Q: How to inspect and replace rubber brake hoses and brake line on Toyota Highlander?
A: About every six months, inspect the rubber hoses that connect the steel brake lines with the front and rear brake assemblies for cracks, chafing, leaks, blisters, and other damage. Use a light and mirror for a thorough check. If any hose exhibits these conditions, replace it with a new one. To replace the front brake hose, loosen the wheel lug nuts, raise the vehicle, and remove the wheel. Unscrew the brake line fitting from the hose at the frame bracket using a flare-nut wrench. Remove the U-clip from the female fitting at the bracket with pliers and pass the hose through the bracket. At the caliper end, remove the banjo fitting bolt and separate the hose from the caliper. Replace the copper sealing washers with new ones. Remove the fastener from the strut bracket and detach the hose from it. To install the hose, pass the caliper fitting end through the strut bracket and connect it to the caliper with the banjo bolt and new sealing washers. Ensure the locating lug on the fitting is engaged with the hole in the caliper and tighten the bolt. Push the metal support into the strut bracket and install the U-clip, ensuring the hose isn't twisted. Route the hose into the frame bracket, making sure it isn't twisted, and connect the brake line fitting, tightening it securely. Bleed the caliper, install the wheel, lower the vehicle, and tighten the lug nuts. For the rear brake hose,bleed the caliper. When replacing brake lines, use genuine steel brake lines and ensure they are securely supported and have sufficient clearance. After installation, check the master cylinder fluid level, add fluid if necessary, bleed the brake system, and test the brakes before driving in traffic.