🛠️ How to Fix a BMW FRM Module After a Jump Start or Battery Disconnect
Share
If your BMW's windows, lights, or mirrors suddenly stop working after a battery disconnect or jump start, your FRM module may be corrupted. Here's why it happens — and how you can fix it without replacing the entire unit.
🔧 What Is the FRM Module?
The FRM (Footwell Module) in BMW and MINI vehicles controls essential body functions such as:
-
Power windows
-
Interior and exterior lighting
-
Power mirrors
-
Door lock signals
It communicates with other modules over the CAN bus and is a crucial part of your vehicle’s comfort and lighting systems.
⚠️ Why FRM Modules Fail After Battery Issues
This is a well-known fault, especially in E90, E91, E92, E70, E87, E84, F10, and MINI R-series models.
Common scenarios include:
-
Jump-starting the car with a weak battery
-
Disconnecting or replacing the battery
-
Low voltage while programming/coding
When the voltage drops suddenly, the EEPROM or flash memory inside the FRM corrupts, causing the module to become unresponsive or “bricked.”
🔍 Symptoms of a Bricked BMW FRM Module
-
Power windows not working
-
Lights stuck on or completely off
-
No interior dome light control
-
No communication via OBD or ISTA
-
Diagnostic tools cannot detect or read the FRM
-
Cluster may show multiple errors or malfunctions
🧪 How We Diagnose & Repair FRM Modules
Unlike dealerships that usually recommend full replacement, we diagnose and repair FRM modules at the chip level, saving you money and preserving original coding.
Our repair process includes:
-
Reading EEPROM via bench tools
-
Correcting corrupt firmware
-
Restoring original coding (including VIN and light settings)
-
Reflashing or unlocking the FRM
-
Functional bench test before return
💡 Most FRM repairs are completed same day and require no dealer reprogramming after installation.
💸 FRM Replacement vs. Repair – What's Better?
| Option | Cost | Coding Required | Original Settings Retained |
|---|---|---|---|
| Dealer Replacement | $$$$ | Yes | ❌ |
| Our Repair Service | $$ | No | ✅ |
By repairing the original FRM, you keep all your car’s original configurations, avoid expensive coding fees, and get your vehicle back on the road faster.
🛠️ Supported Models
We support a wide range of BMW & MINI vehicles including:
-
BMW E90, E91, E92, E93
-
E70 X5, E71 X6
-
E87 1 Series, E84 X1
-
F10, F30 with FRM2 or FRM3
-
MINI R55, R56, R57, R60
📩 Get Your FRM Repaired
If your BMW or MINI has lost power to windows, lights, or locks after a battery issue, don’t replace the FRM just yet.
✅ Fast turnaround
✅ Affordable pricing
✅ Fully tested with warranty
📞 Contact us now to book your FRM module repair or send it by post.
📍 Nationwide service | Local drop-off & mail-in accepted