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Construction and failure modes

A brake hose consists of a rubber inner tube surrounded by braided reinforcement and an outer rubber sheath. The inner tube carries brake fluid at up to 100 bar during an emergency stop. Over time the inner rubber can swell or delaminate — a condition called inner hose collapse — where the hose acts as a one-way valve. Fluid flows to the calliper under pedal pressure but does not return freely when the pedal is released, causing the brake to drag and the wheel to overheat.

Stainless steel braided brake hoses are available as an upgrade over standard rubber hoses. They resist expansion under pressure better than rubber, giving a firmer pedal feel, and are more resistant to external damage.

Inspection and replacement intervals

Brake hoses should be inspected at every service for cracking, swelling, weeping, or abrasion. In the UK's road salt environment corrosion of the end fittings is as common as rubber degradation — inspect the metal ends and the area where the hose enters the fitting for rust. MOT inspectors check brake hoses for condition — a bulging, cracked, or leaking hose is an immediate failure.

There is no universal service interval for brake hoses. Most manufacturers recommend replacement every 6–10 years as a precaution regardless of appearance. After any brake hydraulic work, the hoses connected to that circuit should be inspected carefully.

• Inspect at every service — cracking, swelling, weeping
• Check metal end fittings for corrosion
• Inner collapse causes brake dragging and wheel overheating
• Replace every 6–10 years as a precaution
• Renew in pairs (both sides of an axle) for balanced braking

Fitting notes

Brake work requires care around brake fluid — it strips paint rapidly and should be kept off body panels. After replacing a hose, bleed the brake circuit at that corner to remove air. Use the registration lookup to find confirmed-fit brake hoses for your vehicle. Free UK delivery over £99.

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