ID.4 2021 ➤
Brake system - Edition 07.2021
3
Hydraulic system
3.1
General notes on brake fluid
3.1.1
3.1.2
General notes on brake fluid
Changing brake fluid
⇒ Maintenance; Booklet ; Brake and clutch system: Changing
brake fluid
3.2
Bleeding hydraulic system following
standard procedure
Special tools and workshop equipment required
♦ Socket -VAS 6564-
♦ brake filling and bleeding equipment -VAS 6860-
Important
•
A pre-pressure of 2 bar is required on the brake filling and
bleeding equipment -VAS 6860- to bleed ABS hydraulic unit
-N55- .
– Connect brake filling and bleeding equipment -VAS 6860- to
brake fluid reservoir.
– Open bleeder screws in the specified order and bleed brake
calipers and wheel brake cylinders:
1 - Front right brake caliper
2 - Front left brake caliper
3 - Rear right wheel brake cylinder
4 - Rear right wheel brake cylinder
Important
•
The bleeder hose must sit tightly on the bleeder screw so
that no air can enter the brake system.
– Leave bleeder screw of a brake caliper/wheel brake cylinder
open with bleeder breather hose still fitted until brake fluid
discharges free of air bubbles.
Tightening torques
Specified torques for bleeder screws:
♦ ⇒ Rep. gr. 46; Assembly overview – front brake
♦ ⇒ Rep. gr. 46; Assembly overview – brake shoes
3.3
Subsequent bleeding of hydraulic sys‐
tem
Special tools and workshop equipment required
♦ Socket -VAS 6564-
♦ brake filling and bleeding equipment -VAS 6860-
Important
3. Hydraulic system
81
2024 VW ID.4 Owner's Manual
