7. 7

   Connect banjo bolt to caliper
   Position the banjo fitting against the caliper with new copper washers installed on both sides. Insert banjo bolt through fitting and thread into caliper by hand. Verify washers remain properly positioned. Using torque wrench, tighten banjo bolt to specification. Ensure hose orientation allows clearance through full suspension travel and steering movement.
   ⚠️Verify copper washers are present on BOTH sides of banjo fitting before tightening. Missing washer will cause immediate brake fluid leak.
   Torque spec

   Brake Hose Banjo Bolt25 Nm (18 lb-ft)
8. 8

   Verify hose routing and clearances
   With hose installed, turn steering wheel lock-to-lock and compress/extend suspension by pushing down on vehicle. Visually verify brake hose does not contact any suspension components, steering components, wheel, tire, or chassis members throughout full range of motion. Hose should have slight slack but not excessive drooping. Adjust routing at bracket if necessary.
   ⚠️Brake hose contact with moving parts will cause hose failure and complete loss of braking. Verify clearance with suspension at full compression and full extension.
9. 9

   Fill brake fluid reservoir
   Refill brake fluid reservoir to MAX line with fresh DOT 4 Racing brake fluid from a sealed container. Keep reservoir cap off for bleeding procedure but prevent contamination. Do not reuse old brake fluid or use fluid from a previously opened container.
   ⚠Only use DOT 4 Racing brake fluid as specified for this vehicle. Using incorrect fluid can damage seals and cause brake system failure.
10. 10

    Bleed brake caliper
    Attach clear tubing to bleeder screw and submerge other end in catch container with small amount of clean brake fluid. Have assistant press brake pedal slowly 3-4 times and hold. Open bleeder screw 1/2 turn, allow fluid and air to escape until flow stops, then close bleeder screw before assistant releases pedal. Repeat process until no air bubbles appear in tubing and fluid runs clear. Check reservoir level frequently and maintain above MIN line. Final tighten bleeder screw to specification.
    ⚠️Never allow reservoir to empty during bleeding. Air in ABS system requires specialized scan tool bleeding procedures.
    ⚠Close bleeder screw BEFORE assistant releases brake pedal to prevent air from being drawn back into system.
    Torque spec

    Bleeder Screw14 Nm (10 lb-ft)
11. 11

    Check for leaks and verify system
    With assistant holding firm brake pedal pressure, inspect all connections at banjo bolt, line fitting, and bracket for any signs of brake fluid leakage. Wipe connections clean with white rag to verify no seepage. Check brake pedal feel - it should be firm and not sink slowly to floor. If pedal is soft or spongy, additional bleeding is required. Top off reservoir to MAX line and install cap securely.
    ⚠️Any brake fluid leak must be corrected before operating vehicle. Do not drive vehicle with soft or spongy brake pedal.

Reassembly

1. Reinstall wheel and hand-tighten lug nuts in star pattern.
2. Lower vehicle from jack stands to ground.
3. Torque wheel lug nuts to specification in star pattern using torque wrench.
4. Repeat procedure for opposite side if replacing both front brake hoses.
5. Perform final brake fluid level check and top off to MAX line if needed.
6. Clean any brake fluid residue from wheels, calipers, and chassis components.

Verification

• With engine off, pump brake pedal multiple times. Pedal should become firm and not sink to floor when held under pressure.
• Visually inspect all brake hose connections for leaks with pedal pressure applied.
• Verify brake hose clearance by turning steering lock-to-lock and bouncing suspension with pedal released.
• Start engine and verify brake warning light is off. Apply firm brake pressure and verify no leaks appear.
• Perform low-speed brake test in safe area (5-10 mph) to verify proper brake function before normal driving.
• Test drive vehicle in safe area at increasing speeds, verifying straight-line braking with no pull or unusual pedal feel.
• Recheck all torque specifications after test drive, especially banjo bolt and line fittings.
• Check brake fluid level after test drive and top off if necessary. Fluid level should stabilize after bleeding.

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