Complete Guide to 2000 Subaru Impreza Outback Sport Rear Suspension Parts

The rear suspension of your 2000 Subaru Impreza Outback Sport is a key component for ride quality, handling, and safety. Over time, parts wear out and need replacement. This guide covers the essential rear suspension parts for this model, common symptoms of failure, and factors to consider when buying replacements. Whether you are a DIY mechanic or planning to have a shop do the work, understanding your options helps you make an informed decision.

Understanding the Rear Suspension System

The 2000 Impreza Outback Sport uses a rear independent suspension with MacPherson struts. This design includes strut assemblies, coil springs, control arms, lateral links, trailing arms, sway bar links, and bushings. Each part plays a role in maintaining alignment, absorbing bumps, and keeping the tires planted.

Common Signs of Worn Rear Suspension

Before buying parts, confirm that your suspension actually needs attention. Typical symptoms include:

• Clunking or knocking noises from the rear over bumps.
• Excessive bouncing or a floaty feel.
• Uneven tire wear or the car pulling to one side.
• The rear of the car sagging lower than normal.
• Rust or visible damage on struts or springs.

If you notice any of these, inspect the rear suspension components. Often, it’s a combination of parts that need replacement.

Key Rear Suspension Parts for the 2000 Impreza Outback Sport

Strut Assemblies

Struts are the central shock absorber and structural support unit. For the 2000 Outback Sport, you can buy quick-strut assemblies that come pre-assembled with a new spring, strut, and mount. This simplifies installation because you don’t need a spring compressor. Alternatively, you can buy the strut insert separately and reuse the old spring if it is in good condition. However, due to the age of the vehicle, replacing the springs at the same time is often recommended.

Coil Springs

Rear coil springs support the vehicle’s weight and determine ride height. Over time, they can sag or break, leading to a lower rear end and poor handling. OEM-style springs are designed for normal road use. If you carry heavy loads or off-road, consider heavy-duty or lift springs. Aftermarket springs can also change the ride stiffness.

Control Arms and Lateral Links

The rear suspension uses a multi-link setup. The lateral links (also called transverse links) and trailing arms connect the wheel hub to the subframe. Worn bushings on these links cause alignment issues and noise. You can buy individual arms or full kits that include bushings and ball joints. Polyurethane bushings are an option for better durability, but they can increase noise and harshness.

Sway Bar and End Links

The rear sway bar reduces body roll during cornering. End links attach the bar to the control arm. Worn end links produce a clunking sound and allow more body lean. Replacing them is inexpensive and easy. If you want a stiffer sway bar, aftermarket options are available, but the stock bar is fine for most drivers.

Bushings and Mounts

Strut mounts, control arm bushings, and subframe bushings all deteriorate with age and exposure to road salt. New bushings restore proper suspension geometry and eliminate play. Many aftermarket manufacturers offer bushing sets. For a street-driven car, rubber bushings provide a comfortable ride. Polyurethane is firmer and lasts longer but transmits more road feel.

Rear Wheel Bearings and Hubs

While not part of the suspension per se, wheel bearings are often replaced at the same time because they are pressed into the knuckle. A failing bearing creates a growling noise that changes with speed. For the 2000 Impreza, the rear hub assembly is separate from the knuckle, so you can press in a new bearing alone or replace the whole hub.

OEM vs. Aftermarket: Which to Choose?

For a 20+ year-old car, you have several options:

• OEM parts from Subaru guarantee fit and durability but are more expensive. They are ideal if you want the car to feel as close to original as possible.
• Quality aftermarket brands like KYB, Monroe, Moog, and Beck/Arnley offer reliable alternatives at a lower price. KYB struts, for example, are often OEM-equivalent. For bushings, Moog makes rubber versions that match OEM.
• Budget parts are tempting but may wear out quickly or not fit correctly. Avoid no-name brands for critical components like struts and control arms.

When mixing brands, ensure the spring rates and dampening match. A complete strut and spring set from the same manufacturer is the safest choice.

Installation Tips and Considerations

Replacing rear suspension on this car is a DIY-friendly job if you have basic tools and a spring compressor (if not using quick-struts). Here are key points:

• Safety first: Use jack stands, never rely on a floor jack alone.
• Penetrating oil: Spray all bolts with penetrating oil a day before, especially if the car has salt exposure. Rusted bolts can snap.
• Alignment: After replacing any suspension part that affects geometry (struts, control arms, lateral links), get a four-wheel alignment. Adjustable camber bolts may be needed if you lowered the car.
• Torque specs: Tighten bolts with the suspension under load (wheels on the ground) to avoid bushing pre-load. Check service manual for exact torque values.

If you are not comfortable compressing coil springs, buy quick-struts. It costs a bit more but eliminates a dangerous step.

Final Recommendation

For a 2000 Subaru Impreza Outback Sport daily driver that needs reliable rear suspension, a recommended setup is:

• Quick-struts from KYB (Excel-G) or Monroe (OESpectrum). Both are comfortable and durable.
• New rear springs only if yours are sagging or broken. Stick with OEM-height springs unless you have a specific need.
• Replace end links with Moog stabilizer bar links.
• Inspect lateral link bushings; if cracked, replace with Moog or OEM.
• New strut mounts if the old ones have play or noise.

This combination restores factory-like ride quality and handling without overspending. Buy from a reputable parts supplier or your local auto parts store, and confirm fitment for the 2000 model year (some parts also fit 1999-2001 Impreza models, but double-check differences like sedan vs. wagon sway bar sizes).

Taking care of the rear suspension not only makes the car safer but also extends the life of tires and other components. Inspect the parts regularly, and replace them before they fail completely. With the right parts and proper installation, your Outback Sport will feel like new again.