Brake line connections at the hydraulic unit, ABS 5.0

Valid for following vehicles:

Front Wheel Drive (FWD) with ABS/EDL

Front Wheel Drive (FWD) with ABS/EDL/ASR

All Wheel Drive (AWD) with ABS/EDL

The following list pertains to Fig 1 .

Hydraulic unit - Master brake cylinder (primary piston circuit)
Hydraulic control unit - right rear brake caliper
Hydraulic unit - left front brake caliper
Hydraulic unit - Master brake cylinder (secondary piston circuit)
Hydraulic control unit - left rear brake caliper
Hydraulic control unit - right front brake caliper

NOTE: For vehicles with All Wheel Drive (AWD) and EDL intake control (from 05.95), pressure absorbers are omitted. See BRAKE LINE CONNECTIONS AT THE HYDRAULIC UNIT, ABS 5.0 . EDL intake regulation reduces regulation noise.

The functional range of the pressure relief valve in the hydraulic unit is raised from 90 +²⁵ bar to 170 +²⁵ bar.

Fig 1: Identifying Brake Line Connections On Hydraulic Unit - Bosch 5.0

Courtesy of AUDI OF AMERICA, INC.

NOTE: For vehicles with All Wheel Drive (AWD) and ABS/EDL-pressure regulation (up to 05.95):

For vehicles with All Wheel Drive (AWD) and EDL-pressure regulation, two pressure absorbers are screwed into the hydraulic unit (arrows).

They moderate pressure spikes in the brake lines and reduce regulation noise.

Counterhold on hex-edge of pressure absorber when releasing brake lines.

The following list pertains to Fig 1 .

Hydraulic unit - Master brake cylinder (primary piston circuit)
Hydraulic control unit - right rear brake caliper
Hydraulic unit - left front brake caliper
Hydraulic unit - Master brake cylinder (secondary piston circuit)
Hydraulic control unit - left rear brake caliper
Hydraulic control unit - right front brake caliper

Fig 1: Identifying Brake Line Connections On Hydraulic Unit - Bosch 5.0

Courtesy of AUDI OF AMERICA, INC.

NOTE: The functional range of the pressure relief valve in the hydraulic unit is 90 +²⁵ bar.