Rear Suspension Parts Blowout 2006 Outback: What to Replace and How to Choose

If your 2006 Subaru Outback is riding rough, bottoming out, or making clunking noises from the rear, a suspension blowout could be the cause. "Blowout" typically refers to a catastrophic failure of a component—like a snapped coil spring, blown shock absorber, or torn bushing. The 2006 Outback, especially with higher mileage, is prone to these issues. This guide covers the most common rear suspension parts that fail, how to identify them, and what to consider when replacing them.

Understanding Rear Suspension Blowout on a 2006 Outback

The rear suspension of the 2006 Subaru Outback is a multi-link independent setup. Over time, rubber bushings dry out, shocks lose their damping, and springs can fatigue or even break. A blowout event can happen suddenly (e.g., hitting a pothole) or gradually as wear accumulates. Either way, ignoring it leads to poor handling, uneven tire wear, and safety risks.

Signs of a Blowout

• Rear end sagging or leaning: One side lower than the other.
• Clunking or rattling: Especially when going over bumps.
• Bouncing: The car continues to bob after a bump.
• Uneven tire wear: Cupping or scalloping on rear tires.
• Poor steering response: The rear feels loose or wanders.

If you notice any of these, inspect the following components.

Critical Rear Suspension Parts That Fail

Rear Shock Absorbers

Shocks control spring oscillations. A blown shock leaks fluid, loses damping, or fails completely. On the 2006 Outback, the rear shocks are often replaced around 80,000–100,000 miles. Symptoms include excessive bouncing, fluid residue on the shock body, and a bouncy ride. When replacing, consider upgrading to gas-charged shocks for better stability.

Coil Springs

Coil springs support the vehicle's weight. A broken spring—often caused by corrosion or fatigue—can cause the rear to sag or make a scraping noise. The 2006 Outback's rear springs are known to snap, especially in rust-prone areas. Always replace springs in pairs (both rear) to maintain ride height and balance.

Control Arms and Bushings

The rear lower control arms and trailing arms have bushings that deteriorate. Worn bushings cause clunking and vague handling. Complete control arm assemblies (with pre-installed bushings) save time compared to pressing in new bushings. For a 2006 Outback, polyurethane bushings offer longer life but a firmer ride.

Sway Bar Links and Bushings

The sway bar reduces body roll. Links connect the sway bar to the control arm. Worn links click or clunk during turns. Sway bar bushings (where the bar mounts to the chassis) can also wear. These parts are inexpensive and easy to replace.

Trailing Arms

Trailing arms locate the rear wheels front-to-rear. Their bushings can tear, leading to rear-end instability. On the 2006 Outback, trailing arm bushings are a common wear item. Replacing the entire arm may be easier than pressing in bushings.

Choosing Replacement Parts

OEM vs. Aftermarket

Original Equipment Manufacturer (OEM) parts from Subaru ensure exact fit and performance. But they are more expensive. Quality aftermarket parts can be just as good for a lower price. Brands like KYB, Monroe, Moog, and Beck/Arnley are reputable for suspension components on the 2006 Outback. Avoid no-name cheap parts—they often fail prematurely.

Quality Brands to Consider

• KYB: Excellent shock absorbers (Excel-G or Gas-a-Just).
• Monroe: Good budget-friendly shocks and struts.
• Moog: Reliable for control arms, sway bar links, and bushings.
• ACDelco: Makes quality springs and suspension parts.

For coil springs, Lesjöfors or Moog are trusted. Always check that the parts are designed for the 2006 Outback (including possible variations like Outback LL Bean or H6 models).

Practical Steps for Replacing Rear Suspension Parts

Replacing rear suspension components on a 2006 Outback is intermediate-level work. You'll need jack stands, a floor jack, basic hand tools, and possibly a spring compressor for coil springs.

1. Safety first: Secure the vehicle on jack stands. Chock front wheels.
2. Remove the wheel to access components.
3. Replace shocks/struts: Unbolt the top and bottom mounts. Use a spring compressor if needed. Transfer the spring to the new shock if using a quick-strut.
4. Replace coil springs: Safely compress and remove the old spring; install the new one.
5. Replace control arms: Unbolt the arm from the chassis and hub. Reinstall with new hardware.
6. Replace sway bar links: Unbolt from sway bar and control arm; install new links.
7. Torque all fasteners to spec (found in a repair manual or online).
8. Get an alignment: Any replacement affecting ride height or connection points requires a four-wheel alignment.

If you're not confident, hire a professional mechanic. Many shops specialize in Subaru suspension.

Final Recommendation

For a 2006 Outback experiencing a rear suspension blowout, start by diagnosing which part failed. Most likely, it's a shock or spring. Replace all worn parts at once to avoid repeating labor. A common cost-effective approach: buy quick-strut assemblies (shock, spring, and mount in one) from KYB or Monroe, plus Moog sway bar links and control arms if needed. Always replace in pairs and get an alignment afterward. This will restore ride quality and safety for another 60,000+ miles.