For BMW 525i 528i 530i 545i 550i M5 Front Left Lower Rearward Control Arm

Introduction:
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Fit For:
BMW 525i 2004 - 2007 All Models
BMW 528i 2008 - 2010 All Models
BMW 530i 2004 - 2007 All Models
BMW 545i 2004 - 2005 All Models
BMW 550i 2006 - 2010 All Models
BMW M5 2006 - 2010 All Models

Kit Part Includes
1 x Part# Control Arm - K620123

Features:
Direct replacement for a trouble-free installation
Steel,iron or aluminum construction ensures durability
Powder-coated or painted for long-lasting rust and corrosion resistance

Suspension Control Arm

Control arms are installed in pairs on the front and rear axle and connect the chassis to the wheels as part of the suspension. Therefore, they have a significant influence on the driving characteristics of the vehicle

A dynamic or a comfortable driving style? The control arms are individually adjusted to the vehicle depending on the desired characteristics. They also absorb lateral movements and forces resulting from driving off and braking

Suspension Control Arm Replacement Guideline:

A defective control arm can manifest in the following ways:

(1).Noise (squeaking, creaking, rumbling)

(2).Deteriorating driveability

(3).Increasingly woolly and imprecise steering

(4).Uneven tyre wear

Tip:If the control arm is in working order, it is possible to only replace the defective bearings and joints. However, replacing bearings, control arm bushings and ball joints can be very complex and costly

1.First lift the vehicle using a car lift, ideally a wheel-free four-post car lift. This makes it easier to correctly tighten the control arm fixing screws

WARNING:Depending on the axle design, the control arm may need to be secured against falling with a suitable device, e.g. a transmission lifter

2.Treat the fixing screws and nuts of the control arm with rust solvent and leave it to work for a few minutes so that they are easier to loosen

3.On vehicles with automatic headlight levelling, it may be necessary to detach the leveling sensor from the control arm

4.If the stabilizer is connected to the control arm, the next step is to loosen and remove the corresponding stabiliser fixing screws

5.Loosen and remove the control arm fixing screws

6.Loosen the ball joint at the steering knuckle with a suitable special tool (e.g. a puller)

7.Remove the old control arm

8.Clean the mounting flange of the ball joint pin on the steering knuckle with sandpaper and then with brake cleaner. Otherwise single rust particles can enter the new control arm joint via the ball pin, potentially leading to premature failure of the joint

9.Fit the new control arm with the supplied accessories and attach new fixing screws and nuts

10.Reattach the stabilizer and, if applicable, the leveling sensor for headlight leveling to the control arm

NOTE:Do not tighten the fixing screws and nuts in this step, otherwise the rubber mounts will twist when the suspension compresses. This would lead to undesired preloading onf the mounts

12.Tighten the fixing screws with the torque stipulated by the vehicle manufacturer

13.Lower the vehicle all the way

14.Measure the chassis and adjust if necessary

15.Check and, if necessary, adjust the headlight settings on vehicles with automatic headlight leveling where the leveling sensor is attached to the control arm

16.To conclude, test-drive the vehicle

Frequently Asked Questions

(1).What\'s the function of control arm?
The control arm connects the hub and the frame of the car. There are ball joints on the hub side and bushings on the frame side to achieve up and down instead of forward and rearward

(2).What is the significance of the control arm for the car?

(3).How to tell the quality of control arm?

Look at the materials and processing of the control arm: the materials used to control the arm, common are steel and aluminum alloy. In ordinary family cars, steel control arms are very common, and the basic appeal is to meet the strength while controlling costs. In the middle and high-end models, you will see the control arm of the aluminum alloy and the wheel bearing housing. In addition to meeting the strength of the suspension, this material can further reduce the weight and reduce the weight of the suspension spring to improve the suspension response. Improve driving performance.

(4).Do I need to replace the control arm if the bushings are worn? What is the safety risk?

(5).What is the average cost of replacing control arms?
The cost to replace control arms depend on the vehicle. Control arms cost different amounts depending on the vehicle, as well as the labor to install. Some are easy to install and take little time, while others can take several hours
1 x Part#