NHTSA ID Number: 11030694
Manufacturer Communication Number: 2081236/1
TSB/Document Date: 2026-04-04
Summary
Loss of Cabin Heat During Engine Operation | Bentayga - V8. Customers may report that the air conditioning system blows only cold air when the engine is running. Warm air is only available after switching off the engine. The concern is commonly reported after engine removal or recent repair work.
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TSB/Document ID: 2081236/1
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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Technical product information
Topic
Loss of Cabin Heat During Engine Operation | Bentayga - V8
Market area
Bentley
: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)
Brand
Transaction No. 2081236/1
Level
EH
Status
Released for publishing
Release date
March 17 2026
New customer code
Object of complaint
Complaint type Position
air conditioning -> heating, cooling functionality
Vehicle data
Bentayga – V8 Variants
Sales types
Type
MY
Brand Designation Engine code Gearbox code Final drive code
4V14D9 2018 E
DCUA
RWH
QUT
4V14D9 2019 E
DCUA
RWH
QUT
4V14D9 2020 E
DCUA
RWH
QUT
4V14D9 2021 E
DCUA
RWH
QUT
4V14D9 2022 E
DWRA
VNV
QUT
4V14D9 2022 E
DWRA
RWH
QUT
4V14D9 2022 E
DWRA
VNR
WDP
4V14D9 2022 E
DWRA
VNV
WDP
4V14D9 2022 E
DCUA
RWH
QUT
4V14D9 2024 E
DWRA
VNV
QUT
4V14D9 2024 E
DWRA
RWH
QUT
4V14D9 2024 E
DWRA
VNR
WDP
4V14D9 2024 E
DWRA
VNV
WDP
4V14D9 2025 E
DWRA
RWH
QUT
INTERNAL
4V14D9 2025 E
DWRA
VNR
WDP
4V14D9 2025 E
DWRA
VNV
WDP
4V14D9 2025 E
DWRA
VNV
QUT
4V14D9 2026 E
DWRA
VNV
QUT
4V14D9 2026 E
DWRA
RWH
QUT
4V14D9 2026 E
DWRA
VNR
WDP
4V14D9 2026 E
DWRA
VNV
WDP
4V15D9 2024 E
DWRA
RWH
QUT
4V15D9 2024 E
DWRA
VNV
WDP
4V15D9 2024 E
DWRA
VNR
WDP
4V15D9 2024 E
DWRA
VNV
QUT
4V15D9 2025 E
DWRA
VNV
QUT
4V15D9 2025 E
DWRA
RWH
QUT
4V15D9 2025 E
DWRA
VNR
WDP
4V15D9 2025 E
DWRA
VNV
WDP
4V15D9 2026 E
DWRA
RWH
QUT
4V15D9 2026 E
DWRA
VNR
WDP
4V15D9 2026 E
DWRA
VNV
WDP
4V15D9 2026 E
DWRA
VNV
QUT
4V15J9 2026 E
DWNA
VQF
WDP
4V15J9 2026 E
DWNA
VQF
QUT
4V15K9 2026 E
DWNG
VQF
WDP
ZV14D9 2024 E
DWRA
VNV
QUT
ZV14D9 2025 E
DWRA
VNR
WDP
Documents
Document name
master.xml
INTERNAL
Connection offline
Transaction No.: 2081236/1
Loss of Cabin Heat During Engine Operation | Bentayga - V8
Customer statement / workshop findings
Customer Statement
Customers may report that the air conditioning system blows only cold air when the engine is running. Warm
air is only available after switching off the engine.
The concern is commonly reported after engine removal or recent repair work.
Workshop Findings
Customer findings verified in the workshop, heating remains cold with engine running, heating returns after
engine shutdown. No relevant DTCs stored in HVAC or engine systems.
Further inspection may reveal that two coolant hoses in the engine bay have the incorrect routing.
Technical background
The heating issue can be caused by two coolant hoses being reconnected in the wrong positions during
previous repair work. Incorrect routing prevents hot coolant from flowing through the heater matrix while the
engine is running, resulting in cold HVAC air. This is a repair induced issue, not a manufacturing defect.
Refer to the ‘Measure’ section for approved next steps.
Production change
Not applicable
Measure
WARNING
Ensure vehicle has cooled sufficiently before carrying out procedure. Failure to do so may cause injury to
personnel.
CAUTION
Avoid prolonged and repeated contact with oils and fluids etc. Always protect the skin with impervious
gloves. Always wear suitable eye protection. Collect all fluids into suitable containers.
Required Diagnostic & Inspection Steps
1. Position the vehicle on a ramp and set into "JACK" mode. Refer to "Raising and supporting the car"
→ Booklet 404
Prior to positioning the vehicle on a ramp, remove the wing retaining fixings on both A-posts → Rep. Gr. 50
INTERNAL
2. Gain access to coolant hoses.
Set the front-end module into the "service position”. Refer to "Front end module - To remove and fit"
→ ElsaPro Rep. Gr. 50
Figure 1. Coolant hose inspection (correct orientation)
3. Inspect the two-coolant hose -circled-.
4. Use the diagram below to assist confirming correct hose fitment.
INTERNAL
Figure 2. Correct coolant hose routing diagram
If incorrect:
5. Drain coolant as required.
ElsaPro → Rep. Gr. 19
6. Reconnect hoses in their correct positions as shown in figure 1 & 2.
7. When all hoses, pipework and connections have been connected, slide the front-end module back along
the bolts and fit the bumper beam fixings, removing the supporting bolts when necessary. Set the front-end
module back to the factory configuration.
ElsaPro → Rep. Gr. 50
8. Refill and bleed the cooling system.
ElsaPro → Rep. Gr. 19
INTERNAL
9. Run the engine to operating temperature.
10. Confirm stable warm air delivery from HVAC.
11. Check for leaks and confirm correct coolant bleeding.
NOTICE
fitment, please raise a full technical DISS query.
Include the following in the full technical DISS query:
•
VIN, model, MY
•
Customer Statement: “2081236 Support”
•
Symptom description.
Parts information
No new parts required.
Existing hoses remain valid; only correct reconnection is needed.
INTERNAL
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