Identification Of Suspension

When performing an alignment, the suspension variant must be identified. This insures that the correct alignment specifications are used and the ride height is correct. There are numerous suspension variants, there is the standard "series" production suspension, the "low slung" sports suspension, "M Sport Package" and the "Poor Road Surface" package. The latter term is for Eastern Europe, this is not used in the US.

There are various methods for determining the suspension variant used. The following is a summary of some common models:

• E38  - The "Sports" suspension variant is identified by paint markings on the front springs or by a front sway bar diameter of greater than 21.5 mm.
• E65/E66  - There is no additional identification needed to determine suspension variant (at this time).
• E39  - There is a symbol (or code) located on the front strut assembly. There is a chart in repair instructions to match to the symbol found.
• E36  - There is an auxiliary spring located on the front strut assembly. There is a measurement that needs to be made to determine suspension variant.
• E46  - There is a symbol (or code) located on the front strut assembly. There is a chart in repair instructions to match to the symbol found.

  The following page shows the E39 suspension identification chart. Note the markings on the front strut housing below.

  Fig 1: Identifying Suspension

  Courtesy of BMW OF NORTH AMERICA, INC.