Brake Caliper Piston, Removing And Installing, Single-Piston Brake: Installing

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Install the entire repair kit.
Only use mineral spirits to clean the brakes.
When a brake caliper piston or a piston cylinder are damaged, the brake caliper must be replaced.

-- Insert the seal into the brake caliper.

-- Place the protective cap -2- with outer sealing lip on the brake caliper piston -1-.

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-- Insert the inner sealing lip in the cylinder groove using the Trim Removal Wedge:3409 -item A- at the same time hold the brake caliper piston in front of the brake caliper.

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-- Press the brake caliper piston in the brake caliper using the Piston Resetting Tool:T10145 -item A- do not tilt it while doing so.

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Outer sealing lip of protective cap will then engage in the brake caliper piston groove.