Guide to the Rear Suspension Trailing Arm for the 2009-2015 BMW 335i xDrive
Restore your BMW's signature handling by addressing common trailing arm issues.
- A failing trailing arm causes clunking noises, unstable handling, and uneven tire wear.
- Replacing the entire arm is easier for DIY than pressing out old bushings.
- Always get a four-wheel alignment immediately after replacement.
- Torque the bolts only when the suspension is at ride height to prevent bushing damage.
Signs of a Failing Trailing Arm
The original trailing arms on the 2009-2015 BMW 335i xDrive are made of stamped steel. While durable for normal driving, the bushings can wear out, or the arm itself can bend from hitting potholes or curbs. When the trailing arm or its bushings fail, you'll notice it in how your car drives. The rubber bushings are often the first part to go, leading to metal-on-metal contact.
Common Symptoms:
- Clunking or Knocking Noises: You may hear clunking sounds from the rear of the car, especially when going over bumps, accelerating, or braking.
- Poor or Unstable Handling: The rear of the car might feel loose, disconnected, or like it's steering on its own. 🎬 Watch: How a bad trailing arm causes rear clunking and wandering. This can feel like a 'wandering' sensation, particularly during cornering.
- Uneven Tire Wear: Worn bushings can throw off the rear alignment, causing tires to wear out quickly and unevenly.
Known Issues and Recalls
As of early 2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from the NHTSA for the suspension trailing arm on the 2009-2015 BMW 335i xDrive. However, TSBs exist for other BMW models regarding suspension noises and driveline shudder on xDrive models, which are sometimes related to worn components or tire issues. Failure is typically due to age, mileage, and road conditions rather than a manufacturing defect.
Choosing the Right Aftermarket Trailing Arm
When replacing the trailing arm, you have several aftermarket options. The quality can vary, so it's important to choose a brand that fits your needs and budget. Lemforder and TRW are often considered original equipment (OE) manufacturers for BMW, offering high quality. Aftermarket brands offer a range from budget-friendly to performance-oriented.
| Tier | Brands | Quality & Notes |
|---|---|---|
| Premium Aftermarket | Moog, Delphi | Generally considered high-quality aftermarket brands. They often meet or exceed OE standards and are a reliable choice for restoring original performance and durability. Some users note Moog quality can be inconsistent for European cars. |
| Mid-Range / Value | Mevotech, Dorman | These brands offer a balance of affordability and decent quality for daily driving. While they are a cost-effective solution, they may not have the same longevity as premium brands, especially under high-performance use. |
| Economy | URO Parts | URO Parts is often a budget-friendly option. While some parts are perfectly acceptable, others have mixed reviews regarding fit and longevity. It's a viable option if budget is the primary concern, but be aware of potential quality differences. |
Pro Tip: The trailing arm is specific to the left or right side of the vehicle. Double-check that you are ordering the correct part for the side you are replacing. Also, it is highly recommended to replace them in pairs to ensure even handling and suspension wear.
Replacement Cost
The cost to replace a suspension trailing arm can vary. The part itself is relatively inexpensive, but labor can add to the total cost. Doing it yourself can save money, but it requires the right tools.
| Item | Cost Range |
|---|---|
| New Aftermarket Part | $48 - $73 |
| Shop Labor | $150 - $300 |
| Total Professional Replacement | $200 - $375 per side |
Frequently Asked Questions (FAQ)
Is an alignment necessary after replacing the trailing arm?
Yes, absolutely. The trailing arm is a critical component that affects rear wheel alignment. A full four-wheel alignment is required after replacement to ensure proper handling, prevent tire wear, and maintain vehicle safety.
Can I replace just the bushings instead of the whole arm?
Yes, but it is often not practical. The bushings are pressed into the arm and the subframe, and removing them without a special hydraulic press tool can be extremely difficult and time-consuming. For most DIY mechanics, replacing the entire arm assembly is much faster and easier.
🎬 See this step-by-step walkthrough for replacing the rear trailing arm.Should I replace trailing arms in pairs?
Yes. It is highly recommended to replace both the left and right trailing arms at the same time. If one has failed due to age or wear, the other is likely not far behind. Replacing them in pairs ensures balanced handling and predictable performance from the rear suspension.
What tools are needed for a DIY replacement?
You will need a good set of metric sockets and wrenches (specifically 18mm), a torque wrench, jack stands, and a floor jack. The bolts are often torqued tightly, so a breaker bar may be helpful. The most important step is to torque the bolts only when the suspension is loaded to its normal ride height to avoid premature bushing wear.
🎬 Watch: A quick guide to fixing rear suspension clunks.Helpful Videos
Technical Specifications
OEM Part Numbers: 33326775623 33326775624 33326796009 33326796010
The rear suspension on the E90/F30 chassis is a five-link design. The trailing arm is one of these links, typically made from stamped steel in the OEM configuration. It connects the wheel carrier (knuckle) to the chassis subframe. Aftermarket versions may be made of stronger materials like solid aluminum.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW 335i xDrive: