Persistent power loss problems with BMW M5 E60

Hi all, I have a BMW M5 E60 that constantly displays a 'loss of power' message. I have taken the car several times to the official BMW technical service, but they have not been able to solve the problem and each visit results in a considerable bill. Has anyone experienced something similar? What could be causing this problem and what solutions are there? Also, could you recommend me the best specialized BMW workshop in Spain? Thanks in advance for your help!

(Translated from Spanish)

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Mini Cooper 1.6 D 82kw Error code 40A4. The car doesn't have any problems, but sometimes the engine warning light comes on. Then it turns itself off after two or three days.

Quotation:
@Lesorelle3488 wrote on
Mini Cooper 1.6 D 82kw Error code 40A4. The car doesn't have any problems, but occasionally the engine warning light comes on. Then it turns off by itself after two or three days.

Inspect the DPF (Diesel Particulate Filter) and its sensors, as error code 40A4 often relates to DPF issues. Ensure the filter isn't clogged and that the sensors are functioning correctly. If the problem persists, consider having a professional perform a regeneration or further diagnostics. Let me know if you have any questions or need more help!

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