Rear Axle: Notes
The newly developed rear axle with the development designation "HA 5" was used for the first time in the E87 and is featured again in the E90.
It is designed as a multi-link independent rear suspension axle with 5 different link arms. The designation "HA 5" does not refer to the five links but rather represents the consecutive development designation used at BMW.
The rear axle carrier and the links are made from high strength steel.
Minor differences exist between the HA 5 versions being used on the E90 variants.
- On the AWD version the wheel carrier is modified slightly as it utilizes bigger wheel bearings.
- In all variants the rear axle transmission mounting is matched to the relevant drivetrain.