A Guide to the Rear Lateral Arm for the 1998-2005 Buick LeSabre
If the rear of your LeSabre feels loose or wobbly, a bad lateral arm could be the problem.
- A wobbly or loose feeling from the rear at highway speeds is a classic sign of a bad lateral arm on a LeSabre.
- Check your rear tires for uneven wear on the inside edge, which points to a bad lateral arm bushing.
- Always replace lateral arms in pairs (left and right) to maintain balanced handling.
- A four-wheel alignment is mandatory after this repair to prevent unsafe handling and rapid tire wear.
Is Your LeSabre's Rear End Feeling Loose?
A common complaint from 1998-2005 Buick LeSabre owners is a loose, wandering, or wobbly feeling from the rear of the car, especially at highway speeds. If you hit a bump and the back of the car feels like it's swaying, the lateral arms are a likely culprit. These arms have rubber bushings that wear out over time. When the rubber cracks or splits, the arm becomes loose, which affects stability and tire wear.
Symptoms of a Failing Lateral Arm
- Clunking or Rattling Noises: You may hear clunks from the rear suspension when driving over bumps or uneven roads. This is the sound of the loose metal arm moving around.
- Wandering or Unstable Steering: The car might feel like it's drifting or pulling to one side, requiring you to make constant small steering corrections to keep it straight.
- Uneven Tire Wear: Check your rear tires. Worn lateral arm bushings can throw off the alignment, causing the inside edge of the tires to wear out much faster than the rest.
- A "Wobbly" Sensation: Owners often describe the feeling as if the rear of the car is moving on its own after hitting a bump on the highway.
Known Issues & Recalls
There are no active recalls or common Technical Service Bulletins (TSBs) from GM for the lateral arms on the 1998-2005 Buick LeSabre. While other GM cars have had recalls for corroding rear suspension links, this specific model is not included. The main issue is simply age-related wear on the original rubber bushings.
Choosing the Right Aftermarket Part: OEM vs. Aftermarket
For a vehicle of this age, finding brand-new original equipment (OEM) parts from a GM dealer can be difficult and expensive. The most common and affordable solution is a new aftermarket lateral arm assembly.
Mevotech Brand Quality:
Mevotech is a widely available aftermarket brand for this part. Customer feedback on Mevotech is mixed, which is common for aftermarket suspension parts. Some users report that the parts are a good value and work well for daily driving. Others have experienced issues with bushings wearing out prematurely or parts having slight fitment issues that can complicate an alignment. For a daily-driven LeSabre, Mevotech is generally considered a serviceable and budget-friendly option compared to trying to source an expensive and rare OEM part.
Pro Tip: Replace in Pairs
It is highly recommended to replace both the left and right rear lateral arms at the same time. If one has failed due to age and mileage, the other is likely not far behind. Replacing them in pairs ensures balanced handling and saves you from having to do the same job twice.
Estimated Replacement Costs
The cost to replace a lateral arm depends on whether you do the work yourself or hire a professional mechanic.
| Part/Service | Estimated Cost (Per Arm) |
|---|---|
| New Aftermarket Arm (Mevotech) | $47.25 - $51.46 |
| Shop Labor | $150 - $300 |
| Wheel Alignment (Required) | $80 - $150 |
| Total Professional Job (Per Arm) | $277 - $501 |
*Cost estimates are for one side. Labor costs can vary significantly by location. A wheel alignment is required after this repair.
Frequently Asked Questions (FAQ)
Do I have to replace the whole arm or can I just replace the bushings?
While it's sometimes possible to press out the old bushings and install new ones, it's often not worth the extra labor. The cost of a complete new arm is low, and it saves time and hassle. For 2003-2005 models, finding the correct aftermarket bushings can be difficult, making a full arm replacement the most practical choice.
🎬 See how to replace the trailing arm on your LeSabre.Is a wheel alignment necessary after replacing lateral arms?
Yes, absolutely. Replacing the lateral arms will change your rear wheel alignment. You must get a four-wheel alignment immediately after the repair to ensure the car drives straight, handles safely, and doesn't destroy your new tires.
How difficult is it to replace a lateral arm myself?
This job can be challenging for a beginner. The bolts can be very rusty and hard to access. On some cars, the rear subframe must be partially lowered to get enough clearance to remove the inner bolt, as it can hit the gas tank. While some DIY guides show it's possible without lowering the subframe, it requires specific tools and patience.
🎬 Watch this lateral link replacement walkthrough for 2000-2005 models.What's the difference between a lateral arm, control arm, and trailing arm?
The terms are often used interchangeably, which can be confusing. For the 1998-2005 LeSabre's rear suspension, the part that controls side-to-side motion is most accurately called a lateral arm or lateral link. Your car has several links in the rear suspension that all work together.
Helpful Videos
Technical Specifications
The rear suspension on the 1998-2005 Buick LeSabre is an independent multi-link setup. The lateral arm is one of the links responsible for locating the wheel assembly. It features a rubber bushing at the subframe connection point and a ball joint or second bushing at the knuckle connection point.
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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