Saab 9000 (1985-1998) Rear Suspension Control Arm & Brace Guide

Symptoms of a Failing Rear Suspension Arm or Brace

The rear suspension on the Saab 9000 is robust, but the rubber bushings that isolate the arms and braces from the chassis are common wear items. When these bushings fail, you'll notice distinct changes in how the car drives and sounds.

1. Clunking or Knocking Noises from the Rear

This is the most common symptom. A worn bushing allows for metal-to-metal contact, creating a clunking or thudding sound when you drive over bumps, accelerate, or brake. The sound is often described as a loose component shifting in the back of the car. This noise can come from worn trailing arm bushings or the bushings on the Panhard rod (cross stay).

2. Unstable Steering and Rear End 'Wander'

If the bushings on the Panhard rod (cross stay) are worn, the rear axle can shift from side to side. This makes the car feel unstable, especially at highway speeds or when changing lanes. You might feel the rear of the car 'steering' itself, forcing you to make constant small corrections with the steering wheel to keep the car going straight. This is a serious safety concern.

3. Uneven Rear Tire Wear

When the rear axle is no longer held firmly in place, the alignment of the rear wheels is compromised. This can lead to accelerated and uneven tire wear, often on the inside or outside edges of the tires. If you notice your rear tires are wearing out much faster than they should, a worn suspension component is a likely cause.

4. Excessive Vibration

Worn bushings can no longer effectively absorb road vibrations. This can lead to a general increase in vibration felt through the floor and seats, particularly at higher speeds. While other issues can cause vibrations, it's a common secondary symptom of failing control arm or brace bushings.

Buying a Used Saab 9000 Rear Suspension Component

Given the age of these vehicles, finding new OEM parts can be difficult and expensive. A quality used OEM component is often a practical and reliable choice, especially since the steel arms themselves rarely fail. The key is to inspect the part thoroughly.

What to Inspect on a Used Part

• Check the Bushings: This is the most critical inspection. The rubber should be firm, without major cracks, tearing, or signs of fluid contamination. If the rubber is crumbling, completely separated from the metal sleeve, or feels mushy, the part will need new bushings pressed in before installation.
• Inspect for Bends and Damage: Look down the length of the arm or brace. It should be perfectly straight. Any signs of bending, heavy scraping, or collision damage are red flags. A bent arm will make alignment impossible.
• Check for Rust: Surface rust is normal for a part of this age and is usually not a concern. However, you should reject any part with heavy, flaking rust or rust that has caused pitting and thinning of the metal, especially around the welds and bushing housings.
• Verify Part Numbers: While many rear suspension parts are interchangeable across the 1985-1998 model years, it's always best to match part numbers if possible. The main cross stay (Panhard rod) is listed under part numbers 400102141 and 8952046.

Known Issues, Recalls, and TSBs

The Saab 9000 was not subject to any specific recalls for its rear control arms or braces in the North American market. Most issues are related to age and wear, particularly the deterioration of rubber bushings. No technical service bulletins (TSBs) directly address control arm failure, as it is considered a standard wear-and-tear repair. The primary known issue is simply the eventual failure of the bushings, leading to the symptoms described above.

Cost & Replacement Info

Replacing a rear suspension component on a Saab 9000 is a common DIY task for those with some mechanical experience and the right tools.

Part Cost Comparison

Frequently Asked Questions (FAQ)