Hyundai i20 Brake Master Cylinder (2008 - 2015) - 585101J100

Hyundai i20 Brake Master Cylinder (2008 - 2015) - 585101J100

Designed specifically for Hyundai i20 (2008 - 2015 PB/PBT generation) models, this Brake Master Cylinder (OEM Part Number: 585101J100) is the primary hydraulic pressure-generating component of the braking system. It converts driver foot pressure applied on the brake pedal directly into hydraulic fluid pressure, transferring power to the front and rear calipers and wheel cylinders.

Over time, moisture absorbed by aging brake fluid causes internal seal deterioration and corrosion along the inner cylinder walls, leading to internal pressure bypass. If your vehicle exhibits a spongy pedal, sinking pedal travel, or extended stopping distances, replacing the master cylinder with an OEM-spec replacement restores mandatory hydraulic performance and driving safety.

Why Is the Brake Master Cylinder Essential?

• Direct Hydraulic Power Conversion: Converts pedal mechanical force into instant hydraulic fluid pressure for rapid pad-to-rotor contact.

• Dual-Circuit Safety Standard: Operates split diagonal hydraulic circuits to ensure partial braking capability even if one line suffers a leak.

• Crisp Pedal Response: Eliminates soft or spongy pedal travel, giving the driver immediate, firm braking feel.

• Seamless ABS / ESP Integration: Delivers steady, pulse-free fluid delivery required by ABS and electronic stability control units.

Symptoms of a Failing Brake Master Cylinder

• Sinking or Spongy Brake Pedal: The pedal slowly sinks to the floorboard under continuous foot pressure due to internal fluid bypass.

• Increased Braking Distance: Reduced hydraulic pressure output requiring significantly more effort to stop the vehicle.

• Brake Fluid Leakage: Fluid seeping behind the primary piston seal into the brake booster cavity.

• Pedal Return Lag: Slow or incomplete pedal rebound upon releasing the brakes.

Key Product Features

• 100% OEM Direct Fit (58510-1J100): Guarantees exact fitment for Hyundai i20 (2008 - 2015) 1.2L, 1.4L petrol, and 1.4L CRDi diesel engines.

• High-Grade Aluminum Alloy Body: Lightweight yet ultra-durable casting engineered to withstand extreme hydraulic pressures without flexing.

• EPDM Hydraulic Seals: Heavy-duty internal seals resistant to chemical degradation from standard DOT 3 and DOT 4 brake fluids.

Technical Specifications