Brake caliper bleed valve. Porsche 356 / 911  ❭  69535164190

Brake caliper FRONT
Caliper fixing points are 90mm apart.


Porsche 911 1974 - 1983 2.7L / 3.0L SC

These OE match front brake calipers are direct replacement units engineered to replicate the original Porsche “A-Type” calipers fitted to 911 models from 1974 to 1983. Designed for vehicles equipped with 2.7L and 3.0L SC engines, they integrate seamlessly into the factory braking system.

Each caliper is side-specific and sold separately:
  • Left (driver side): 91135142502
  • Right (passenger side): 91135142602

These units are designed for direct bolt-on installation and are compatible with original brake discs and pads, making them ideal for restoration, maintenance, or performance reliability upgrades.

The brake caliper clamps the brake pads against the brake disc when the brake pedal is pressed. This creates friction, slowing the rotation of the wheel and bringing the vehicle to a controlled stop. The fixed design ensures consistent braking performance and even pad wear.

Function
•   Applies braking force to discs via brake pads
•   Distributes pressure evenly across the braking surface
•   Converts hydraulic pressure into mechanical braking force
•   Supports stable, controlled stopping performance
•   Ensures consistent braking response under load

Brake calipers are exposed to heat, moisture, and constant mechanical stress. Over time, seals can degrade, pistons can seize, and corrosion may affect performance. Worn calipers can lead to uneven braking, reduced stopping power, and increased wear on discs and pads. Replacing them restores braking efficiency, safety, and driving confidence.

When to replace
•  Brake caliper sticking or seized piston
•  Uneven brake pad wear
•  Reduced braking performance or pulling to one side
•  Fluid leaks around caliper seals
•  During brake system overhaul or restoration

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Related, superseded, cross reference or alternative numbers for comparison.

91135142

The product you are viewing cross references to these numbers

Front Brake Calipers 

Restore confident braking performance with Front Brake Calipers, designed for Porsche 911 3.2 Carrera models from 1984 to 1989. Positioned at the front axle, these calipers are essential braking components responsible for applying clamping force to the brake discs, helping slow the vehicle safely and consistently.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50

Brake calipers work together with the brake pads, discs and hydraulic braking system. When the brake pedal is pressed, brake fluid pressure forces the caliper pistons to push the pads against the disc, creating friction and reducing vehicle speed. Because the front brakes handle a large proportion of braking force, properly functioning front calipers are critical for safe road use and predictable braking performance.

Over time, calipers can suffer from corrosion, seized pistons, worn seals, fluid leaks and uneven pad movement. Replacing worn or faulty front calipers helps restore braking balance, pedal feel and stopping confidence.

What Do Front Brake Calipers Do?

Front brake calipers convert hydraulic pressure from the braking system into mechanical clamping force. This force presses the brake pads against the rotating brake discs, generating the friction needed to slow or stop the vehicle.

Correctly functioning front calipers help provide:

Strong and consistent braking force Stable pedal feel Balanced front braking performance Even brake pad wear Reliable stopping power Improved safety in everyday and spirited driving

Symptoms of Brake Caliper Wear or Failure

Brake calipers operate in a harsh environment and are exposed to heat, road debris, moisture and brake dust. Over time, internal seals, pistons and sliding surfaces can deteriorate.

Common symptoms of worn or failing front brake calipers include:

Vehicle pulling to one side under braking Uneven brake pad wear Brake fluid leaks around the caliper Spongy or inconsistent brake pedal feel Reduced braking performance Brake drag or sticking brakes Excessive brake dust on one wheel Burning smell after driving Overheating brake disc or wheel Squealing, grinding or rubbing noises Brake warning light caused by fluid loss

If a caliper piston sticks or a seal fails, braking performance can become unpredictable and unsafe.

Why Brake Caliper Replacement Matters

Replacing worn or faulty front brake calipers is essential for restoring safe and predictable braking performance. A failing caliper can cause brake imbalance, overheating, premature pad and disc wear and reduced stopping power.

Replacement helps:

Restore correct braking force Improve pedal feel and response Prevent brake drag and overheating Reduce uneven pad and disc wear Eliminate hydraulic fluid leaks Maintain balanced braking performance Improve safety and driver confidence

For a classic Porsche 911 3.2 Carrera, maintaining the braking system in excellent condition is vital for preserving the driving experience and safety the car was engineered to deliver.

Features & Benefits

• Restores reliable braking performance
• Supports strong and consistent stopping power
• Helps maintain correct brake pedal feel
• Ideal for maintenance, repair and restoration projects
• Direct replacement for worn or damaged original calipers

 Keep your Porsche 911 3.2 Carrera braking system performing safely and consistently with front brake calipers from Design911

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

91135142

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Brake caliper REAR. 
These are direct replacement calipers for the rear left (part number 91135242500) or rear right (part number 91135242600) side of a mid-1980s Porsche 911. They are manufactured to the dimensions, fitment, and technical specifications of the original. Replacing these calipers restores the correct brake pressure, pad alignment, and brake disc-to-rear wheel contact, restoring braking balance and safety.


Porsche 911 1984 - 1989

Brake calipers are crucial for safe, controlled stopping. Over time, calipers can suffer from corrosion, seized or sticking pistons, worn seals, fluid leakage or uneven pad wear. Especially on aging cars, the rear calipers may lose proper clamping force, causing longer stopping distances, uneven braking, noise or poor pad life.

Replace these calipers when you notice:
• Brake fluid leakage around the caliper body or piston area
• Uneven or rapid pad wear on the rear wheel
• Reduced braking performance, dragging wheel or vibration
• Maintenance/restore of the braking system during a rebuild

Installing a correct-fit caliper restores proper braking clamp, pad and rotor alignment and ensures your classic Porsche retains its intended braking performance and safety.

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

91135242

The product you are viewing cross references to these numbers