Table of Contents > Brake system: changing brake fluid

VW ID.4 Maintenance ➜ Brake system: changing brake fluid

ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
Part number  
ID.4  
-11A 010 000 Q-  
Half payload  
kPa/bar/psi  
Half load, comfort  
kPa/bar/psi  
Full payload  
kPa/bar/psi  
Tyre size  
235/55 R19  
255/50 R19  
235/50 R20  
255/45 R20  
Front  
Rear  
Front  
Rear  
Front  
Rear  
250/2.5/36  
---  
---  
---  
---  
---  
---  
---  
---  
---  
270/2.7/39  
---  
---  
250/2.5/36  
---  
270/2.7/39  
---  
270/2.7/39  
---  
270/2.7/39  
---  
310/3.1/45  
---  
310/3.1/45  
Part number  
ID.4  
-11A 010 000 M-  
Half payload  
kPa/bar/psi  
Half load, comfort  
kPa/bar/psi  
Full payload  
kPa/bar/psi  
Tyre size  
235/55 R19  
255/50 R19  
235/50 R20  
255/45 R20  
Front  
Rear  
Front  
Rear  
Front  
Rear  
270/2.7/39  
---  
---  
---  
---  
---  
---  
---  
---  
---  
310/3.1/45  
---  
---  
270/2.7/39  
---  
270/2.7/39  
---  
270/2.7/39  
---  
310/3.1/45  
---  
320/3.2/46  
---  
320/3.2/46  
Part number -11A 010 000 L-  
ID.4  
Half payload  
kPa/bar/psi  
Half load, comfort  
kPa/bar/psi  
Full payload  
kPa/bar/psi  
Tyre size  
235/45 R21  
255/40 R21  
Front  
Rear  
Front  
Rear  
Front  
Rear  
270/2.7/39  
---  
---  
---  
---  
---  
---  
280/2.8/41  
---  
---  
270/2.7/39  
310/3.1/45  
4.9  
Brake system: changing brake fluid  
Special tools and workshop equipment required  
♦ Torque wrench  
♦ Brake filling and bleeding equipment -VAS 6860-  
32  
4. Descriptions of work  
ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
♦ Insert tool -VAS 6564/9-  
♦ Tool set for brake bleeding -VAS 6564-  
CAUTION  
Risk of skin injury from corrosive brake fluid.  
Risk of irritation and injury to skin.  
– Avoid contact with the skin.  
NOTICE  
Risk of damage to vehicle from corrosive brake fluid.  
Possible damage to paintwork and vehicle.  
– Avoid contact with components and paintwork and if nec‐  
essary rinse off any spilt brake fluid with water.  
NOTICE  
Risk of damage to brake system if brake fluid is used incor‐  
rectly.  
Mineral oils damage plugs and sleeves of the brake system.  
– Do not mix fluids containing mineral oil (oil, petrol, cleaning  
solution) with brake fluid.  
NOTICE  
Brake fluid is hygroscopic, which means it absorbs moisture  
from the ambient air.  
If the water content in the brake fluid is too high, the brake  
system could fail, and it promotes corrosion within the brake  
system.  
– Store brake fluid in air tight containers.  
4. Descriptions of work  
33  
ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
Extracting brake fluid  
– Unscrew cap -1- from brake fluid reservoir.  
– Using the suction hose from brake filling and bleeding unit,  
extract as much brake fluid -2- from the brake fluid reservoir  
as possible through the strainer -1-.  
Note  
The strainer in brake fluid reservoir must remain in place.  
Ensure that no brake fluid runs through the strainer after  
completing the extraction (the brake fluid level in the reser‐  
voir must be even with the lower edge of the strainer).  
Connecting brake filling and bleeding equipment  
– Screw adapter onto brake fluid reservoir.  
– Connect filler hose from brake filling and bleeding equipment  
to adapter.  
– Set correct pressure on brake filling and bleeding equipment  
⇒ Operating Manual, and switch on brake filling and bleed‐  
ing equipment.  
34  
4. Descriptions of work  
ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
Note  
The bleeder hose must be firmly seated on bleeder valve so  
that no air can enter the brake system.  
There must always be sufficient brake fluid in the brake res‐  
ervoir so that no air can enter the brake system through the  
reservoir.  
Start with front right brake caliper on RHD vehicles.  
Due to the tool attachment -VAS 6564/9- the rear wheels do  
not need to be removed any more.  
Front axle  
– Remove cap -1- from bleeder valve of front left brake caliper.  
– Push collector bottle bleeder hose onto front left bleeder  
valve.  
– Open bleeder screw, and let appropriate quantity of brake  
fluid run out ⇒ page 36 .  
– Close bleeder screw. Torque: ⇒ Brake system; Rep. gr. 47;  
Front brake caliper; Assembly overview - front brake caliper.  
– Fit cap back onto bleeder valve on brake caliper.  
– Repeat procedure on front right.  
Rear axle  
– Remove cover cap -1- from bleeder valve of rear left wheel  
brake cylinder.  
– Push collector bottle bleeder hose onto rear left bleeder  
valve.  
– Open bleeder valve and let appropriate quantity of brake  
fluid run out (see table). .  
4. Descriptions of work  
35  
ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
– Close bleeder screw. Torque: ⇒ Brake system; Rep. gr. 46;  
Rear brake; Assembly overview - rear brake  
– Fit again cover cap on bleeder valve of rear left brake cylin‐  
der.  
– Repeat procedure on rear right of vehicle.  
– Switch off brake filling and bleeding unit.  
– Take filler hose off adapter.  
– Unscrew adapter from brake fluid reservoir.  
– Check brake fluid level and adjust level if necessary. It must  
be between position -1- and -2-.  
– Screw on cap -1- of brake fluid reservoir.  
– Check function during road test.  
Table - Sequence and quantity of brake fluid  
Sequence  
Brake fluid quantity  
bleeder valves:  
which must flow out of bleeder valves:  
Brake caliper  
Front left  
Front right  
0.20 l  
0.20 l  
Wheel brake cylinder  
Rear left  
Rear right  
0.30 l  
0.30 l  
Total quantity for automatic gearbox including  
the quantity extracted from the brake fluid res‐  
ervoir  
approx. 1.00 l  
36  
4. Descriptions of work  
ID.4 2021 ➤, ID.5 2021 ➤  
Maintenance - Edition 11.2021  
4.10  
Brake system and shock absorbers: in‐  
specting for leaks and damage  
Check following components for leaks and damage:  
♦ Brake master cylinder  
♦ Brake servo (for anti-lock brake system: hydraulic unit)  
♦ Brake pressure regulator and  
♦ Brake caliper  
♦ Shock absorbers (during inspection only)  
♦ Presence of dust caps on brake fluid bleeder screws  
♦ Presence of caps on guide bushes  
– Ensure that brake hoses are not twisted.  
– Additionally ensure that brake hoses do not touch any vehi‐  
cle components when steering is at full lock.  
– Check brake hoses for abrasion, porosity and brittleness.  
– Check brake lines for corrosion.  
– Check brake connections and fastenings for correct seating,  
leaks and corrosion.  
– Check brake lines and brake hoses for correct seating and  
attachment in retainers.  
Note  
Faults found must always be rectified (repair measure).  
4.11  
Brake fluid level: checking  
CAUTION  
Risk of skin injury from corrosive brake fluid.  
Risk of irritation and injury to skin.  
– Avoid contact with the skin.  
NOTICE  
Risk of damage to vehicle from corrosive brake fluid.  
Possible damage to paintwork and vehicle.  
– Avoid contact with components and paintwork and if nec‐  
essary rinse off any spilt brake fluid with water.  
NOTICE  
Risk of damage to brake system if brake fluid is used incor‐  
rectly.  
Mineral oils damage plugs and sleeves of the brake system.  
– Do not mix fluids containing mineral oil (oil, petrol, cleaning  
solution) with brake fluid.  
4. Descriptions of work  
37  

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