TOYOTA 90947-02A16 Brake Hose

The genuine TOYOTA 90947-02A16 brake hose (flexible brake hose / HOSE, FLEXIBLE) is an essential safety component of the vehicle's hydraulic brake system. Its function is to transfer brake fluid under high pressure and without loss from the rigid metal brake lines to the moving brake calipers or wheel cylinders, while allowing unrestricted suspension travel and steering movement.

Technical Specifications and Parameters:

• Manufacturer: TOYOTA (OEM)
• Part Number: 90947-02A16
• Alternative / OEM Reference Numbers: 9094702967
• Material Construction: Multi-layer, high-strength synthetic rubber compound (EPDM) with internal textile or wire mesh reinforcement for minimal volumetric expansion and high pressure resistance.
• Fittings: Precision-threaded metal connectors with corrosion-resistant coating for a perfect, leak-free fit.
• Compatible Brake Fluids: DOT 3, DOT 4 standard hydraulic brake fluids.

Role and Operation of the Brake Hose:

During brake system operation, the high hydraulic pressure generated by the master cylinder is transmitted through the brake hoses to the wheel calipers. Because the wheels are in continuous motion due to suspension travel and steering maneuvers, flexible brake hoses must be used in these sections instead of rigid metal pipes. Genuine Toyota brake hoses are manufactured under strict quality standards to withstand high operating pressures, environmental hazards (moisture, mud, road salt), and continuous flexing stress.

Typical Symptoms of Wear and Failure:

Brake hoses are subject to natural aging; therefore, regular inspection and timely replacement are critical for road safety. Key signs of failure include:

• Visual Damage: Cracks, cuts, chafing, or surface blistering on the outer rubber layer.
• Leakage: Moisture or brake fluid seepage at the metal fittings or along the hose body.
• Altered Brake Pedal Feel: A soft, spongy brake pedal caused by weakening (expansion) of the hose's internal carcass, where pressure expands the hose wall rather than applying full clamping force at the brakes.
• Vehicle Pulling or Sticking Brakes: If the inner liner separates or swells internally, it can act as a one-way valve that prevents brake fluid from returning, causing brake drag or causing the vehicle to pull to one side when braking.