Front Lower Control Arm Ball Joint Sway Bar Suspension Kit For 2008-10 BMW 528i

Warning

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.

Picture(C)

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.

Picture(D)

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.

Picture(E)

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

Picture(F)

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

While driving, the following signs may indicate a faulty sway bar stabilizer link

(1).Rattling and thumping noises on rough roads.

(2).Imprecise vehicle handling.

(3).Stronger inclination of the vehicle during cornering.

If the sway bar stabilizer link is found to be defective, it should be replaced as described below.

Picture(A)

1.Raise vehicle and remove front wheels.

Tip:Always check both stabilizer links and replace them in pairs if necessary.

2.Spray fastening nuts of the stabilizer link with rust remover and let act for a few minutes.

Picture(B)

3.Loosen the lower fastening nut of the stabilizer link at the stabilizer and remove.

Tip:If the ball stud also starts to turn, hold it with a suitable tool.

4.Press stabilizer link out of torsion bar.

Picture(C)

5.Loosen the upper fastening nut of the stabilizer link at the suspension strut and remove it.

Tip:If the ball stud also starts to turn, hold it with a suitable tool.

Picture(D)

6.Press stabilizer link at suspension strut out of bracket.

Picture(E)

7.Insert new stabilizer link at suspension strut.

Picture(F)

8.Tighten stabilizer link at suspension strut to the tightening torque specified by the vehicle manufacturer.

Tip:Secure the ball stud against twisting with a suitable tool.

Picture(G)

9.Insert new stabilizer link at stabilizer.

10.Tighten stabilizer link at stabilizer to the tightening torque specified by the vehicle manufacturer.

Tip:Secure the ball stud against twisting with a suitable tool.

Picture(H)

11.Remount the front wheels. Lower the vehicle and tighten the wheel studs to the tightening torque specified by the vehicle manufacturer.

Tip:Even if replacing the stabilizer link does not directly affect the chassis setting, we recommend checking the axle setting and adjusting if necessary after working on the suspension.

12.Conclude with a test drive.

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.

Picture(B)

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.

Note

(1).Please check the Compatible Fitment Chart above before payment making sure all the suspension parts listed on this page are compatible with your automobile.

(2).Although some parts have grease fittings, other parts are factory sealed, but do not affect the fit and quality of the parts.

(3).Please contact our customer services for targeted discount after all the items are received if you have reached any targeted discount thresholds, the terms of which is at the bottom of this page.

Any modifications to an item of any kind before contacting us will void any and all warranty coverage for this item. Please contact us before modifying the part so that we have the opportunity to correct the situation.

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.

Picture(G)

11.Now lower the vehicle until the suspension is compressed. Depending on vehicle type, load or unload the vehicle until the required height published in the specific installation instruction is reached. This is where a wheel-free four-post car lift is advantageous, as the underside of the vehicle can still be easily accessed once lowered.

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?

As an important part of the car suspension, the control arm is used to transmit the required supporting force of the wheel and to withstand all the front and rear direction stresses. It is an important safety part of the chassis system. Therefore, it requires high strength and reliability in the design. Its fatigue strength is directly related to the safety of vehicles and members.

(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.

Look at chassis protection and workmanship: Regarding chassis protection, we mainly pay attention to whether it is equipped with engine under guard, whether there is coating or cover at the bottom of the car body, whether the oil pipe is covered with a guard plate, whether the front and rear wheel arches are protected. Board or coating coverage, etc.

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

Because the weight of the car is transferred through the control arm two rubber bushings are fitted at the pivot point and bolted to the frame. Road conditions and driving habits can contribute to the wear of these bushings which will become worn and fall apart. These bushing can be inspected by raising the car up and looking for an irregular configuration of the rubber center of the bushing. Many control arms have the ball joint manufactured into the arm which will be replaced along with the control arm itself. When one control arm is worn it is highly advised to replace the opposing arm.

(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).Why should I get my tie rods inspected on a regular basis?

If you don't get your tie rods inspected on a regular basis, there are some warning signs to watch (and listen) for. If your vehicle pulls to one side while driving, or when braking, it's possible that bad tie rods may be the culprit. Your vehicle's tires will also show uneven wear on the inside and outside edge of the tire when there's a tire rod issue. However, one of the most noticeable signs of tie rods going bad will be a knocking sound coming from the front end of the vehicle when you turn into a parking space, or some other low speed, tight turning situation.

(2).Vibrations

One of the first symptoms that your tie rods are damaged or breaking is that the steering wheel will vibrate slightly. This is especially prevalent when you are speeding up or turning. This happens because the steering wheel is losing its control over the tires, causing the steering wheel to shimmy as you drive.

(3).Shaking

As the tie rods become further damaged, you will start to notice that the car itself will start to shake. This happens because the tires may start to wobble without you having full control over them. Although you should take your car into a mechanic at the first sign of tie rod problems, if you experience your car shaking you could be at risk for serious tie rod damage-which can cause accidents. Take your car into a mechanic if you experience this tie rod symptom.

(4).Wandering

If your tie rods continue to go unchecked or unfixed, the rods can completely break. This can cause you to lose all control of your car, possibly resulting in an accident. When this occurs, the car will may "wander" as you drive. At this point, the steering wheel will have no control over the tires and the tires will start moving independently, causing the car to drift while you are driving. If this happens while you are on a freeway or busy road, you and others could be at serious risk of an accident. If you experience wandering, stop your car, call a tow truck and take your car to the nearest mechanic.

Package Includes

1x Front Lower Control Arm And Ball Joint - Front Position Driver Side -K620125

1x Front Lower Control Arm And Ball Joint - Front Position Passenger Side -K620126

1x Front Lower Control Arm And Ball Joint - Rear Position Driver Side -K620123

1x Front Lower Control Arm And Ball Joint - Rear Position Passenger Side -K620124

1x Front Sway Bar End Link - Driver Side -K750027

1x Front Sway Bar End Link - Passenger Side -K750028

2x Rear Sway Bar End Link -K80472

⚠️WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.