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Suspension Control Arm
This photo shows the same type of part you'll receive. Since each used part has its own wear and scratches, yours may look slightly different. Check the product notes for details about the condition of this specific part.

2003 - 2008 BMW Z4 Control Arm - Lower Rear, Left (Driver) (OEM)

Only 1 left in stock
$58.95

ℹ️ Product Notes

This is a used part. This is the rear lower control arm assembly.

This is the lower arm that supports the rear spring. It is designed to bend on impact to protect the frame. Fits the driver side (left).
Condition: Excellent (A)
Like new, minimal to no wear
23,359 miles
Odometer reading when part was removed
See Other BMW Z4 Suspension Control Arms
SKU #
946394-L88595-315

Why Buy Used OEM Parts?

✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested to ensure it meets our quality standards. While it may show some cosmetic wear from previous use, it's fully functional and ready to install.

✓ Original Equipment: This is a genuine OEM (Original Equipment Manufacturer) part - the exact same part that came with your vehicle from the factory. It's designed specifically for your make and model, ensuring perfect fitment and performance.

✓ Works Like New: Despite some visual wear, this part will perform just as well as a brand new one. The internal components and functionality are intact, giving you the same reliability you'd expect from OEM quality.

✓ Significant Savings: Save 50-80% compared to buying new! Used OEM parts offer exceptional value - you get factory quality at a fraction of the cost. It's the smart choice for budget-conscious vehicle owners who won't compromise on quality.

✓ Risk-Free Purchase: We stand behind our used parts with a generous 6-month warranty, 30-day returns, and 100% money-back guarantee. If it doesn't work out for any reason, simply return it for a full refund. You have nothing to lose!

🛡️ 30-Day Returns + 6-Month Warranty - Buy with Confidence!

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Vehicle Fitment Guide

This part fits the following vehicles:

BMW
Z4 2003-2008 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
2.5i Convertible 2003 - 2006 L6 2.5L RWD | Automatic & Manual
3.0i Convertible 2003 - 2006 L6 3.0L RWD | Automatic & Manual
Coupe 3.0si Coupe 2006 - 2008 L6 3.0L RWD | Automatic & Manual
M Coupe Coupe 2006 - 2008 L6 3.2L RWD | Manual
M Roadster Convertible 2006 - 2008 L6 3.2L RWD | Manual
Roadster 3.0i Convertible 2006 - 2008 L6 3.0L RWD | Automatic & Manual
Roadster 3.0si Convertible 2006 - 2008 L6 3.0L RWD | Automatic & Manual
2.5si Convertible 2007 - 2008 L6 2.5L RWD | Automatic & Manual
3.0si Convertible 2007 - 2008 L6 3.0L RWD | Automatic & Manual
2004 - 2005

⚠️ Important: Please verify your vehicle's year, make, model, and specifications before ordering. If you're unsure about fitment, contact our customer service team for assistance.

Policies

Shipping & Handling

  • Standard shipping: 3-7 business days via UPS Ground
  • Parts are carefully packaged to prevent damage during transit

Returns (30 Days)

We accept returns within 30 days of delivery for this part.

  • Defective parts: We will replace the part or issue a refund at our discretion
  • Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
  • Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
  • Return shipping: We cover return shipping as part of our 100% money-back guarantee
  • Parts must be returned in original packaging and unmodified condition
  • Poorly packaged returns that arrive damaged will not be credited

6-Month Warranty

All used parts include a 6-month warranty from the date of purchase.

  • If your part fails within 6 months, we will send a replacement
  • Refunds are only issued if we cannot provide a suitable replacement
  • Warranty covers defects — not installation errors, misuse, or damage after installation

Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.

Damaged in Shipping?

If your part arrives damaged:

  • Stop immediately — do not install the part
  • Keep all original packaging and boxes
  • Take clear photos of the damage and packaging
  • Contact us within 48 hours of delivery

We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.

Order Cancellation

Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.

Symptoms & Diagnosis

Warning signs the Rear Lower Control Arm is failing:

  • Clunking or rattling noises coming from the rear suspension, especially when going over bumps.
  • Uneven tire wear on the rear tires.
  • Vague or unstable handling, especially when cornering.
  • The rear of the car feels loose or wanders.
  • Visible damage to the control arm, such as bending or cracking.

How to test if this part is the problem vs other components:

  1. Visual Inspection: Carefully inspect the control arm for any signs of damage, like bends, cracks, or excessive rust. Also, check the bushings (rubber parts) for wear, cracking, or separation.
  2. Movement Test: With the car safely supported, try to move the control arm by hand. Excessive play or looseness indicates a problem.
  3. Pry Bar Test: Use a pry bar to gently apply pressure to the bushings. Look for excessive movement or separation.
  4. Listen Carefully: Have someone rock the car while you listen for noises coming from the suspension.

Common failure causes for this part:

  • Normal wear and tear over time.
  • Impact damage from potholes or accidents.
  • Corrosion due to road salt and moisture.
  • Deterioration of the rubber bushings.

Buyer's Checklist

What to look for when buying this part:

  • Check for signs of damage, like cracks or bends.
  • Make sure the bushings are in good condition.
  • Verify the part is for the left (driver's) side of your car.

Quality indicators for the available options:

FeatureUsed OEMNew Aftermarket
OriginOriginal part from the manufacturerManufactured by a third-party company
QualityTypically high, designed to OE specsVaries, can be equal to or lower than OEM
PriceGenerally lower than new aftermarketCan be competitive with used OEM
InspectionShould be inspected for damage/wearNew condition
WarrantyVaries by sellerTypically offered by manufacturer

What's typically included with the part:

  • The control arm itself.
  • Bushings (already installed).
  • Sometimes, a ball joint (check the product description).

Installation Overview

Difficulty level and estimated time:

  • Difficulty: Moderate
  • Estimated Time: 1-3 hours

Special tools needed (if any):

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

Critical steps and tips:

  1. Loosen the lug nuts on the wheel.
  2. Raise the vehicle and securely support it with jack stands.
  3. Remove the wheel.
  4. Disconnect any sensors or lines attached to the control arm.
  5. Loosen and remove the bolts securing the control arm to the vehicle.
  6. Install the new control arm, tightening the bolts to the manufacturer's specified torque.
  7. Reconnect any sensors or lines.
  8. Reinstall the wheel.
  9. Lower the vehicle.
10. Torque the lug nuts to the correct specification.

Whether DIY is recommended or professional installation is better:

  • DIY is possible for experienced mechanics.
  • Professional installation is recommended if you're not comfortable working on suspension components.

Buying Options

Compare: Used OEM, New Aftermarket

FeatureUsed OEMNew Aftermarket
PriceGenerally lowerCan be competitive
QualityOriginal manufacturer qualityVaries by brand
ConditionUsed, but inspectedNew
WarrantyVaries by sellerTypically offered by manufacturer
AvailabilityMay be limitedUsually readily available

Used OEM: Best value - genuine factory parts, tested and inspected, at significantly lower prices.

New Aftermarket: Brand new third-party parts built to OE specs.

Typical Lifespan

How long this part normally lasts:

  • Typically 75,000 - 150,000 miles.

Factors that affect longevity:

  • Driving conditions (rough roads, potholes).
  • Climate (road salt, extreme temperatures).
  • Driving habits (aggressive driving).
  • Quality of the part.

Price Ranges

Budget vs mid-range vs premium options:

  • Used OEM: $50 - $150
  • New Aftermarket: $75 - $250

Labor cost considerations if applicable:

  • Professional installation: $100 - $300

Total job cost estimates:

  • DIY (Used OEM): $50 - $150 (part only)
  • DIY (New Aftermarket): $75 - $250 (part only)
  • Professional Installation (Used OEM): $150 - $450 (part and labor)
  • Professional Installation (New Aftermarket): $175 - $550 (part and labor)

Vehicle-Specific Notes

Known issues for this vehicle's system related to this part:

  • The rear suspension on these models is known to be susceptible to wear and tear, especially the bushings in the control arms.
  • Rust can be a problem in areas with road salt, which can weaken the control arms.

Any TSBs or common complaints:

  • Check online resources for any Technical Service Bulletins (TSBs) related to rear suspension issues on your specific model year.

Verification After Install

How to confirm proper operation:

  • Test drive the vehicle on a variety of road surfaces.
  • Pay attention to any noises, vibrations, or handling issues.

What to look/listen for to verify it's working correctly:

  • No clunking or rattling noises from the rear suspension.
  • Stable and predictable handling.
  • Even tire wear.
  • Vehicle tracks straight.

FAQ

Q: How do I know if my rear lower control arm is bad?
A: Common signs include clunking noises, uneven tire wear, and poor handling.

Q: Can I replace just the bushings on the control arm?
A: Yes, but it can be difficult and may require special tools. Replacing the entire control arm is often easier.

Q: Is it safe to drive with a bad rear lower control arm?
A: It is not recommended. A damaged control arm can affect handling and braking, making it unsafe to drive.

Q: How important is it to get a wheel alignment after replacing the control arm?
A: Very important. Replacing a control arm can change the suspension geometry, which can cause uneven tire wear and poor handling if not corrected with a wheel alignment.

Q: Should I replace both rear lower control arms at the same time?
A: While not always necessary, it's often recommended to replace them in pairs to ensure balanced handling and prevent future problems.

Part Specifications

OEM Part Numbers:

  • BMW: 33321092237, 33321094889, 33321138380, 33326770813, 33326781625

Fits Years: 2003 2004 2005 2006 2007 2008

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