To provide a movable connection between the shock absorber and the car body, there is a top strut mounting. Thanks to the top strut mounting, the shock absorber can rotate freely in the support. At the point where the top strut is mounted, a shock absorber housing is attached to the body, providing mobility between the car body and the shock absorber. As a result, both radial and axial loads affect the bearing during operation.

Serviceable alternators provide uninterrupted supply of current, which is necessary for the operation of most automotive electrical components: ignition systems, on-board computers, and others. At the same time, the alternator maintains the battery charge. The condition and power of the alternator directly affects the reliability of the vehicle and its performance and performance.

1. 3 Convertible (E46)
2. 3 Coupe (E46)
3. Z4 Roadster (E85)
4. Z4 Coupe (E86)
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The conditions of the top strut mounting work

In addition, the TRW brand Top Strut Mounting is almost constantly exposed to abrupt loads, including shock (due to the operation of the spring), which, combined with contamination, leads to intensive wear of its components and its failure. Since the top strut mounting can be partially attributed to the steering (without it, the rotation of the rack would be impossible), then, first of all, its malfunction affects precisely the controllability. The main enemies top strut mounting remain dirt, sand and tangible shock to the suspension.