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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Mechanical Components (Brake System) (2 Of 2) >> 46 Mechanical Components >> Front Brakes >> Brake Caliper, Replacing >> Brake Caliper, Replacing, 1LJ, 1LL, 1ZA And 1ZC >> Installing

Brake Caliper, Replacing, 1LJ, 1LL, 1ZA And 1ZC: Installing

Install in reverse order of removal and note the following:

NOTE:

Clean bolts before reusing.

Replace damaged bolts.

Always replace self-locking bolts.

Coat the brake pad guides in the brake caliper with Lithium Grease :G 052 150 A2  .

Do not lubricate the seals for brake pistons and rubber components.

-- Install the brake pads.

GWWA46-10480Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -2-.

Vehicle with brake hose with union bolt:

GWWA46-10482Courtesy of AUDI OF AMERICA, LLC

-- Bring the brake hose into the installation position and tighten the union bolt -arrow-.

CAUTION:

There is a risk of damaging the brake hose.

  • Do not let the brake caliper hang on the brake hose. Do not support the weight with the brake hose.
  • Replace the brake hose if damaged.
  • Do not bend the brake line.
  • A damaged brake line must be replaced.
  • The brakes must not be applied when the brake caliper is removed.
  • Otherwise, the brake pistons will be damaged.

Vehicle with brake hose without union bolt:

GWWA46-10258Courtesy of AUDI OF AMERICA, LLC

-- Insert the brake hose by hand and insert into the brake caliper.

-- Tighten the brake hose -1-.

-- Check the spring -3- for damage and if required replace.

-- Insert the brake hose into the bracket and connect it to the brake line by tightening the union bolt -2-.

GWWA46-10258Courtesy of AUDI OF AMERICA, LLC

Continuation for All Vehicles:

-- Bring the connector -5- into its installed position and turn in the direction of the -arrow- until the tab -2- engages in the opening -1- on the bracket.

GWWA46-10481Courtesy of AUDI OF AMERICA, LLC

-- Connect the connector -4-.

NOTE:

Make sure that the wire is routed correctly.

Make sure the wire is not blocked, bent, or rubbing against the vehicle.

NOTE:

-- Remove the :VAG1869/2  .

-- Only bleed the brakes on the wheel from which the brake caliper and the brake hose was loosened.

NOTE:

If the brake pedal still feels "soft", completely bleed the brakes.

-- Check brake fluid level, and fill if necessary.

WARNING:

Risk of accident!

  • With the vehicle stationary, firmly press the brake pedal several times so that the brake pads in the operating condition properly sit in their respective position.
  • Make sure the brakes are working correctly before driving the vehicle for the first time.