54 34 503 Removing and installing/replacing hydraulic valve (solenoid valve)

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 135i, and 2010 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks: Remove right wheel arch panel.

IMPORTANT: Hydraulic fluid may emerge from the open connections on the hydraulic unit. Protect components and work area with suitable materials (e.g. cloths). Make sure that dirt cannot get into the hydraulic circuit. Follow repair instructions for hydraulic system. Do not fit hydraulic lines in kinked, crushed or transposed condition.

Unlock plug connections (1) and disconnect. Disengage rubber tensioner (2). Remove hydraulic unit from side box.

Fig 1: Identifying Plug Connections And Rubber Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Overview Of Hydraulic Valves F1, F2 And F3

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Hydraulic unit must be held in the vertical position, otherwise fluid will escape.

Change shown on hydraulic valve F2. Analogous procedure for hydraulic valve F1 and F3. When removing several hydraulic valves, mark the plugs at the respective slots. Unfasten plug connection (1) and disconnect. Release screws. Tightening torque 54 34 18AZ. Detach hydraulic valve. Important! Protect exposed bores against dirt contamination. Do not mix up plug connections.

Check oil level or top up if necessary. Run a function check. Fully open and close soft top a minimum of 3 times in order to bleed the hydraulic system.