Brake caliper piston scraper ring. Porsche 911 Turbo 78-89  ›  93035154700

Brake Caliper Piston Scraper Ring

The OE Match Brake Caliper Piston Scraper Ring is a replacement dust protection component for the front brake calipers fitted to Porsche 911 Turbo (930) 3.3L models manufactured between 1978 and 1989.


Fits:

• Porsche 911 1978-1989 3.3L Turbo (930)   

Diagram ref no 37     

Designed for front brake calipers with 38mm pistons, this scraper ring helps protect the piston and surrounding sealing area from brake dust, dirt, moisture and road contamination.

A damaged or deteriorated scraper ring can allow contaminants to accumulate around the brake piston, increasing the risk of corrosion, sticking pistons and reduced braking performance.

What Does the Brake Caliper Piston Scraper Ring Do?

The scraper ring forms a protective barrier around the brake caliper piston, helping prevent dirt, moisture and brake dust from entering the area between the piston and caliper body.

As the piston moves during braking, the scraper ring helps keep its exposed surface protected from contamination.

This is particularly important on high-performance braking systems such as those fitted to the Porsche 911 Turbo, where brake components are exposed to considerable heat and demanding operating conditions.

The scraper ring is separate from the internal hydraulic piston seal, which is responsible for retaining brake fluid pressure.

Why Does It Fail?

Brake caliper piston scraper rings are exposed to high temperatures, road debris and repeated piston movement.

Common causes of deterioration include:

Age-related hardening or cracking Heat damage from prolonged or heavy braking Contamination from road dirt and brake dust Moisture and corrosion around the piston Damage during brake pad replacement Incorrect installation or previous caliper repairs General wear after years of service

Once damaged, the scraper ring may no longer provide effective protection against contamination.

When Should It Be Replaced?

Replacement is recommended whenever the scraper ring becomes cracked, torn, hardened, loose or otherwise damaged.

Common signs that inspection or replacement may be necessary include:

Visible deterioration around the brake piston Corrosion developing on the piston surface Sticking or difficult-to-retract brake pistons Uneven brake pad wear Brake drag or overheating Contamination around the piston and caliper bore

The scraper rings should also be inspected during brake caliper refurbishment, piston replacement or a complete braking system restoration.

Related Brake Caliper Components

For a complete front brake caliper overhaul, the following components may also require replacement:

Front brake caliper piston sealing ring – 93035155501 Front brake caliper scraper ring – 93035154700 Front brake caliper seal repair kit – PO-930FBCKIT

The front caliper repair kit contains four scraper rings and four hydraulic piston sealing rings, sufficient to rebuild one front caliper.

Installation Notes

Inspect the brake caliper piston for corrosion, scoring or other damage before fitting the replacement scraper ring.

A new scraper ring will not correct problems caused by a damaged piston or defective hydraulic seal.

Ensure all components are correctly seated and installed using the appropriate Porsche brake caliper servicing procedure.

Brake caliper repairs should be carried out by a suitably qualified technician, with the braking system thoroughly checked before the vehicle is returned to service.

Porsche 911 Turbo 930 Brake Caliper Scraper Rings, Piston Seals & Repair Parts

The front brake calipers fitted to Porsche 911 Turbo 930 models rely on correctly functioning pistons, hydraulic seals and protective scraper rings to maintain reliable braking performance.

Over time, exposure to heat, moisture and road contamination can cause the original scraper rings to deteriorate, allowing dirt to reach the brake piston surface and potentially contribute to corrosion or restricted piston movement.

OE Match brake caliper piston scraper ring  provides a replacement solution for Porsche 911 Turbo 3.3L models manufactured between 1978 and 1989, front calipers with 38mm pistons.

Replacing damaged scraper rings during routine brake maintenance or caliper refurbishment helps protect internal components and supports long-term braking system reliability.

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

93035154700

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