BMW SME Crash Data Reset & HV Battery Unlock | Remote Programming

💡Problem Statement: When Do You Need BMW SME Crash Data Reset Service?

BMW will not enter READY mode after an accident? High Voltage battery remains locked?

You may need our BMW SME Crash Data Reset, HV Battery Unlock & Remote Programming Service when your BMW i4, i5, iX, or supported G Series vehicle has been repaired after an accident or collision, but the high-voltage system still will not activate or return to normal operation. A common situation is that the physical collision damage has already been repaired, airbags and safety components have been addressed, and diagnostic faults have been cleared, but the BMW still will not enter READY mode, will not charge, or continues to report high-voltage battery and drivetrain faults.

Not enter READY mode

BMW will not enter READY mode after an accident.

Vehicle will not start

The vehicle will not start or drive after collision repair.

High-voltage (HV) battery remains locked

High-voltage (HV) battery remains locked, disabled, or the system will not activate.

Warning remains on the dashboard

The drivetrain malfunction warning remains on the dashboard. Faults return immediately after clearing with a diagnostic scanner.

High-Voltage System warning

High-Voltage System warning or shutdown condition. Charging unavailable, or the vehicle will not charge.

HV contactors will not close

Replacing or repairing collision-damaged components does not restore HV operation.

Communication with the SME is unavailable

Communication with the SME is unavailable or intermittent. However, this issue is not always related to Crash Data.

Crash-related counters

You may have Crash-related counters or safety conditions that require a reset in the scan tool, Autel, Launch, or ISTA.

Crash data or safety events

SME crash shutdown remains active after repairs. Crash data or safety events remain stored in the SME.

⚠️ Symptoms & Errors

BMW SME Fault Codes after Crash: Common DTC

Depending on the BMW model, SME version, and actual cause of the failure, diagnostic scans like Autel, BMW ISTA, ESYS, or Launch may report crash-related or high-voltage faults such as:

The good news is that these errors can be fixed by ArmHex BMW SME Crash Data Reset Remote Online Service!

21F37E: Crash Detected / Crash Event

21F44F: SME Pyrofuse / Safety Disconnect Fault

21F21E: Main Contactor / Switching Counter Fault

21F465: Pyrotechnic Safety Switch Actuation Fault

21F21E: HV Battery Main Contactor Switching Counter Exceeded

21F152: High-Voltage Safety Plug Open

21F21F: HV Safety Box / Insulation Monitoring Fault

21F393: HV Battery Transport-Restricting Fault Memory Active

3B001A: High-Voltage System Cannot Be Activated

3B0044: SME Internal Control Unit Fault

✅ Solution

How to Repair BMW 21F37E SME Crash Detected Fault?

The BMW 21F37E SME Crash Detected fault may remain stored after an accident, even after the vehicle's physical damage and high-voltage safety components like Pyrofuse have been replaced and HV cells balanced. Our BMW SME Crash Data Reset Service uses a combination of SME file crash-data repair and remote online programming and coding to restore supported modules after collision repair.

Step 1: Send us photos of the SME, label, part number, board, and chips.
Step 2: Provide clear photos of all BMW SME fault codes & Live Data
Step 3: Using the programmer, read the SME memory dump/files
Step 4: Write repaired file we send you and reinstall SME in the vehicle.
Step 5: Check pyro fuses, cells, interlock, contactors, wiring, isolation
Step 6: We connect remotely and program and code SME

The Results

SME Has Been Successfully Reset and Coded

After a successful BMW SME Crash Data Reset and remote programming, supported crash-related faults such as 21F37E are reset, and the SME is properly programmed and coded to the vehicle. Once all pyrofuses, HV battery cells, contactors, interlocks, and safety components are confirmed operational, the high-voltage system can return to normal operation, including READY mode, charging, and vehicle startup, provided no additional faults are present.

Before

SME Crash Data and HV Lock

After a collision, stored SME crash data can keep the HV system disabled, causing No READY mode, charging/startup issues, and DTCs 21F37E, 21F21E, or 21F44F.

After

SME Reset & HV System Restored

After BMW SME Crash Data Reset and programming, supported crash locks and counters are reset, allowing the repaired HV system to activate, enter READY mode, and operate normally when all safety components are functional.

What To Expect After

SME Crash Data Is Cleared

After a successful BMW SME Crash Data Reset, HV Battery Unlock, and remote programming, supported crash-related data and safety lock conditions are reset, and the SME is properly programmed and coded. Once the HV battery and safety components are verified, the vehicle can return to normal high-voltage operation, READY mode, charging, and driving without unnecessary SME replacement.

No 21F37E and SME Crash Detected

No HV Battery Lock / Crash Shutdown

No READY Mode / HV System Disabled

No Crash-Related Contactor & Pyro fuse Faults

⭐ Benefits

Getting 21F37E DTC and SME Crash Detected? Locked HV system? We'll Make It Work!

✓

Recover Crashed BMW SME and Save Thousands on Every Repair

Recover a crashed BMW SME and avoid the high cost of a new replacement.

✓

Keep the Repair in Your Shop. No Outsourcing, No Towing.

Complete the entire repair remotely from your own workshop, saving time, reducing costs, and keeping your customer in-house.

🚗 Coverage & Compatibility

BMW SME Crash Data Reset: Supported Vehicles

Before purchase, please contact us if your BMW, Mini, or vehicle model is not on the list.

BMW SME Crash Data Reset

Fully Electric (BEV)

BMW i4 (G26 BEV)
BMW iX (I20)
BMW i5 (G60)
BMW iX1 (U11)
BMW iX3 (G08)
BMW i7 (G70)

Plug-in Hybrid (PHEV)

BMW 330e (G20)
BMW 530e (G30 / G60)
BMW 745e (G11 / G12)
BMW X5 xDrive45e (G05)
BMW XM (G09)

BMW G-series PHEV

Other models

📋 Remote Session Process and steps

How Does the Remote Service Work

A clear 5-step remote path — from compatibility check to post-service guidance.

Connect to ARMHEX

Any remote session starts here. Contact us on WhatsApp and check compatibility.
Buy the Service

Buy the service and schedule the service at your best time. We will send you the remote session software.
Prepare Tools and files

Read the SME files and send us. Get the repaired file and write back.
Programming Starts

We contact you on WhatsApp and start remote programming and coding.
You're Done

We verify the results, confirm the module operates correctly, and clear any applicable errors.

🔧 Requirements

What Tools do You Need?

Programming tools to read SME files
Stable Internet & Windows
ArmHex Remote Session Software
Battery Maintainer
You may need ENET Cable & USB Adapter (Contact us)

🕒 Turnaround Time

Typical Service Time

30–45

Minutes for the most compatible models.

❓ FAQ

Frequently Asked Questions

It is typically triggered by the Crash Data Activation signal and the Collision counter exceeding limits in the HV battery system.

This is a permanent module-level correction, not a temporary fault clear.

Yes, especially when caused by the SME Crash lock after an accident.

Yes. The procedure uses BMW-level secure coding methods designed for HV systems.

No. This is a fully remote service for technicians. The owners may decide to send it.

No. After our service, it is ready for plug-and-play installation with no additional dealer programming required.

Contact us by email or on WhatsApp. We need to know the module part number, photos of it, photos of the errors, the car year and model, short history of issues.

We support the most common BMW G Series SME control units.

ArmHex Automotive Software Solutions

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100% Money-Back Warrantee

100% Guaranteed to Work

Start Your Remote Session Now

BMW SME Crash Data Reset Remote Online Service

Complete the SME Crash Data Reset in your workshop and Unlock High Voltage system

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