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: You must remove the upper intake plenum and then the lower plenum assembly.
: A forum proposal for increasing competitiveness in tournament qualifying matches.
: Once the plenum is out, the breather valve is accessible. Swap the old unit (often referred to as part #14 in technical diagrams) with the new valve. 124891
: Disconnect the oil separators. Note that you may need to disconnect the Vanos Solenoid wiring to reach these bolts; use caution as these connectors can become brittle with age.
: Necessary to remove the oil separator from the lower plenum. 8mm socket : Used for the intake funnels/trumpets. : You must remove the upper intake plenum
: Small ones to pry the electrical connector and a larger one for hose clamps.
This process involves removing the intake plenum to access the valve located underneath. Swap the old unit (often referred to as
While the BMW DIY is the most common association for a "write-up" with this number, "124891" also appears in other contexts: