2009 - 2016 BMW Z4 Control Arm - Lower Front, Left (Driver) (OEM)

What to Look For When Buying:

• Check for any signs of damage, such as cracks, bends, or rust.
• Make sure the bushings are in good condition, without cracks or tears.
• Verify that the ball joint is tight and moves smoothly.
• Confirm the part is for the correct side of the vehicle (left/driver).

Quality Indicators:

• Material: High-quality steel or aluminum construction.
• Bushings: Durable rubber or polyurethane bushings.
• Welds: Strong and clean welds.
• Finish: Protective coating to prevent rust and corrosion.

What's Typically Included:

• The control arm itself.
• Bushings (usually pre-installed).
• Ball joint (usually pre-installed).
• Sometimes, mounting hardware (bolts and nuts).

Difficulty Level and Estimated Time:

• Difficulty: Intermediate
• Estimated Time: 1-3 hours per side

Special Tools Needed:

• Jack and jack stands
• Socket set
• Wrench set
• Torque wrench
• Ball joint separator (pickle fork or ball joint press)
• Wheel chocks

Critical Steps and Tips:

1. Loosen the lug nuts on the wheel before lifting the vehicle.
2. Safely support the vehicle on jack stands.
3. Disconnect any sensors or wires attached to the control arm.
4. Use a ball joint separator to disconnect the ball joint from the steering knuckle.
5. Remove the bolts holding the control arm to the vehicle frame.
6. Install the new control arm in the reverse order.
7. Torque all bolts to the manufacturer's specifications.
8. Get a wheel alignment after replacing the control arm.

DIY or Professional Installation:

• Replacing a front lower control arm can be done by a mechanically inclined DIYer. However, it requires some experience and specialized tools. If you are not comfortable working on your car's suspension, it is best to have a professional install the part. A wheel alignment is a MUST after the install.

Compare: Used OEM, New Aftermarket

| Feature | Used OEM | New Aftermarket many cases, this part is a genuine factory part that has been thoroughly tested and inspected to ensure it meets the highest standards of quality and performance.

• New Aftermarket: This option provides a brand-new, third-party part that is manufactured to meet or exceed the original equipment (OE) specifications. These parts are designed to provide a reliable and cost-effective alternative to original equipment manufacturer (OEM) parts.

• Tie Rod Ends: Often replaced at the same time as control arms, as they are also subject to wear and tear.
• Sway Bar Links: These connect the sway bar to the suspension and can wear out, causing noise and poor handling.
• Shocks/Struts: Worn shocks or struts can put extra stress on the control arms and other suspension components.
• Wheel Alignment: A wheel alignment is essential after replacing a control arm to ensure proper handling and tire wear.

Replacing these parts together can prevent repeat failures by ensuring that all suspension components are working properly and not putting undue stress on each other. Replacing worn parts together also saves on labor costs in the long run.

• The front lower control arm typically lasts between 70,000 and 100,000 miles.

Factors That Affect Longevity:

• Driving conditions (rough roads, potholes)
• Climate (exposure to salt and extreme temperatures)
• Driving habits (aggressive driving)
• Quality of the part itself

• Used OEM: $50 - $150
• New Aftermarket: $75 - $250
• Labor Cost: $150 - $300 per side
• Wheel Alignment: $75 - $150
• Total Job Cost Estimate (per side): $225 - $550 (depending on parts and labor)

• The 2006-2016 BMW 1, 3 Series, X1 and Z4 models are known to have issues with the front suspension, including premature wear of the control arm bushings. This can lead to clunking noises and poor handling.
• Some owners have reported issues with the ball joints failing prematurely on these vehicles.
• There may be Technical Service Bulletins (TSBs) related to front suspension issues on these models. Check with your dealer or a trusted mechanic for more information.

How to Confirm Proper Operation:

• Test drive the vehicle and listen for any unusual noises, such as clunking or rattling.
• Check the steering for any looseness or wandering.
• Inspect the tires for uneven wear.
• Have a wheel alignment performed to ensure proper handling and tire wear.

What to Look/Listen For:

• No clunking or rattling noises from the front suspension.
• Smooth and responsive steering.
• Even tire wear.
• Vehicle tracks straight without pulling to one side.

Q: How do I know if my control arm bushings are bad?
A: Common signs include clunking noises when going over bumps, loose steering, and uneven tire wear. A visual inspection can reveal cracks or tears in the bushings.

Q: Can I replace just the control arm bushings instead of the entire control arm?
A: Yes, you can replace just the bushings, but it often requires specialized tools and can be more time-consuming. Replacing the entire control arm is often easier and ensures that the ball joint is also in good condition.

Q: How often should I replace my control arms?
A: Control arms typically last between 70,000 and 100,000 miles, but it depends on driving conditions and other factors. Inspect them regularly for wear and tear.

Q: Will replacing the control arm fix my alignment issues?
A: Replacing a worn control arm can improve alignment, but a wheel alignment is always recommended after replacing any suspension components to ensure proper handling and tire wear.

Q: Is it okay to drive with a bad control arm?
A: Driving with a bad control arm can be dangerous and can cause further damage to your vehicle. It's best to have it repaired as soon as possible.

OEM Part Numbers:

• BMW: 31122405859, 31126763699, 31126769793, 31126770849, 31126786203

Fits Years: 2009 2010 2011 2012 2013 2014 2015 2016