BMW transmission control module update.
The owner requested the latest BMW gearbox software. We used AutoHex, with ISTA/P, WinKFP and tuning-tool access available as alternatives if recovery was needed. Workshop equipment:
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BMW 135i N54 inlet-valve walnut blasting.
We removed carbon from the inlet valves. Deposits can affect airflow and running, but cleaning does not prevent them returning; we have seen accumulation again within a year.
Breather-system condition should also be considered when investigating repeated deposits.
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