Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Air suspension warning - Air hoses chaffing on rear subframe - Leaking
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2054643/1
EH
Approval

Event memory entries
Diagnostic address

Event memory entry

0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control
0074 - Chassis Control

C114707: Pneumatic spring / air line front left mechanical malfunction
C114707: Pneumatic spring / air line front left mechanical malfunction
C114807: Pneumatic spring / air line front right mechanical malfunction
C114807: Pneumatic spring / air line front right mechanical malfunction
C11E2F1: Front axle ride-height control system extremely low level detected
C11E2F1: Front axle ride-height control system extremely low level detected
C11AFF0: Level control pressure accumulator Leak detected
C11AFF0: Level control pressure accumulator Leak detected

Fault type Fault status
Intermittent
static
Intermittent
static
Intermittent
static
Intermittent
static

New customer code
Object of complaint

Complaint type

running gear -> shock absorber/suspension control -> self-levelling suspension
running gear -> shock absorber/suspension control -> self-levelling suspension
information, navigation, communication, entertainment -> symbolic warning indicators -> activewarning indicator
information, navigation, communication, entertainment -> symbolic fault indicators -> shock
absorber control system fault indicator
running gear -> shock absorber/suspension control -> automatic shock absorber adjustment

Position

functionality -> without function /
defect
functionality -> defective function
sequence
functionality -> does not activate
functionality -> activates
functionality -> defective function
sequence

New workshop code
Object of complaint
running gear -> adaptive suspension, pitch and roll compensation -> pressure line for air spring strut

Vehicle data
Bentayga
Sales types
Type MY Brand Designation Engine code Gearbox code Final drive code
4V1* 2017 E
4V1* 2018 E

*
*

*
*

*
*

Chassis numbers
Manufacturer Filler Type Filler MY Factory From To
Prod from Prod to
SJA
*
*
*
*
*
000001 019680

Documents
Document name
master.xml

Complaint type Position
leaks -> leaking > not specified <

Technical product information
Air suspension warning - Air hoses chaffing on rear subframe - Leaking

Transaction No.: 2054643/1

Customer statement / workshop findings
A warning regarding the air suspension system is shown within the instrument cluster, at least one of the following event entries is logged within the
Chassis control unit (diagnosis address 0074):
•

C114707: Front left air spring/air hose, mechanical fault

•

C114807: Front right air spring/air hose, mechanical fault

•

C11E2F1: Self-levelling suspension of front axle, extremely low level detected

•

C11AFF0: Pressure accumulator of self-levelling suspension, leak detected

Technical background
The air hose cluster which connects to the solenoid block can contact the rear subframe resulting in air leaks from one or more air hoses

The use of safety glasses is recommended for the duration of this procedure

Production change
Air hose routing has changed from VIN SJAAF1ZV8JC019680

Measure
1) Position the vehicle on a ramp and place into “Jack” mode

Once the air has been discharged from the air suspension struts, the vehicle must NEVER be lowered and allowed to rest on its
wheels which will compress the discharged air suspension struts. Failure to comply may result in internal damage of the air bellows
leading to catastrophic failure of the air suspension strut/s
2) Remove the cover for the air supply unit - Refer to Rep.Gr 43
3) Referring to Figure 1 (circled) - Check the following air suspension hoses for air leaks due to contact/chaffing with the right hand side of the rear
axle subframe/nearby components
•

Red hose

•

Green hose

•

Both violet hoses

•

Blue hose

•

Black hose

Figure 1

NOTE: If there are issues relating to hoses contacting the subframe which result in an air leak carry out the following instructions from step 4

OR
If there are NO leaking hoses or NO hoses which have signs of damage/chaffing, Check the pneumatic components of the running gear with Guided
Fault Finding and special tool VAS 751 001 - Refer to Repair manual Rep.Gr 43 Air suspension - To check
4) Discharge the complete suspension system Refer to “Air suspension system – To discharge and charge – Rep.Gr 43

Once the air has been discharged from the air suspension struts, the vehicle must NEVER be lowered and allowed to rest on its
wheels which will compress the discharged air suspension struts. Failure to comply may result in internal damage of the air bellows
leading to catastrophic failure of the air suspension strut/s
5) Carry out an inspection of the air hoses to determine which hoses have air leaks, once clarified carry out the repair of the applicable hose/s
IMPORTANT: Should any of the remaining hoses have signs of contact with the subframe but are not as yet leaking it is advisable to conduct the
same repair method to eliminate a repeat visit

If more than one air hose is damaged, a staggered repair of the air hoses is necessary this is to avoid contact of the new connection pieces, to
achieve a staggered repair the pipe repair kit will be required as the hose/s will require lengthening by using the hose from the repair kit (see Parts
information)
Air pipe repair
For clarity the onward repair instruction is detailed for the red pipe with a diameter of 4mm, the method of repair for the green, blue
and black pipes (4mm diameter) is the same
For violet hoses the method of repair is the same although the hoses are larger in diameter (6mm)
6) Disconnect/unscrew both violet hoses from the solenoid block
7) Disconnect/unscrew the red and green hoses from the solenoid block
8) Referring to Figure 2 (Point A) - Fit replacement solenoid connectors to the solenoid block - 3 Nm IMPORTANT: Do not remove the white bungs

until the air hoses are to be refitted

- Referring To (Point B) - Fit replacement solenoid connectors to the solenoid block - 3 Nm IMPORTANT: Do not remove the white bungs until the

air hoses are to be refitted
•

Carry out a visual check of the blue and black hoses to check/confirm they are not chaffing against the subframe or any other nearby
component, should the hoses be damaged/chaffing on the subframe the hoses must be repaired as per the onward instructions, once repaired
they must be secured away from the component in which the hose/s were in contact with

Figure 2
IMPORTANT: The next part of the procedure requires the hoses to be shortened and/or repaired to remove any risk of future contact between the
subframe
9) Disconnect the clip shown in Figure 3 from the air supply unit/solenoid block

Figure 3
•

Once disconnected carefully manoeuvre the air pipes away from air supply unit/solenoid block NOTE: Do Not disconnect any further air pipe
securing clips

10) Clean the area of the hose in which the air leak is evident NOTE: Any dirt entering the system can cause malfunctions or failure
•

Using VAS 6228 or similar (Figure 4) cut the hose (at a right angle) as shown in Figure 5, take care not to unnecessarily shorten the hose as it
may then be to short when refitting back into the solenoid block

•

CAUTION: Ensure that the damaged section of the hose is removed, should the hose/s require lengthening the same instructions apply, Repair
kits containing replacement hose and connections are available - see Parts information

Figure 4

Figure 5
11) Fit the connection piece/lengthen applicable hose/s as described within the next steps
•

A maximum of two repair locations are permissible per pipe

•

On integrated pipe sections, only one repair location per pipe is permissible

•

The repair location must be recorded and added to the vehicles documentation

•

Use a waterproof pen to mark the end of the two sections of the previously cut pipe, use 17mm/22mm marks (Figure 6) to confirm the pipes
have been properly inserted into the connection piece

Figure 6
•

Referring to Figure 7 - Exerting moderate pressure, push the air pipes all the way into both ends of the connection piece -1-.

•

Air pipes have been properly fitted if only one of the two marks is visible -arrow A-.

Figure 7
•

Figure 8 shows the connection piece fitted

Figure 8
12) Fit rubber insulation or suitable cloth insulation tape around the connection (Figure 9)

Figure 9
NOTE: Protection should also be applied to any hoses in which the newly fitted connector may contact, the hoses should also be secured with a
suitable cable tie (Source locally) to prevent any movement
13) Referring to Figure 10 - Shorten/cut the red air hose (at a right angle) to the specified length using VAS 6228 or similar

The measurements quoted within the onward instructions, should be used as a guideline only – Please ensure the specified length
can be achieved prior to cutting the hose otherwise the hose willrequire lengthening
There are no recommend dimensions for the blue and black hose the operative must ensure that when a repair has been conducted
the hoses should be suitably protected and secured to avoid future contact with the subframe or nearby components

Figure 10
•

The Red hose is shown after cutting. The measurement to the end of hose must be 216 mm from (Point A existing clip Refer back to Figure 3)
to the end of the hose

•

Green hose - After cutting - The measurement from the existing clip to the end of the hose must be 195 mm

•

Prior to cutting the violet hoses take note which of the violet hoses has the white identification mark as after cutting this will no longer be evident
TIP: Apply masking tape to the pipe prior to cutting see Figure 11 as an example of the masking tape applied

Figure 11
•

Both violet hoses - After cutting - The measurement from the existing clip to the end of the hose must be 226 mm

14) Figure 12, Shows the four hoses cut to their specified lengths

Figure 12
15) Remove the caps from the solenoid block connectors (Figure 13)

Figure 13
•

Use a waterproof pen to mark the ends of the x4 pipes, use 17mm/22mm marks (Figure 14) to confirm the pipes have been properly inserted
into the connection piece

Figure 14
•

Referring to Figure 15 - Exerting moderate pressure, push the x4 air pipes -1- all the way into the solenoid block connector -1- IMPORTANT:

•

All x4 pipes have been properly fitted if only one of the two marks is visible -arrow A-.

Ensure the hoses are fitted back into the correct locations within the solenoid block

Figure 15
16) Should witness marks be evident on the subframe (due to contact with the air hoses) clean away any marks and apply suitable black anti
corrosion protective paint to the affected area
17) Charge the complete suspension system Refer to “Air suspension system – To discharge and charge – Rep.Gr 43
•

Check/confirm there are no air leaks from the repaired air hoses and solenoid block

•

Refit the cover for the air supply unit Refer to Rep.Gr 43

Check and confirm the air suspension system is fully charged, the vehicle must NEVER be lowered and allowed to rest on its
wheels which will compress the discharged air suspension struts. Failure to comply may result in internal damage of the air bellows
leading to catastrophic failure of the air suspension strut/s

Warranty accounting instructions
Time to conduct instruction with x1 hose repaired
Warranty Type

110 or 910

Labour Operation Code

43 24 41 00 (Use 43 24 41 99 until 06/06/19)

Damage Service Number

43 24

Damage Code

00 50

Time

60TU

Time to conduct additional hose repairs
Warranty Type

110 or 910

Labour Operation Code

43 24 42 00 (Use 43 24 42 99 until 06/06/19)

Damage Service Number

43 24

Damage Code

00 50

Time

10TU

Parts information
Part Number

Quantity

7L0 616 829 - Repair
connector (6mm Pipe)

As Required

4F0 616 241 - Repair
connector (4mm pipe)

As Required

7L0 616 758 – Connector
(6mm pipe)

2

4B0 616 751 – Connector
(4mm pipe)

2

4M0 698 141A - 6mm pipe
repair kit

1 (only use if the air hose/s requires
lengthening)

4M0 698 141 – 4mm pipe
repair kit

1 (only use if the air hose/s requires
lengthening)