17 21 500 Flushing transmission oil cooler with lines (automatic transmission) (GA6HP19Z, GAHP26Z, GA6HP32Z): Procedure

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Automatic transmission removed.

Connect appropriate adapters (see description below) to oil lines exiting from automatic transmission.

Connect connecting line 17 2 019 from the oil collection unit with the quick-release coupling.

Connect drain line 17 2 018 using quick-release coupling.

Hold and direct open end of drain line into a suitable drip tray.

Using oil collection unit, flush approx. 1 liter of transmission fluid through oil lines and transmission oil cooler.

Use only approved transmission fluid:

Trade name	BMW part number	Container size
ATF oil Shell L12108	83 22 2 152 426	20 liters

Reposition quick-release couplings.

Flush oil lines/transmission oil cooler in opposite direction with approx. 1 liter of transmission fluid.

Disconnect quick-release couplings.

Remove adapter.

NOTE: Dispose of flushing oil correctly.
Do not reuse under any circumstances.

Press hydraulic lines (1) into adapters (2).

Slide clamping bar (3) into guides and secure with screw (4).

Fig 1: Identifying Hydraulic Lines, Adapters, Clamping Bar And Screw

Courtesy of BMW OF NORTH AMERICA, INC.