Technical product information
Coolant pump leaking (part number 07P 121 008C) - Low coolant warning - Engine overheating - DTC's evident
Australia E04 Bentley rest Asia and Australia (6E04),China 796 VW Import Comp. Ltd (Vico), Beijing (6796),Germany E02 Bentley
rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08 Bentley South Korea (6E08),United Arab Emirates E06
Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK (6E01),United States E05 Bentley USA and rest America
(6E05)
Bentley

Topic
Market
area

Brand
Transaction
2071239/1
No.
Level
EH
Status
Approval
Release
date
New customer code

Object of complaint
engine -> cooling system
engine -> cooling system -> coolant
lighting system, signalling -> sound signals -> "coolant level" acoustic warning

Complaint type
Position
leaks
component / consumables -> too little
functionality -> activates

Vehicle data
W12 Bentayga - New Continental GT/GTC - New Flying Spur
Sales types
Type
3S31AB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31EB
3S31EB
3S31EB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41EB
3S41EB
3S41EB
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14G9
4V14G9
4V14G9
4V14G9

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MY
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2017
2018
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Brand Designation Engine code Gearbox code Final drive code
E
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E
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E
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E
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E
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E
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E
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E
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E
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E
*
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ZG21BB
ZG21BB
ZG21BB
ZG21BB
ZG26BB

2020
2021
2022
2023
2023

E
E
E
E
E

Documents
Document name
master.xml

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Technical product information
Coolant pump leaking (part number 07P 121 008C) - Low coolant warning - Engine overheating - DTC's evident

Transaction No.: 2071239/1

Customer statement / workshop findings
One or a combination of the following is evident:
•

Coolant leaking from the mechanical coolant pump

•

Coolant witness marks on the mechanical coolant pump although coolant is not leaking/dripping from the pump

•

Low coolant level warning displayed within the DIP

Or
•

Engine overheating issues and/or DTC P218100: Cooling System Performance with symptom code 8113 or air in the coolant DTC’s
(various) is evident, in this scenario the operative should also refer to TPI 2051893/-

Technical background
CAUTION
This TPI is only applicable to vehicles which have a mechanical coolant pump with the part number of 07P 121 008C
However
In the event that a mechanical coolant pump with the part number of 07P 121 008B is fitted please refer to TPI 2071238/HINT: A borescope may have to be used when checking the part number of the mechanical coolant pump
NOTICE
NOTE TO PRODUCT SUPPORT: All confirmed C level coolant pump complaints MUST be second levelled to the Powertrain Senior Engineer
for review, please wait for a response from the Powertrain Senior Engineer before responding to the retailer

Production change
-

Measure
07P 121 008C mechanical coolant pump fitted
1) On receipt of the vehicle - Take a photograph of the coolant level within the coolant reservoir
•

Using ODIS check to confirm that no DTC’s are evident relating to low coolant or overheating issues in particular

DTC P218100: Cooling System Performance with symptom code 8113
Or
Air in the coolant DTC’s (See Customer statement/workshop findings section if DTC P218100: Cooling System Performance with symptom code
8113 or Air in the coolant DTC’s are evident
•

Save the current ODIS log

•

Take a photo of any coolant related warnings which are evident within the DIP

•

Take a photo of any suspected coolant leaks

WARNING
The next part of the process requires the coolant system to be pressure tested, the operative must ensure the instructions within Rep.Gr 19
are followed. The engine MUST BE cold before conducting the pressure test
2) Referring to Rep.Gr 19 - Pressure test the coolant system to confirm if a coolant leak is evident from the mechanical coolant pump
NOTICE
VERY IMPORTANT: In the event that a leak is evident on a C level mechanical coolant pump and coolant is leaking/dripping as a result of
conducting the coolant pressure test - Record a clear video of the leak (whilst carrying out the pressure test) the video must then be uploaded
to a new or existing DISS query
•

Refer to the video located within the Bentley Hub reference TPI 2071238/- the video shows an example of a coolant pump with no leak
although a small coolant witness mark is evident (Figure 1) in this scenario the coolant witness mark should be cleaned off (using a suitable
cleaning agent) to the condition shown in Figure 2

INTERNAL

Figure 1

Figure 2
In the event that coolant is not leaking from the mechanical coolant pump whilst conducting the pressure test the operative
must conduct Step 3 (road test) to confirm if a coolant leak is evident or not
However
If a coolant leak is evident whilst conducting the pressure test the operative must go directly to Step 4
3) Conduct a road test
•

On return conduct a visual check to confirm if the leak is evident or not

•

Should a leak not be evident, no further action is required

TIP: In the event there are no visible coolant leaks from the mechanical coolant pump and the coolant level is to specification as per Rep.Gr 10 DO NOT replace the mechanical coolant pump (No further action is required)

INTERNAL

However
• If a visible coolant leak is evident the operative should continue with the remaining instructions from Step 4
4) Referring to Figure 3 - Disconnect each vacuum hose with care from the Solenoid for coolant circuit N492 - visually monitor for any traces of
coolant

Figure 3
HINT: Refer to the video on the Bentley Hub referencing TPI 2071239/VERY IMPORTANT: If traces of coolant are evident during disconnection, take clear photos or record a clear video of any coolant within the
vacuum hoses or N492 and attach to a new or existing technical DISS query
Please note the quoted video should be used for reference purposes only as it may not show the same part which is fitted to the applicable
vehicle (although the symptom is the same regardless of the type shown)
•

Use a Mityvac or similar vacuum tool to check and confirm there are no vacuum related issues/leaks present within the system to check and
confirm if N492 is sticking open and supplying a constant vacuum

5) The operative must raise a technical DISS query or respond via an already open DISS query to request permission to replace the mechanical
coolant pump ensuring the following is attached to the DISS query:
•

Clear photo of the coolant level

•

Clear photo of the original mechanical coolant pump part number 07P 121 008C (Figure 4)

•

Video of the coolant leak whilst carrying out the pressure test

•

Current ODIS log

•

Await feedback via DISS before replacing any parts

NOTICE
NOTE TO PRODUCT SUPPORT: All confirmed C level coolant pump complaints MUST be second levelled to the Powertrain Senior Engineer
for review, please wait for a response from the Powertrain Senior Engineer before responding to the retailer

NOTE: The photo shown in Figure 4 is a C level coolant pump (shown removed from the vehicle for photographic purposes) a borescope may
have to be used for photographs of the coolant pump when fitted

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Figure 4
6) Once permission has been given via the technical DISS query, replace the following
•

Mechanical coolant pump - Rep.Gr 19

•

Solenoid for coolant circuit N492 assembly - Rep.Gr 19

IMPORTANT: Ensure the vacuum hoses are free from moisture DO NOT use compressed air to attempt to remove moisture from the vacuum
hoses (allow the moisture to naturally evaporate from the vacuum lines) as damage to other components and unintentional disconnection of
vacuum hoses can occur if compressed air is used
Ensure all procedures within the Repair manual are followed including any alignments/calibrations which are required
(Depending on vehicle specification)
NOTE: Do not discard the mechanical coolant pump (07P 121 008C or N492) as they may be requested for analysis
7) Conduct a road test to confirm the issue is no longer evident

INTERNAL

Warranty accounting instructions
Warranty Type
Damage Service Number
Damage Code
Coolant pressure test
Labour Operation Code
Time
Diagnosis time
Labour Operation Code
Time
Road test
Labour Operation Code
Time

110 or 910
19 50
00 50
19 01 01 00
10 TU
01 50 00 00
As per ODIS log (Must not exceed 30 TU)
01 21 00 00
50 TU

Bentayga
Time to replace the mechanical coolant pump and N492 assembly
Labour Operation Code 19 50 19 51
Time
70 TU
Time to remove and refit the front end module
Labour Operation Code 50 38 19 00
Time
760 TU
New Continental GT/C
Time to replace the mechanical coolant pump and N492 assembly
Labour Operation Code 19 50 19 01
Time
250 TU
New Flying Spur
Time to replace the mechanical coolant pump and N492 assembly
Labour Operation Code 19 50 19 00
Time
210 TU

Parts information
Refer to the ETKA parts catalogue

INTERNAL