When to replace Subaru Forester shocks?

Shocks and struts should be replaced when damping performance fades or leaks appear; there is no universal mileage, but many Forester owners find replacement is needed roughly between 60,000 and 100,000 miles depending on terrain and driving style.

As Forester models age and accumulate miles, wear can accumulate unevenly. This article outlines the signs of wear, how to inspect the suspension, factors that influence timing, and what to expect in terms of replacement options and costs.

Key signs that a replacement is due

Watch for telltale indicators that damping is fading or moisture has leaked from the units.

• Visible fluid leaks on the shock or strut body


• Excessive bouncing or a floaty ride after hitting bumps


• Nose-diving during braking or reduced steering stability


• Uneven tire wear or noticeable sag in ride height


• Long braking distances or reduced cornering precision


• Clunks, squeaks, or rattles when driving over rough pavement

If multiple signs appear, schedule a professional inspection to determine whether replacement is necessary.

How to inspect and test the suspension

Perform these checks to gauge damping performance and mounting integrity before deciding on replacement.

1. Visually inspect front struts and rear shocks for leaks, dents, or damaged mounts


2. Conduct a bounce test: press down firmly on each corner and release; a good damper should stop bouncing quickly


3. Assess ride height and tire wear for abnormal sag or uneven wear patterns


4. Listen for unusual noises when traversing potholes or speed bumps


5. Have a shop perform a damping test with appropriate equipment if available

Note that on most Foresters, front components are struts with springs, while the rear uses shocks; replacements may involve complete assemblies in some generations. An alignment is often recommended after suspension work.

What factors influence replacement timing

Several variables affect when you should replace shocks or struts, beyond simple mileage.

• Driving conditions: rough roads, potholes, and off-road use accelerate wear


• Vehicle load and towing: frequent heavy loading stresses components more than normal use


• Climate and road salt: corrosive environments can degrade mounts and hardware


• Maintenance history: timely alignments, tire maintenance, and component inspections help longevity


• Quality of parts: OEM dampers vs. aftermarket options offer different lifespans and feel


• Age of rubber bushings and mounts: aging components can compromise damping even if shocks look intact

In short, it’s not just mileage that matters—conditions and care play a large role in determining when replacement is due.

Replacement options, timing, and costs

When replacing Forester dampers, consider both function and value, and plan for a balanced repair.

• Replace in pairs: for balanced handling, replace both front struts or both rear shocks at the same time


• Front vs rear: front components are typically struts with springs; rear components are shocks; parts are not always interchangeable


• OEM vs aftermarket: OEM Subaru parts match factory damping; reputable aftermarket dampers (e.g., KYB, Bilstein, Monroe) offer alternative ride characteristics


• Budget vs performance: choose dampers that suit your driving needs, whether comfort, sportier handling, or durability


• Install and alignment: expect wheel alignment to be checked after replacement; related mounts or springs may be replaced if worn

Typical installed price ranges vary by model year and shop, but owners commonly see roughly $400–$900 per front axle (struts) and $250–$500 per rear axle (shocks), with both axles together often falling in the $700–$1,400 range. Always request a detailed quote that separates parts and labor, and confirm whether a diagnostic check or alignment is included.

Summary

For Subaru Forester owners, there is no one-size-fits-all replacement interval. Monitor for leaks, excessive bounce, braking instability, and uneven tire wear, and perform regular inspections. Replacing worn dampers in pairs helps preserve even handling and ride quality, and choosing between OEM and reputable aftermarket options depends on your priorities for comfort and performance. Plan for a professional installation and an alignment as part of a complete suspension service.

How do I know when my shocks need replacing?

You can tell you need new shocks by a variety of signs, including excessive bouncing after going over bumps, a rough ride, nose-diving when braking, body roll when cornering, leaking fluid on the shock, uneven tire wear, and unusual noises like clunking or squeaking. A simple bounce test can help diagnose the issue: if the car bounces more than once after you push down on it, the shocks may be worn.
 
This video shows some common signs of bad shocks or struts: 54s8020 AutomotiveYouTube · Jul 28, 2024
Signs to look for

• Excessive bouncing: The vehicle continues to bounce more than once after hitting a bump, pothole, or speed bump. 
• Rough or bumpy ride: You feel every little imperfection in the road, and the ride feels more jarring than usual. 
• Nose-diving: The front of the car dips down significantly when you brake hard. 
• Body roll and sway: The car leans excessively or sways when turning or changing lanes. 
• Rear squat: The rear of the car squats down when you accelerate. 

You can watch this video to see how to perform a bounce test: 46sJunky DIY guyYouTube · Jun 9, 2018
Visual and auditory checks 

• Leaking fluid: Look for oil stains or leaks on the exterior of the shock absorber itself. 
• Unusual noises: Listen for clunking sounds when you go over bumps or squeaking noises from the suspension. 
• Uneven tire wear: Check your tires for signs of "cupping" or other uneven wear patterns, which can indicate a shock absorber problem. 

Simple DIY test 
This video demonstrates how to inspect shocks and struts: 54sEngineering ExplainedYouTube · May 13, 2015

• The bounce test: Find a level spot in your car and push down firmly on one of the car's corners. Release the car and watch how it responds. A car with good shocks should settle after one bounce. If it continues to bounce two or more times, the shocks are likely worn out. 

Can shocks last 150,000 miles?

As a general guideline: - Shock absorbers/struts: 50,000 to 100,000 miles. - Control arms: 90,000 to 100,000 miles. - Ball joints: 70,000 to 150,000 miles.

At what mileage should you replace shocks and struts?

50,000 to 100,000 miles
When Should You Replace Shocks and Struts? Knowing when to replace shocks and struts will vary from driver to driver based on where they live. However, it is generally recommended to replace shocks & struts every 50,000 to 100,000 miles.

When to replace struts on a Subaru?

Signs indicating that it's time to replace your struts may include uneven tire wear, a bumpy ride, or difficulty steering. If you're experiencing any of these symptoms, it's crucial to have your struts inspected by a skilled mechanic.