Guide to Replacing the 2009-2016 Lincoln MKS Rear Suspension Trailing Arm
Address rear-end clunks and wandering steering by understanding how to choose the right trailing arm for your Lincoln MKS.
- A clunking noise from the rear is the most common symptom of a failed trailing arm bushing.
- Aftermarket brands like Moog and Delphi offer quality replacements that can be more affordable than OEM parts.
- Replacing trailing arms in pairs is recommended for balanced handling and to prevent future repairs.
- A four-wheel alignment is required after replacement to prevent tire damage and ensure safety.
Is Your Lincoln MKS Making a Clunking Noise?
A common issue with the 2009-2016 Lincoln MKS as it ages is the failure of the rear suspension trailing arm bushings. The trailing arm itself is a sturdy piece of steel, but the rubber bushings at the mounting points wear out. When these bushings fail, they can cause a noticeable clunking or thudding sound from the rear of the car, especially when accelerating, braking, or going over bumps. 🎬 Learn how to diagnose rear suspension clunking noises yourself. You might also notice the rear of the car feels unstable or seems to wander, and you may see your rear tires wearing down unevenly.
Known Suspension Issues
While the trailing arm itself hasn't been subject to a specific recall, the related rear suspension toe links on some 2013-2016 MKS models were recalled for a risk of fracturing, which could cause a loss of steering control. This highlights the importance of inspecting the entire rear suspension when you hear any noises or feel handling issues. A bad trailing arm bushing can put extra stress on other parts, including these toe links.
Choosing the Right Aftermarket Trailing Arm
When replacing your trailing arm, you don't have to buy the expensive OEM part from a Lincoln dealer. Several reputable aftermarket brands offer quality replacements. The entire arm assembly is typically replaced, as pressing new bushings into the old arm is difficult and often not cost-effective. Here’s a look at the available brands:
- Moog: Often considered a premium aftermarket brand, Moog parts are known for meeting or exceeding original equipment (OE) standards. They sometimes feature design improvements over the factory part, like greasable fittings, though their quality can be inconsistent across different product lines. For a daily-driven MKS, Moog is generally a reliable choice.
- Delphi: As a major manufacturer of original parts for many car brands, Delphi's aftermarket components are generally held in high regard for their quality and fit. They are a dependable choice for owners who want a part that performs like the original.
- Mevotech: Mevotech offers a balance of quality and affordability. They often have different tiers of parts, so it's important to know which one you're buying. Their "Supreme" or "TTX" lines are generally better than their basic offerings. Some users report good experiences, while others have had issues with longevity, making it a brand to consider if budget is a primary concern.
Pro Tip: It is highly recommended to replace trailing arms in pairs. If the bushing on one side has failed due to age and mileage, the other side is likely not far behind. Replacing both at the same time ensures balanced handling and saves you from having to do the same job twice. Also, an alignment is necessary after replacement.
Cost to Replace a Lincoln MKS Trailing Arm
| Part Type | Part Cost (Single Arm) | Shop Labor Cost |
|---|---|---|
| New OEM (Motorcraft) | $150 - $250 | $122 - $179 |
| New Aftermarket | $52 - $98 |
Note: Costs are estimates and can vary by location and supplier. Labor cost is for a single side replacement.
Frequently Asked Questions
Do I need a wheel alignment after replacing the trailing arm?
Yes. The trailing arm is a critical part of the rear suspension geometry. Replacing it will alter your vehicle's alignment. You must have a professional four-wheel alignment performed after the repair to prevent uneven tire wear and ensure proper handling.
Can I just replace the bushing instead of the whole arm?
While technically possible, it is not recommended for a DIY repair. Removing the old bushing and pressing in a new one requires special tools like a hydraulic press. 🎬 Watch how a trailing arm bushing is professionally pressed and replaced. Given the affordable cost of a complete aftermarket trailing arm assembly, which includes a new bushing, replacing the entire unit is the faster, easier, and more reliable solution.
Is this a difficult DIY job?
For a home mechanic with the right tools, this is a manageable job. It requires safely lifting and supporting the rear of the vehicle on jack stands. You will need a good set of metric sockets, wrenches, a breaker bar for stubborn bolts, and a floor jack to support the suspension during removal and installation. The difficulty is moderate, mainly due to dealing with potentially rusted bolts.
🎬 Follow this step-by-step guide to replacing your Lincoln MKS trailing arm.What other parts should I inspect while replacing the trailing arm?
When you're working on the rear suspension, it's a good time to inspect all related components. Check the condition of the other control arms, the sway bar links, the shocks or struts for leaks, and the recalled rear toe links. Addressing other worn parts at the same time can save you from future repairs and alignment issues.
Helpful Videos
Technical Specifications
OEM Part Numbers: AA5Z-5500-A
The rear trailing arm for the 2009-2016 Lincoln MKS is a stamped steel arm with a rubber bushing pressed into one end. It connects the rear knuckle to a mounting point on the vehicle's chassis, running parallel to the direction of travel.
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.
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