BMW 5 Series: Body overview, Body structure
Body overview

G30 Side frame structure
- Multiphase steel (> 300 N/mm²)
- Ultra-high-strength steel (> 900 N/mm²)
- Aluminum
- Deep-drawing steel (< 300 N/mm²)
- Other steel grades
- Inner roof frame
- Roof frame reinforcement
- B-pillar reinforcement
- Side sill reinforcement plate
- Outer side frame (deep-drawing steel)
Body structure
The lightweight body construction concept of the G30 comprises high-strength
steel and Aluminum
components. There is no Carbon Core used in the construction of the G30 body
like in the G12. The
use of die-cast Aluminum components has increased significantly. Thanks to the
material mix, the
materials are able to contribute their specific strengths to the vehicle in the
best possible way. As a
result of the strict lightweight construction philosophy, the weight of the body
has been reduced by
around 46 kg / 101 lbs over the predecessor F10, but crash safety has been
further improved.
Steel

G30 Ultra-high-strength steels in the body structure
- Carrier support, bulkhead
- Inner side frame
- Engine support extension
- Reinforcement plate, B-pillar
- Side sill reinforcement plate
- Outer connecting plate
Aluminum
The use of Aluminum extruded profiles and complex die-cast Aluminum parts
accounts for a rigid
body along with low weight. All requirements relating to passive safety are also
met.
The spring strut domes on the front, and for the first time also on the rear,
are manufactured using
the Aluminum pressure die casting process. As is already familiar from the G12,
the side members at
the rear are now also made as die-cast Aluminum components. This contributes to
excellent weight
distribution in the body structure. New Aluminum cast alloys were also developed
in order to increase
the crash safety of these components.

G30 Aluminum in the body structure
- Front spring strut dome
- Rear spring strut dome
- Side member
- Engine support
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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
sup
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
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Electronic transmission control (EGS)
Electronic transmission control (EGS)
Gear selector switch (GWS)
Gear selector switch (GWS)
The gear selector switch (GWS) is used for selecting a drive position.
The bus connection is via the PT-CAN2 and additionally via a local CAN to the
electronic transm
Concept
The rearview camera provides assistance in
parking and maneuvering backwards. The area
behind the vehicle is shown on the Control Display.
Safety information
Warning
The system cannot serve as a substitute for the
driver's personal judgment in assessing the
traffic conditions. There is a ris