Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Caliper Seals |Pistons
By OE Match
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits FRONT 38mm piston


Porsche 911 (930) Turbo 1978-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 37
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035154700
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)


Porsche 911 (930) Turbo 1978-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 42.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035255400
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Restore safe and dependable braking performance with this OE Match Replacement Brake Caliper Piston, measuring 30mm diameter, manufactured as a direct replacement. Produced to OE-style specifications, this precision-machined caliper piston is designed to replace worn, corroded, or seized original pistons during brake caliper overhaul and restoration.
Fits:
- Porsche 911 1978-1989 3.3L Turbo (930)
Diagram Ref No 41
The brake caliper piston converts hydraulic brake pressure into mechanical force, pushing the brake pads evenly against the brake disc to provide smooth, controlled braking. Over time, corrosion, contaminated brake fluid, damaged seals, or general wear can cause the piston to stick or seize, leading to reduced braking efficiency, uneven pad wear, and brake drag. This OE Match replacement restores correct caliper function and reliable braking performance, making it ideal for professional brake caliper refurbishment and classic Porsche restoration projects.
What This Product Does:
- Converts hydraulic brake pressure into braking force.
- Applies even pressure to the brake pads.
- Restores smooth brake caliper operation.
- Helps maintain consistent braking performance.
- Reduces uneven brake pad wear.
- Provides OE-style fit and dimensional accuracy.
- Replaces worn, corroded, or seized original pistons.
Symptoms Of Wear Or Failure:
- Seized or sticking brake caliper.
- Uneven brake pad wear.
- Brake pulling to one side.
- Reduced braking performance.
- Brake drag after releasing the brake pedal.
- Corrosion or pitting on the piston surface.
- Brake fluid leaks caused by damaged piston surfaces.
- Overheating brake discs or brake pads.
- Difficulty retracting the piston during servicing.
- Age-related deterioration found during brake caliper rebuilds.
Why Replacement Matters:
- The brake caliper piston is a critical component of the hydraulic braking system and plays a vital role in maintaining safe, consistent stopping performance. A worn, corroded, or seized piston can reduce braking efficiency, increase brake component wear, and compromise vehicle safety.
- Replacing a damaged piston restores smooth hydraulic movement, even brake pad contact, and dependable braking performance. Manufactured to OE-style specifications, this OE Match replacement provides the correct fit, reliable operation, and long-lasting durability, making it an essential component for professional brake caliper refurbishment and preserving your Porsche's braking system to factory standards.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035255501
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Restore safe and reliable braking performance with this OE Match Replacement Brake Caliper Piston, measuring 38mm diameter x 29mm height, manufactured as a direct replacement. Produced to OE-style specifications, this precision-engineered caliper piston is designed to replace worn, corroded, or damaged original pistons during brake caliper overhaul and restoration.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
The brake caliper piston converts hydraulic brake pressure into mechanical force, pressing the brake pads evenly against the brake disc to slow and stop the vehicle. Over time, exposure to moisture, contaminated brake fluid, corrosion, or damaged piston seals can cause the piston to seize or operate unevenly, affecting braking performance and causing uneven pad wear. This OE Match replacement restores smooth caliper operation, making it ideal for professional brake rebuilds and classic Porsche restoration projects.
What This Product Does:
- Converts hydraulic pressure into braking force.
- Pushes the brake pads evenly against the brake disc.
- Restores smooth brake caliper operation.
- Helps maintain consistent braking performance.
- Reduces uneven brake pad wear.
- Provides OE-style fit and dimensional accuracy.
- Replaces worn, corroded, or seized original pistons.
Symptoms Of Wear Or Failure:
- Seized or sticking brake caliper.
- Uneven brake pad wear.
- Brake pulling to one side.
- Reduced braking performance.
- Brake drag after releasing the pedal.
- Corrosion or pitting on the piston surface.
- Fluid leaks caused by damaged piston surfaces.
- Overheating brake disc or pads.
- Difficulty retracting the piston during servicing.
- Age-related deterioration discovered during caliper overhaul.
Why Replacement Matters:
- The brake caliper piston is a critical component in the hydraulic braking system. A corroded, worn, or seized piston can reduce braking efficiency, cause uneven braking, increase brake wear, and compromise vehicle safety.
- Replacing a damaged piston restores smooth hydraulic operation, even brake pad contact, and dependable stopping performance. Manufactured to OE-style specifications, this OE Match replacement provides the correct dimensions, precise fit, and reliable durability, making it an essential component for professional brake caliper refurbishment and classic Porsche restoration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135299300
The product you are viewing cross references to these numbers
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
SIZE 38mm diameter x 33mm height
Porsche OE numbers 93035155104
Please check your caliper pistons size before ordering, this list below is just a guide
Porsche 930 Front
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93035155104
The product you are viewing cross references to these numbers
Brake Caliper Replacement Pistons for Brembo Calipers
Sold each
Restore the performance and reliability of your Porsche Brembo braking system with these OE Match Brake Caliper Replacement Pistons. Manufactured to original equipment specifications, these precision-engineered pistons are designed for rebuilding Brembo brake calipers fitted to a wide range of Porsche models.
Available in 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm and 44mm outer diameters, every piston has an overall height of 32mm and is manufactured to deliver the correct fit, smooth operation and dependable sealing performance when used with new piston seals and dust boots.
Important: Please check the piston diameter required for your specific caliper before ordering. Many Brembo calipers use two different piston diameters within the same caliper to optimise braking performance. The sizes listed refer to the outer diameter (OD) of the piston.
What Does a Brake Caliper Piston Do?
The brake caliper piston is one of the most important components inside the braking system. Hydraulic brake fluid pressure pushes the piston forward, forcing the brake pad firmly against the brake disc to generate the friction required to slow or stop the vehicle.
Its primary functions include:
- Converting hydraulic pressure into braking force.
- Applying even pressure across the brake pads.
- Ensuring smooth and consistent piston movement.
- Maintaining balanced braking performance.
- Supporting Porsche ABS and stability control systems.
- Delivering precise pedal feel and braking response.
Correctly functioning pistons are essential for maintaining the powerful, progressive braking performance expected from Porsche Brembo calipers.
Why Do Brake Caliper Pistons Fail?
Brake caliper pistons operate in harsh conditions and are continually exposed to heat, moisture and brake dust. Over time they can become damaged or worn.
Common causes include:
- Corrosion caused by moisture ingress.
- Torn or damaged dust boots.
- Contaminated brake fluid.
- Surface pitting.
- Heat generated during heavy braking.
- Seized pistons caused by corrosion.
- Damage during previous repairs.
- High mileage and normal wear.
A damaged piston can prevent the caliper from operating correctly, leading to reduced braking performance and uneven brake pad wear.
Symptoms of a Worn or Damaged Caliper Piston
Common symptoms include:
- Sticking or seized brake calipers.
- Uneven brake pad wear.
- Vehicle pulling during braking.
- Reduced braking performance.
- Overheating brakes. Brake drag.
- Fluid leaks around the piston seal.
- Difficulty retracting the piston during servicing.
Replacing damaged pistons during a caliper overhaul restores smooth operation and reliable braking performance.
When Should Brake Caliper Pistons Be Replaced?
Replacement is recommended whenever:
- Corrosion or pitting is visible.
- Pistons become seized or difficult to move.
- The caliper is being rebuilt.
- Dust boots have failed allowing contamination.
- Brake fluid leaks occur around the piston.
- Uneven pad wear is caused by sticking pistons.
- Restoring older Brembo brake calipers.
- During preventative maintenance on ageing braking systems.
For the best results, new pistons should always be installed with new piston seals and dust protection boots.
OE Match Quality You Can Trust
These OE Match Brake Caliper Replacement Pistons offer:
- Manufactured to original equipment specifications.
- Precision-machined finish.
- Excellent corrosion resistance.
- Smooth piston movement.
- Direct replacement fitment.
- Suitable for Brembo brake calipers.
- Available in 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm and 44mm diameters.
- Uniform piston height of 32mm.
- Ideal for professional caliper rebuilding.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1055955
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Rebuilds one front caliper
Includes:
4x 93035154700 Brake caliper piston scraper rings (Boot)
4x 93035155501 Brake caliper piston sealing rings

Porsche 911 (930) Turbo 1978-89
Diagram ref no 37 and 38.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PO-930FBCKIT
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Rebuilds one rear caliper
Includes:
4x 93035255400 Brake caliper piston scraper rings (Boot)
4x 93035255302 Brake caliper piston sealing rings

Porsche 911 (930) Turbo 1978-89
Diagram ref no 42 and 43.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PO-930RBCKIT
The product you are viewing cross references to these numbers
-
disc brake front axle 911 TURBO 1978-83 602-05
-
disc brake rear axle 911 TURBO 1978-83 603-05
-
brake front axle 911 TURBO / CARRERA M491 1987-89 602-05
-
brake rear axle 911 TURBO / CARRERA M491 1987-89 603-05
-
Brake front axle 911 TURBO / CARRERA M491 1984-86 602-05
-
disc brake rear axle 911 TURBO / CARRERA M491 1984-86 603-05
OEMatch Caliper Seals |Pistons — Stopping Power, Consistent Control
OEMatch caliper seals and pistons for Porsche models restore hydraulic integrity and consistent brake response. These restoration and repair components are practical alternatives when genuine or OEM parts are unavailable, offering direct-fit replacements engineered to match original-spec dimensions and tolerances. OEMatch maintains extensive cross-references to support model-specific servicing.
Available Types
- Seal kits — piston seals and dust boots
- Replacement pistons — steel and phenolic options
- Rebuild kits including seals, pistons and associated fittings
Understanding OEMatch Caliper Seals |Pistons
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche's original caliper seals and pistons. OE (Original Equipment) refers to parts matching original specifications for the caliper seals and pistons and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM caliper seals and pistons engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Caliper pistons convert hydraulic pressure into pad clamping force while seals retain fluid and exclude contamination. Correct materials, surface finish and seal geometry reduce the risk of corrosion, piston scoring and sticking. Components listed here are chosen to address common Porsche service needs and to support caliper rebuilds across different models.
Benefits Include
- Restores hydraulic integrity to prevent leaks and maintain consistent pedal feel
- Improves caliper response and even pad wear
- Reduces corrosion and fluid-related deterioration
- Supports reliable retraction and balanced braking across wheels
Why Caliper Seals |Pistons Wear and Fail
- Aging and brake fluid degradation that harden or swell seals
- Corrosion and pitting on pistons from moisture ingress
- Heat damage from sustained or aggressive braking
- Contamination or debris causing seal abrasion and piston scoring
The Importance of Replacing with OEMatch Caliper Seals |Pistons
Worn seals and pistons compromise braking performance and can lead to leaks, uneven braking or sticking calipers. Replacing these parts restores consistent system pressure, pedal feel and safety-critical function; selecting components matched to Porsche specifications helps maintain correct clearances and long-term reliability without altering system behaviour.
Advantages
- High-quality materials chosen for corrosion and fluid resistance
- Made to original-spec dimensions and tolerances for Porsche models
- Suitable for restorations, routine servicing and caliper rebuilds
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and replace fasteners where specified. If you lack the correct tools or are unsure about hidden sensors or required recalibration, seek professional installation.