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Radar Module -Front center (MRR) - Component Failure / error code C21A909
#5
Hi there,

Thank you for your message.

There is a sufficiently high probability that this is a potential hardware issue.

Please perform the following steps:

- Write the VIN to the MRR Front Center.
- Write the SecOC.
- Perform a hard reset.
- Allow the vehicle to enter sleep mode completely.
- After the vehicle has completed the sleep cycle, send us the DTC report for the MRR Front Center only.

Once we receive the DTC report, we will continue with the analysis.


Best regards,
Freesker Team
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RE: Radar Module -Front center (MRR) - Component Failure / error code C21A909 - by Freesker Support - 02.08.2026, 23:36

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