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Automotive glossary

Control Unit Reprogramming (Flashing)

Flashing replaces the software in a control unit with a new version.

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What is Control Unit Reprogramming (Flashing)?

Manufacturers use it to fix faults or improve functions. It is done with a scan tool or over the air. A stable power supply is essential. Software updates can fix drivability issues, warning lights or compatibility problems. Some updates are part of recalls or technical service bulletins.

How it works

The tool erases memory and writes new software.

Why it matters for your car

Interrupting the process can make the unit unusable. Use a battery support unit during flashing.

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