Complete replacement of all brake lines from master cylinder to all four wheels, including hard lines and flexible hoses, followed by system bleeding and testing.

Warnings

Tools required

Parts

• Complete brake line kit for 2012-2017 Camry 2.5L or pre-bent OEM equivalent × 1 — Use OEM Toyota or quality aftermarket kit
• Front brake flexible hoses (left and right) × 2 — Toyota 90947-02B35 or equivalent
• Rear brake flexible hoses (left and right) × 2 — Toyota 90947-02B34 or equivalent
• Brake line clips and retainers × 1 — Various sizes, typically included in kit
• Copper crush washers for banjo bolts (if applicable) × 8 — Use OEM specification
• Thread sealant for brake fittings (if required) × 1 — Permatex 56521 or equivalent

Fluids

• DOT 3 Brake Fluid — 2 qt

Preparation

1. Park vehicle on level, solid surface and engage parking brake. Chock rear wheels if lifting front, front wheels if lifting rear.
2. Verify you have complete brake line kit or all individual lines needed for all four wheels. Compare parts to vehicle before starting.
3. Apply penetrating oil to all brake line fittings, mounting brackets, and bleeder screws. Allow to soak minimum 2 hours, preferably overnight.
4. Prepare clean workspace with all tools and new parts organized and within reach.
5. Have minimum 2 quarts DOT 3 brake fluid available. Use only fresh, unopened containers.
6. Review complete procedure before beginning. This is a complex job requiring multiple days if corroded fittings break.
7. Lift entire vehicle and support on jack stands at all four corners to access all brake lines. Ensure vehicle is completely stable.
8. Remove all four wheels and store safely.

Procedure

1. 1

   Document original brake line routing
   Before removing any lines, take detailed photographs from multiple angles showing exact routing of all brake lines from master cylinder to each wheel. Note locations of all clips, brackets, and mounting points. Measure lengths between fittings if not using pre-bent kit. Pay special attention to routing near exhaust, suspension components, and anywhere lines could be pinched or rubbed.
   ℹ️These photos are critical for proper reinstallation. Incorrect routing can cause line failure from heat, abrasion, or contact with moving parts.
2. 2

   Drain master cylinder reservoir
   Using a clean turkey baster or fluid transfer pump, remove as much brake fluid as possible from master cylinder reservoir. Dispose of old brake fluid according to local regulations. Wipe reservoir clean with lint-free cloth. This reduces spillage during line removal.
   ⚠Brake fluid damages paint. Cover fender and surrounding areas with protective material. Clean any spills immediately with water.
3. 3

   Remove flexible brake hoses at wheels
   Starting with front driver side, locate flexible brake hose where it connects to hard line and to caliper. Use flare nut wrench on hard line fitting (typically 10mm) while holding hose with another wrench to prevent twisting. Remove fitting slowly - expect fluid spillage. At caliper end, remove banjo bolt or threaded fitting. Catch fluid in drain pan. Immediately plug open ports with rubber caps or tape to prevent contamination. Repeat for all four wheels. Note which hoses came from which corner - front and rear hoses are different lengths.
   ⚠Use proper flare nut wrenches to prevent rounding off brake line fittings. Standard open-end wrenches will likely damage fittings.
   ⚠If fitting will not loosen with reasonable force, stop and apply more penetrating oil. Twisted or broken lines will significantly extend repair time.
4. 4

   Remove hard lines from master cylinder to rear axle junction
   Trace main brake lines from master cylinder toward rear of vehicle. At master cylinder, use flare nut wrench to disconnect hard lines. On Camry, typically two lines exit master cylinder. Follow lines along frame rail, removing mounting clips and brackets. Most clips can be pried open or have tabs to release. Note exact clip locations. Work toward rear junction block or ABS modulator. Disconnect lines at junction points using flare nut wrenches. Remove entire assembly of hard lines from front to rear.
   ℹ️Lines may be routed through tight spaces in engine bay and along frame. May need to remove heat shields or other components for access.
5. 5

   Remove rear brake hard lines
   From rear junction block or axle mount, trace hard lines to each rear wheel. Remove any clips or brackets securing lines to frame, axle, or body. Disconnect lines at all junction points. On Camry, rear lines typically run along rear subframe or axle. Remove complete rear brake line assembly. Keep track of which line went to which side.
   ⚠Rear lines often have more corrosion due to road spray. Extra care needed to prevent fitting damage.
6. 6

   Remove front brake hard lines
   From master cylinder or ABS unit, trace hard lines to front wheel junctions where flexible hoses attach. Remove mounting clips along frame and suspension. Disconnect at all junction points. Remove complete front brake line assemblies for both sides. Front lines on Camry typically route along inner fender and down to strut area.
   ℹ️Front lines may route behind engine or near exhaust manifold. Allow exhaust to cool completely before reaching into these areas.
7. 7

   Clean all mounting points and fittings
   With all old lines removed, use wire brush to clean all mounting bracket locations, clip attachment points, and threaded fittings at master cylinder, ABS unit, junction blocks, and any intermediate connections. Remove all rust, old thread sealant, and debris. Inspect all mounting brackets - replace any that are damaged or severely corroded. Clean master cylinder outlet ports thoroughly.
   ⚠Ensure no debris falls into open brake system ports. Keep all openings plugged until ready to connect new lines.
8. 8

   Install new brake lines from master cylinder to rear junction
   Starting at master cylinder, install new main brake lines following exact routing documented in photos. If using pre-bent kit, lines should match original routing closely. Thread fittings at master cylinder hand-tight first. Install all mounting clips and brackets in original locations as you route lines toward rear. Ensure lines do not contact exhaust, sharp edges, or moving suspension/drivetrain components. Maintain minimum 1 inch clearance from exhaust. Once routing is verified correct, tighten master cylinder fittings with flare nut wrench - typically 15-17 Nm but use moderate force until fitting seats properly. Do not overtighten.
   ⚠️Improper routing can cause brake line failure. Lines must not contact exhaust (will melt), moving parts (will wear through), or sharp edges (will cut). Verify clearance through full suspension travel.
   ⚠Overtightening flare fittings will crack the flare. Tighten until snug plus 1/6 turn. Fitting should seal without excessive force.
9. 9

   Install rear brake hard lines
   Route new rear hard lines from junction block to rear wheel connection points following original routing. Install all mounting clips and brackets. Ensure proper clearance from suspension, differential, exhaust, and moving components through full range of suspension travel. Connect fittings at junction block and at rear flex hose connection points. Hand-tighten all fittings first, verify routing, then torque to specification with flare nut wrench.
   ⚠Rear suspension travel can be significant. Verify lines have adequate slack and will not be pulled tight at full droop or compressed at full compression.
10. 10

    Install front brake hard lines
    Route new front hard lines from master cylinder or ABS unit to front wheel connection points. Follow original routing exactly. Install all mounting clips and brackets in correct locations. Ensure lines clear steering components through full lock-to-lock travel and suspension through full compression and droop. Connect all fittings hand-tight, verify routing and clearances, then torque with flare nut wrench.
    ⚠️Front lines must clear steering components through full lock-to-lock travel. Turn steering wheel fully left and right while verifying clearance before final tightening.
11. 11

    Install new flexible brake hoses
    Install new flexible brake hoses at all four wheels. At caliper end, use new copper crush washers on banjo bolts if applicable. Thread fittings hand-tight first. At hard line end, use flare nut wrench and tighten fitting to specification. Ensure flexible hoses are not twisted - there should be a natural curve with no torsion. Hoses must have adequate length to allow full suspension travel and steering movement without stretching. Tighten caliper end banjo bolts or fittings to specification. Verify hose moves freely and does not contact tire, wheel, or suspension through full range of motion.
    ⚠️Twisted flexible hoses will fail prematurely. Ensure hose hangs naturally with no twist before tightening fittings.
    ⚠️Flex hoses must not contact tire at any point through full steering and suspension travel. Verify with wheels turned full lock and suspension compressed.
    Torque spec

    Mounting Bolts27 Nm (20 lb-ft)
12. 12

    Inspect entire brake line system
    With all new lines installed, perform complete visual inspection of entire system. Verify all fittings are properly tightened with flare nut wrench. Check that every mounting clip and bracket is installed and secure. Verify no lines contact exhaust, sharp edges, or moving parts. Turn steering wheel lock-to-lock and verify front lines and hoses have adequate clearance. Push down on each corner of vehicle to compress suspension and verify lines have adequate slack. Check that all flexible hoses hang naturally without twisting. Verify master cylinder reservoir cap is loose or removed for bleeding process.
    ⚠️This inspection is critical. Any routing error, missing clip, or clearance issue can cause brake failure. Take time to verify every detail.
13. 13

    Fill master cylinder and perform initial gravity bleed
    Fill master cylinder reservoir to MAX line with fresh DOT 3 brake fluid. Beginning at wheel furthest from master cylinder (typically right rear), remove bleeder screw cap and attach clear hose to bleeder screw. Place other end of hose in catch bottle. Open bleeder screw 1/2 turn. Allow fluid to gravity-feed through system. Watch for fluid to begin flowing from bleeder. When fluid flows steadily, close bleeder screw. Move to next furthest wheel (typically left rear, then right front, then left front). Keep master cylinder topped off throughout - check level after each wheel. This initial gravity bleed removes bulk of air from system.
    ⚠️NEVER allow master cylinder to run dry. Introducing air into master cylinder or ABS unit will require extensive bleeding or scan tool activation.
    ⚠Use only fresh brake fluid from unopened containers. Brake fluid absorbs moisture from air and contaminated fluid reduces braking performance.
    Torque spec

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

    Perform pressure or vacuum bleeding
    With gravity bleed complete, perform thorough pressure or vacuum bleeding. Bleeding sequence: Right Rear, Left Rear, Right Front, Left Front. At each wheel, attach bleeder hose to bleeder screw. If using pressure bleeder, attach to master cylinder per tool instructions and pressurize to 20 PSI. If using vacuum bleeder, attach to bleeder screw. Open bleeder screw and allow fluid to flow until no air bubbles visible in clear hose for at least 30 seconds. Close bleeder screw before releasing pressure or vacuum. Torque bleeder screw properly - do not overtighten as they are easily damaged. Repeat sequence at least twice to ensure all air is removed. Monitor master cylinder level constantly.
    ⚠️Air in brake system will cause soft pedal and reduced braking ability. Continue bleeding until absolutely no air bubbles appear in fluid stream.
    ⚠Bleeder screws are brass and strip easily. Use proper 6-point socket or wrench and torque to specification.
    Torque spec

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

    Check for leaks and test brake pedal
    With bleeding complete, fill master cylinder to MAX line and install cap. Wipe all brake line fittings, connections, and bleeder screws completely dry with clean cloth. Start engine and press brake pedal firmly multiple times. Pedal should feel firm and not sink to floor. With pedal depressed, inspect every fitting, connection, and bleeder screw for any sign of leaking fluid. Check entire length of all brake lines for seepage. If any leaks found, shut off engine, repair leak, re-bleed affected section. If pedal feels soft or spongy, repeat bleeding procedure. Pedal MUST feel firm before proceeding.
    ⚠️Soft or spongy brake pedal indicates air in system. DO NOT drive vehicle until pedal is firm. A pedal that slowly sinks to floor indicates a leak - find and repair before driving.
    ⚠️Even small leaks will worsen and cause brake failure. Every connection must be completely dry with no seepage.
16. 16

    Install wheels and perform final torque
    Install all four wheels. Thread lug nuts by hand first to ensure proper thread engagement. Using torque wrench, tighten lug nuts in star pattern to specification. Lower vehicle to ground. With vehicle weight on wheels, perform final torque of lug nuts in star pattern.
    ⚠Always torque lug nuts in star pattern to prevent wheel runout and uneven loading of studs.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Verify master cylinder reservoir is at MAX level and cap is properly installed
2. Confirm all brake line mounting clips and brackets are installed and secure
3. Verify no tools or parts left in wheel wells or under vehicle
4. Double-check all fittings are tight and no leaks present at any connection point

Verification

• Start engine and pump brake pedal several times. Pedal must feel firm and consistent. If pedal feels soft, spongy, or sinks slowly, repeat bleeding procedure - there is still air in the system.
• With engine running and pedal depressed, perform final leak check of all fittings, connections, brake lines, and flexible hoses. Everything must be completely dry with no seepage.
• Perform test drive in safe area with no traffic. Begin at low speed (5-10 mph) and verify brakes respond normally. Gradually increase speed and test braking at various pressures. Brakes should feel firm and responsive with no pulling to either side.
• After test drive, re-inspect all connections for leaks. Check master cylinder fluid level - should remain at MAX line.
• If vehicle has ABS, perform ABS activation test: on dry pavement in safe area, perform hard brake application from 25 mph to trigger ABS. System should pulse normally. If ABS warning light illuminates or system does not function properly, ABS unit may need scan tool bleeding procedure at qualified shop.
• Re-check lug nut torque after first 50 miles of driving.
• Monitor brake system closely for first several hundred miles. Check fluid level weekly and inspect for leaks at all connections.

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