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Home >> Volkswagen >> 2021 >> ID.4 Pro S, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Antilock Brake System) >> 45 Antilock Brake System >> Control Module And Hydraulic Unit >> Brake Lines, Attaching To Hydraulic Unit >> Brake Lines, Attaching To Hydraulic Unit
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Brake Lines, Attaching To Hydraulic Unit

WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.

On Tandem Master Brake Cylinder:

Fig 1: Connection Of Brake Lines From Dual Brake Master Cylinder To Hydraulic Unit -- On Tandem Main Brake Cylinder
GWWN45-10002Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

A -  Master Brake Cylinder Primary Piston Circuit to Hydraulic Unit

Identification: 6 mm diameter and pipe fitting with a M12 x 1 thread

B -  Master Brake Cylinder Secondary Piston Circuit to Hydraulic Unit

Identification: 6 mm diameter and pipe fitting with a M12 x 1 thread

1 -  Hydraulic Unit to Left Front Brake Caliper

3 -  Hydraulic Unit to Left Rear Brake Caliper

4 -  Hydraulic Unit to Right Rear Brake Caliper

On the Hydraulic Unit:

Fig 2: Brake Line Tightening Sequence
GWWN45-10263Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1 -  Hydraulic Unit to Right Rear Brake Caliper

Identification: 5.25 mm diameter and tube fitting with a M12 x 1 short thread

2 -  Hydraulic Unit to Left Front Brake Caliper

Identification: 5.25 mm diameter and tube fitting with a M10 x 1 thread

3 -  Hydraulic Unit to Right Front Brake Caliper

Identification: 5.25 mm diameter and tube fitting with a M12 x 1 short thread

4 -  Hydraulic Unit to Left Rear Brake Caliper

Identification: 5.25 mm diameter and tube fitting with a M10 x 1 thread

5 -  Hydraulic Unit to Master Brake Cylinder Secondary Piston Circuit

Identification: 6 mm diameter and pipe fitting with a M12 x 1 thread

6 -  Hydraulic Unit to Master Brake Cylinder Primary Piston Circuit

Identification: 6 mm diameter and pipe fitting with a M12 x 1 thread

Tightening Specification