Brake caliper seal repair kit, REAR. Porsche 911 1974-83  ❭  91135299800

Brake caliper seal repair kit, REAR.
OE Match rear brake caliper seal repair kit designed to service the rear brake calipers on classic Porsche 911 (1974–1983) models. Now you can restore your brake calipers performance with our Rebuild Kits. Each kits includes the necessary seals and dust covers that you will need for the rebuild process.
Sold per caliper.


Porsche 911 1974 - 1983

The brake caliper seal kit replaces the internal piston seals, dust boots, and associated rubber components within the rear brake caliper. These seals perform essential functions:
•  Maintain brake fluid integrity inside the caliper piston bore
•  Prevent fluid leakage under hydraulic pressure
•  Protect internal components from dirt, moisture, and debris
•  Enable smooth piston movement for consistent brake pad engagement
•  Help ensure even pad wear and reliable stopping performance.

Over time, original caliper seals harden, crack, or lose elasticity, which can lead to leaking, sticking pistons, uneven braking, and reduced safety.

Function
•  Hydraulic sealing: Ensures brake fluid stays within the caliper bore
•  Piston movement control: Allows smooth, controlled piston travel
•  Dust and dirt exclusion: Prevents contaminants from entering the caliper bore
•  Brake performance preservation: Helps maintain even pad engagement and return.

A properly rebuilt caliper with new seals helps restore brake responsiveness and reduces the risk of brake drag or uneven braking at the rear wheels.

Brake caliper seals are critical for hydraulic braking performance and safety. Old seals often suffer from: • Hardening and cracking due to heat and age • Swelling or deformation from fluid contamination • Loss of elasticity, causing piston bind or leak paths • Corrosion of caliper bores when moisture enters through failed dust boots Worn or leaking seals result in reduced brake performance, fluid leakage, uneven pad wear, brake drag, and compromised stopping power. Replacing them with an OE Match seal kit restores proper fluid retention and piston mobility - increasing safety, consistency, and brake system longevity. When to replace. Install this rear brake caliper seal kit when: • Calipers are leaking fluid around the piston area • Brake pistons stick or bind, causing brake drag • You are performing a full caliper overhaul • Pads and rotors are replaced and calipers are difficult to service • Dust boots are torn, brittle, or missing. A seal kit is a core part of brake caliper rebuilds and should be considered whenever the caliper is disassembled.

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91135299800

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