Compensating Line Brake Caliper (S-Caliper), Front. Porsche 911 / 912 1969-77  ❭  90135199

Compensating Line Brake Caliper (S-Caliper), Front.
The Porsche Front Brake Caliper Compensating Line (S-Caliper) is a genuine brake hydraulic component designed to connect the hydraulic chambers within Porsche S-type front brake calipers. Engineered to Porsche's exact specifications for fit, pressure resistance and reliability, this compensating line ensures even brake fluid distribution throughout the caliper assembly, enabling consistent braking performance and balanced brake pad application.  

Fits:

• Porsche 911 1969 2.0L / 912 SWB (F)
• Porsche 911 1968-1971 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1975-1977 3.0L Turbo (930)  

Diagram Ref No 18

Manufactured from high-quality corrosion-resistant metal tubing, the compensating line is designed to withstand the high hydraulic pressures, temperature fluctuations and demanding operating conditions experienced within the braking system. Precision-formed to match the original factory design, it provides secure, leak-free fluid transfer between caliper sections.  

What This Product Does:

• Transfers brake fluid between brake caliper hydraulic chambers.
• Ensures balanced hydraulic pressure throughout the caliper assembly.
• Supports even brake pad application across the brake disc.
• Maintains consistent braking performance.
• Helps optimise braking efficiency and control.
• Provides reliable hydraulic fluid circulation within the caliper.
• Supports safe and predictable braking operation.
• Forms an essential part of the front brake hydraulic system.

Symptoms Of Wear Or Failure:

• Brake fluid leaks around the caliper assembly.
• Reduced braking performance.
• Soft or spongy brake pedal feel.
• Uneven brake pad wear.
• Inconsistent braking response.
• Loss of hydraulic pressure.
• Visible corrosion or damage to the brake line.
• Brake warning light illumination due to fluid loss.
• Fluid contamination around the caliper.
• Reduced braking confidence and control.

Why Replacement Matters: 

• Brake compensating lines operate under extremely high hydraulic pressures and are continually exposed to moisture, road contaminants, heat cycles and environmental corrosion. Over time, corrosion, physical damage or fatigue can compromise the integrity of the line and increase the risk of fluid leakage.
• A damaged compensating line can reduce hydraulic pressure within the brake caliper, resulting in diminished braking performance, uneven brake operation and increased stopping distances. Because the braking system is a critical vehicle safety system, any hydraulic leak or loss of pressure should be addressed immediately.
• Replacing a worn or damaged compensating line restores proper hydraulic fluid transfer and ensures the brake caliper functions as intended. A genuine Porsche replacement provides factory-correct fitment, dependable sealing and long-term durability, helping maintain the braking performance, safety and driving confidence expected from your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90135199

The product you are viewing cross references to these numbers