2019-2022 Bentley Bentayga Hybrid Charging Controller: Programming, Faults, and Replacement
This guide covers the essential details of the Electric Vehicle Charging Controller (EVCC) for the Bentley Bentayga Hybrid, focusing on the critical programming requirements and known charging issues.
- This module is NOT plug-and-play. It requires mandatory online programming (Component Protection removal) by a dealer or specialist to function.
- Failure symptoms include not charging, interrupted charging, and a dead 12-volt battery.
- A known issue on 2019-2020 models is the failure of the timed charging feature, as noted in TSB 2060117/1.
- A used OEM module is a cost-effective part source, but the main expense is the specialized labor required for programming.
Symptoms of a Failing EV Charging Controller
A problem with the EVCC can leave you unable to charge your Bentayga Hybrid. Symptoms are almost always related to the charging process and can sometimes be mistaken for a bad battery or charging station.
- Complete Failure to Charge: The most obvious symptom is the vehicle not accepting a charge from any known-good charging station. The charging indicator may not light up, or it may show an immediate fault.
- Charging Starts and Then Stops: The vehicle may begin charging normally for a few minutes before the session aborts unexpectedly.
- "Charging System Failure" Message: A warning message may appear on the instrument cluster, indicating a fault within the high-voltage charging system.
- Dead 12-Volt Battery: The EVCC is often integrated with the DC-to-DC converter, which recharges the 12-volt battery from the main high-voltage pack. If this function fails, you may find the vehicle's conventional 12-volt battery is dead, preventing the car from starting or even unlocking.
- Timed Charging Malfunctions: A known issue for 2019-2020 models is the failure of the timed charging feature. You can set a departure time, but the vehicle fails to "wake up" and begin charging as scheduled. Immediate charging, however, may still work correctly.
Associated OBD-II Diagnostic Trouble Codes (DTCs)
A professional scan tool is required to read codes from the onboard charger module (diagnostic address 00C6). Common codes related to this system include:
- P31CD00: Charge cover A activation locking. A Technical Service Bulletin (TSB) exists for this code, noting it can sometimes be stored without any actual fault in the charge door.
- P0D9B00 / P0D9C00: Battery Charger Coupler Temperature Sensor "A" Circuit Low/High. These codes point to an issue with the temperature sensor in the charging port.
- U-Series Codes (e.g., U0354): Communication codes like these indicate a software or network problem between the EVCC and other vehicle modules.
Important: A recall was issued for some 2023 model year Bentayga Hybrids for a high-voltage battery that could overheat during charging. This issue is related to the battery cells themselves, not the EVCC. The fix is a software update for the Battery Management System (BMS). While it affects a different model year, it highlights the complexity of the vehicle's charging system.
Buying a Used Electric Vehicle Charging Controller
Due to the high cost of a new unit from Bentley, a recycled OEM controller is often a practical choice. However, there are critical factors to consider that do not apply to simpler mechanical parts.
This is NOT a plug-and-play part. Because this module is part of the Volkswagen/Audi Group (VAG) electrical architecture, it is subject to Component Protection (CP).
- Programming is Mandatory: A used EVCC must be programmed and adapted to your vehicle's specific VIN using dealer-level diagnostic tools with an online connection to Bentley's servers (often called GEKO access). Simply installing the part will not work; the vehicle will reject it, and it will not function.
- Verify the Part Number: Ensure the part number on the used module exactly matches your original. The primary OEM part number is 36A907813. While other numbers may exist, sticking to an identical match is the safest approach.
- Physical Inspection: When the part arrives, inspect the housing for any signs of physical damage, such as cracks or water intrusion. Check that all electrical connector pins are straight and free of corrosion.
- Why Used OEM is the Only Option: There are no new aftermarket versions of this complex controller. A used, genuine Bentley part is the only alternative to a brand-new one from the dealer. It contains the correct hardware and firmware designed specifically for the Bentayga's systems.
Pro Tip: Before purchasing a used EVCC, confirm you have a qualified repair facility that can perform the Component Protection adaptation. Not all independent shops have this capability. You may need to use a Bentley dealer or a specialist in high-end German vehicles. Factor the cost of this programming into your total repair budget.
Known Issues, TSBs, and Recalls
While no direct recalls exist for the 2019-2022 EVCC, several Technical Service Bulletins (TSBs) point to known issues with the charging system.
- TSB 2060117/1: AC Charging Timer Does Not Function. This bulletin specifically addresses an issue in 2019-2020 models where timed charging fails to activate. The recommended action is to diagnose and resolve any stored DTCs in the onboard charger module (00C6).
- TSB 2057470/3: Bentley Home Charging Unit Not Functioning. This addresses a problem where the official Bentley home charger fails to work with certain "un-earthed" electrical supplies. It requires a manual procedure to deactivate the Protective Earth (PE) conductor monitoring.
Cost of Replacement
Replacing the EVCC on a Bentayga Hybrid is an expensive repair, driven primarily by the cost of programming and high dealer labor rates.
| Part or Service | Estimated Cost |
|---|---|
| New OEM Module | $1,500 - $2,500+ (dealer part) |
| New Aftermarket Module | Not Available |
| Used OEM Module | $150 - $350 |
| Shop Labor (Installation & Programming) | $600 - $1,200+ |
Note: Labor costs are an estimate. Bentley dealer labor rates can exceed $250 per hour, and the mandatory online programming can take 2-4 hours. Always get a specific quote from the shop performing the work.
Frequently Asked Questions (FAQ)
Do I have to take my car to a Bentley dealer for this repair?
Not necessarily, but you must use a facility with the proper tools and online subscription to perform Component Protection programming. This is typically either a Bentley dealer or a highly specialized independent shop focusing on VAG brands (VW, Audi, Porsche, Bentley). A standard mechanic cannot complete this job.
Can I just swap the module from another Bentayga?
No. Due to the Component Protection anti-theft system, a module from another vehicle will be locked out by your car's gateway until it is officially adapted online. The car will not charge until this programming is completed.
My car won't charge. Is the EVCC always the problem?
No. Before replacing the controller, it's crucial to rule out other possibilities. Check the charging station itself, the charging cable, the vehicle's charging port for damage or debris, and the main high-voltage battery. A professional diagnosis with a Bentley-specific scan tool is necessary to pinpoint the fault.
Is the EVCC the same as the Battery Management System (BMS)?
No, they are different but related components. The EVCC manages the charging process from the external power source. The BMS is responsible for monitoring and managing the health of the individual cells within the high-voltage battery pack itself. They communicate with each other, but a fault in one does not automatically mean the other has failed.
Technical Specifications
OEM Part Numbers: 36A907813
Diagnostic Address: 00C6
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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