BMW 5 Series: Screw connections
Some of the Aluminum-steel connections in the G30 body structure are produced using a new body joining technique: flow drill screws. These include, for example, the connection between the engine support (Aluminum extruded profile) and the bulkhead carrier support (ultra-high-strength hot-formed steel).
Flow drill screws are driven directly into the body structure. When this happens, the specially shaped tip produces a flow hole and a thread is then cut. This joining technique is used exclusively in production.
G30 Screw connection of engine support/bulkhead
- Engine support
- Engine support connection
- Flow drill screw
Once a flow drill screw connection has been loosened, it must not be re-joined using flow drill screws.
Otherwise this will lead to a considerable reduction in strength.
In the event of a repair according to Body Repair Level 2 and 3, the flow drill screws are replaced by blind rivets.
Roof support
The G30 body structure has a hydroformed roof support made of steel. This is welded to the roof side frame in line with the B-pillar. By using a hydroformed section it has been possible to reduce the vehicle weight along with increasing the stiffness of the body. On vehicles with a slide/tilt sunroof or panorama glass roof the reinforcement is incorporated in the relevant roof frame.
G30 Hydroformed roof bow
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Repair Level 1
Taking into account the repair stages of the BMW workshop information system,
the body repair work
in the Technical Qualification is divided into 3 repair levels. Each of the 3
Body Repair Levels in
Front fenders
Air Breathers are also used on the front fenders of the G30. The Air Breather
is an air outlet behind the
front wheel, which diverts the air flowing into the rear region of the wheel
well in a contr
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Control units on the K-CAN3
Frontal Light Electronics
Frontal Light Electronics Right and Left
The control units Frontal Light Electronics Right (FLER) and Frontal Light
Electronics Left (FLEL) are
installed in the corresponding headlight.
The Frontal Light Electronics includes:
LED activation in the corresponding headlig
Tow-starting and towing
Safety information
Warning
Due to system limits, individual functions can
malfunction during tow-starting/towing with the
Intelligent Safety systems activated. There is a
risk of accident. Switch all Intelligent Safety
systems off prior to tow-starting/towing.
Steptronic transmission:
transporting t
