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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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
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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
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Turn signal, high beams,
headlight flasher
Turn signal
Turn signal in exterior mirror
When driving and during operation of the turn
signals or hazard warning system, do not fold in
the exterior mirrors, so that the signal lights on
the exterior mirror are easy to see.
Using turn signals
Press the lever past the resistance point.
Triple turn
Lights and bulbs
General information
Lights and bulbs
Lights and bulbs make an essential contribution
to vehicle safety.
Some items of equipment use light-emitting diodes
installed behind a cover as a light source.
These light-emitting diodes are related to conventional
lasers and are officially designated as
Clas
