Addressing coolant contamination in a BMW gearbox.
An urgent BMW case brought an unusual coolant-and-oil mixture to light during gearbox-fluid work.
The workshop record
Gearbox fluid showing evidence of contamination.
The workshop record identifies a BMW F10 with coolant mixed into the gearbox oil.
That finding established an urgent transmission-fluid concern, but the source does not publish laboratory analysis or a complete cause report.
The work
A gearbox-fluid flush formed part of the response.
The post documents the case while discussing what may be seen during a gearbox-fluid flush.
Replacement components and the final test results are not stated, so the article stays with the confirmed contamination and fluid-service work.
What this record confirms
An urgent contaminated-fluid case taken into the workshop.
The record confirms coolant-and-oil mixture in the BMW gearbox and gearbox-fluid flushing activity. It does not support a broader mechanical conclusion.
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