Why change the Extended Brake Lines? Every time you apply pressure to the brake pedal, your brake line rubber expands a bit due to the high hydraulic pressure (volumetric expansion) used during braking, which eventually causes the brake lines to ‘soften’, increasing with age, resulting in a soft spongy feel in the brake pedal.
When you have that feeling, then it is possible that new brake lines are required. If a lift has been fitted to the vehicle with already softened brake Lines, this can further result in brake line failure. Individual Rubber Brake Lines - ABS Rh Fr 3-4 compatible with Landcruiser 80/105