Complete Suspension Parts List for a 2001 Buick LeSabre

If you own a 2001 Buick LeSabre, the suspension system is critical to ride comfort, handling, and safety. Over time, bushings wear, shocks leak, and ball joints loosen. This article provides a complete suspension parts list for the 2001 Buick LeSabre, covering front and rear components, steering links, and related hardware. Use it to identify what needs replacement and how to choose the right parts.

Front Suspension Components

The front suspension on the 2001 LeSabre uses a MacPherson strut design with control arms, sway bar, and steering knuckle. Here are the key parts:

Strut Assembly

• Complete Strut Assembly – Includes the strut, spring, mount, and bearing. Replacing the entire assembly is easier than rebuilding. OEM part numbers: AC Delco 501-149 (left) and 501-150 (right). Aftermarket brands like Monroe or KYB offer direct replacements.
• Strut Mount – Sits on top of the strut tower. Worn mounts cause clunking. Part numbers: AC Delco 45G00281 or Moog K90610.
• Strut Bearing – Allows the strut to rotate during steering. Often included with the mount. If not, use Moog K90610.
• Coil Spring – If your strut assembly is original, the spring may sag. Replacement springs are available from Moog or AC Delco. Part numbers vary by production date; check VIN.

Control Arms

• Lower Control Arm – The front lower control arm holds the lower ball joint and two bushings. Replace as a complete arm assembly for easier installation. OEM: AC Delco 45G25694 (left) and 45G25695 (right). Aftermarket: Moog RK6246 (left) and RK6245 (right).
• Lower Control Arm Bushing – If you keep the original arm, press-in bushings are available: Moog K200109 (front) and K200110 (rear). However, corrosion often makes removal difficult; a full arm assembly is recommended.
• Upper Control Arm – The 2001 LeSabre has an upper control arm with a ball joint and bushing. Part numbers: AC Delco 45G24480 (left) and 45G24481 (right). Aftermarket: Moog RK6248 (left) and RK6247 (right).

Ball Joints

• Lower Ball Joint – Pressed into the lower control arm. If the control arm is replaced, the ball joint comes pre-installed. Separate ball joints: Moog K6435 (left) and K6434 (right).
• Upper Ball Joint – Integral with the upper control arm; replace the whole arm.

Sway Bar and Links

• Front Sway Bar – Diameter 1.125 inches. The bar itself rarely fails, but bushings do.
• Sway Bar Bushings – Where the bar mounts to the frame. Part number: Moog K90198 (set of 2).
• Sway Bar End Links – Connect the bar to the strut. Worn end links cause clunking over bumps. OEM: AC Delco 45G22433. Aftermarket: Moog K90306 (front pair includes grease fittings).

Steering Components

• Inner Tie Rod End – Connects to the rack. Part: Moog DS1399 (left) and DS1400 (right).
• Outer Tie Rod End – Connects to the steering knuckle. Part: Moog DS1401 (left) and DS1402 (right).
• Steering Rack Boot – Protect the rack from dirt. If torn, replace during tie rod work. Part: Moog K90496.

Wheel Bearings and Hub Assembly

• Front Hub Assembly – The 2001 LeSabre uses a sealed bearing hub assembly. Worn bearings cause grinding or noise. Part numbers: Timken HA590012 (left) and HA590013 (right). Also available from AC Delco and SKF.

Rear Suspension Components

The rear suspension is a semi-independent beam axle with trailing arms, coil springs, and shocks. Here’s what you may need:

Shock Absorbers

• Rear Shocks – Replace in pairs. OEM: AC Delco 580-467. Aftermarket: Monroe 37062 (OESpectrum) or KYB 344443 (Gas-a-Just).

Coil Springs

• Rear Coil Springs – Support the rear weight. Saggy springs cause low ride height and poor handling. Part numbers: Moog 85160 (standard duty) or Moog CC85160 (variable rate). Check load rating for your model (standard or heavy-duty).

Trailing Arms

• Rear Trailing Arm – There are two per side (upper and lower). The upper trailing arm has a bushing at each end; the lower arm has one bushing at the axle and one at the frame. Worn trailing arm bushings cause wheel hop and vague handling. Complete arms: AC Delco 45G25590 (upper right), 45G25591 (upper left), 45G25592 (lower right), 45G25593 (lower left). Aftermarket: Moog RK6420 (upper) and RK6421 (lower).

Sway Bar

• Rear Sway Bar – Diameter 0.75 inches. Bushings and links may wear.
• Rear Sway Bar Bushings – Moog K90199 (set of 2).
• Rear Sway Bar End Links – Moog K90387 (pair).

Wheel Bearings

• Rear Wheel Bearings – The LeSabre uses a separate bearing and seal pressed into the drum or disc hub. For drum brakes: Timken SET3 (bearing) and seal 1960. For disc brakes: Timken 510009 (bearing) and seal 1960. Check your vehicle’s build date for correct brake type.

Steering and Alignment Hardware

Steering Knuckle

• The front steering knuckle connects the strut, lower control arm, and wheel bearing. It rarely needs replacement unless bent in an accident.

Alignment Components

• Camber Bolts – If your shop cannot align the front camber, eccentric cam bolts (e.g., Moog K9690) allow adjustment.
• Toe Adjuster Sleeves – On the inner tie rod; not typically replaced unless damaged.

Additional Hardware

• Stabilizer Bar Brackets – Metal brackets that hold the sway bar in place. Corrosion can weaken them. Part: Moog K90766 (front) or K90767 (rear).
• Control Arm Bolts and Nuts – Often rusted and non-reusable. Use OEM or grade 8 hardware.
• Grease Fittings – Aftermarket ball joints and tie rods come with grease fittings; use a quality grease gun.

Practical Tips for Buying Suspension Parts

• OEM vs Aftermarket: OEM parts (AC Delco) match factory specs exactly but cost more. Aftermarket brands like Moog, Monroe, and KYB offer improved designs with grease fittings and better bushings.
• Replace in Pairs: Shocks, struts, ball joints, tie rods, and springs should be replaced on both sides for balanced performance.
• Consider Assemblies: Complete strut assemblies and control arms save labor time and avoid pressing bushings.
• Check VIN: Some parts vary by model year and trim (e.g., base vs. Limited). Use your VIN or build date when ordering.
• Hardware: Always replace nuts and bolts that are rusted or torque-to-yield (e.g., lower control arm bolts).

Final Recommendation

For most 2001 Buick LeSabre owners, a full front-end refresh should include: complete strut assemblies, lower control arms (with ball joints), outer tie rod ends, and sway bar end links. For the rear, replace shocks and inspect trailing arm bushings. If the car has high mileage (over 150,000 miles), plan to replace all worn bushings and ball joints. Stick with quality brands like Moog or AC Delco for durability. After suspension work, get a professional alignment to ensure even tire wear and proper handling.