Restore Your Hybrid System with a Genuine JLR BECM
Are you seeing a “Hybrid System Fault” warning? Is your Land Rover or Range Rover PHEV refusing to charge? Has a diagnostic scan revealed the critical fault code P0A1F? The solution is a replacement of the Battery Energy Control Module (BECM).
This is a brand new, factory-sealed, genuine Jaguar Land Rover part, ensuring safety, reliability, and perfect compatibility with your vehicle. A failing BECM is a critical issue that immobilizes the vehicle and compromises the high-voltage safety system. Replacing it with a new, genuine unit is the only correct repair procedure.
Common Failure Symptoms This Part Solves:
- Fault Code P0A1F (Battery Energy Control Module Internal Electronic Failure)
- Vehicle will not charge when plugged in
- “Hybrid System Fault” or “High Voltage Battery Fault” message displayed
- Vehicle will not enter “Ready” mode or start
- Sudden drop to zero electric range
Product Details:
- Part Number: LR137929
- Supersedes: LR124869, LR129339
- Engineering Number: L8B2-10C784-BB
- Condition: New, Genuine JLR OEM
- Compatibility: Fits specific Land Rover / Range Rover PHEV models including the Range Rover P400e and Range Rover Sport P400e. Verify compatibility with your VIN.
WARNING: LETHAL VOLTAGE. This is NOT a DIY part. The BECM is part of a 400V system. Replacement must only be performed by a qualified, certified EV/Hybrid technician with the proper training and safety equipment to de-energize and work on high-voltage systems. The new module also requires programming to your vehicle's VIN using JLR's Pathfinder software.
What is the Genuine JLR BECM Battery Energy Control Module?
Genuine JLR BECM Battery Energy Control Module is an OEM-grade product for Jaguar Land Rover vehicles, supplied by SX-TOOL with fitment guidance.
Which vehicles does it fit?
Fitment depends on the vehicle model and year. Send your VIN to SX-TOOL and they will confirm compatibility before you order.
How is delivery and installation handled?
The product ships with fitting instructions. Mechanical items are installed locally by your own installer, and SX-TOOL provides remote guidance during installation if needed.
Is this an original (OEM) part?
SX-TOOL supplies both genuine OEM parts and OEM-grade aftermarket products. Check the product description for the exact specification of this item, or ask support to confirm.

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