Subaru Forester Suspension Strut Mount Guide (2010-2018)
Hearing clunks or feeling vibrations in your Forester? Your strut mounts might be the cause.
- Clunking noises over bumps and steering vibrations are the most common symptoms of a bad strut mount.
- Check for rust under the front strut mount caps, a known issue covered by a Subaru TSB.
- KYB is an OEM-quality brand for this part; Monroe and Beck Arnley are solid mid-tier choices.
- Always replace strut mounts in pairs and get a wheel alignment after replacing front mounts.
Is Your Forester Making a Clunking Noise?
A common sign of a failing strut mount is noise. You might hear a clunking, knocking, or squeaking sound, especially when driving over bumps or making turns at low speeds. This noise happens when the rubber in the mount wears out, allowing metal parts to hit each other. You might also feel excessive vibrations through the steering wheel or notice that your steering feels loose or less responsive.
🎬 Watch: 5 signs of a faulty strut mount and how to fix itKnown Issue: Front Strut Mount Rust
Subaru issued a Technical Service Bulletin (TSB #05-62-18R) for some models concerning surface rust on the front strut mounts. This is caused by water getting trapped under the strut mount cap. While Subaru states this is cosmetic and doesn't affect performance, they have released an updated, better-sealing cap (Part No. 20326FL001) to prevent it. It's a good idea to check under your caps for moisture or rust and consider upgrading them.
Choosing the Right Aftermarket Strut Mount
When replacing your strut mounts, you have options besides the expensive OEM parts. High-quality aftermarket brands can offer similar or even better performance for less money. It is almost always recommended to replace strut mounts when you replace your struts. Here’s a breakdown of available brands:
Brand Quality Tiers
- Top Tier (OEM Quality or Better): Brands like KYB are often the original equipment manufacturer for Subaru. Choosing KYB means you are getting a part designed to restore the original handling and ride quality of your Forester. They are considered a benchmark for quality.
- Mid-Grade (Reliable Aftermarket): Monroe is a well-known brand that produces durable replacement parts designed to reduce noise and vibration. While some users have had good experiences, others suggest avoiding them, indicating some potential for inconsistent quality compared to OEM or KYB. Beck Arnley is known for sourcing parts from various manufacturers, often including OEM suppliers, making them a generally reliable choice that matches original form and function.
- Economy (Budget-Friendly): DEA products are a budget-friendly option. While they can be a good value, some users on forums report mixed reviews regarding longevity and fit, with some needing to modify parts to fit correctly.
| Brand Tier | Part Price (Single Mount) | Notes |
|---|---|---|
| Top Tier (e.g., KYB) | $75 - $95 | Often OEM supplier, matches original performance. |
| Mid-Grade (e.g., Monroe, Beck Arnley) | $65 - $85 | Good balance of quality and price. |
| Economy (e.g., DEA) | $60 - $70 | Most affordable, but quality can be inconsistent. |
Pro Tip: Always replace strut mounts in pairs (both front or both rear) to ensure even handling and suspension performance. Also, an alignment is necessary after replacing front strut mounts to prevent uneven tire wear.
Frequently Asked Questions (FAQ)
Do I need to replace the whole strut assembly or just the mount?
If only the mount has failed, you can replace just that part. However, it requires a special tool (a spring compressor) to do safely. If your struts are also old or leaking, replacing the complete strut assembly is often easier and safer for DIYers and ensures all components are new.
Were there any recalls for the 2010-2018 Forester suspension?
There were no recalls specifically for the strut mounts on 2010-2018 Foresters. A recall for the 2019 model year involved loose rear stabilizer bracket bolts, which could cause a rattling noise. There was also a TSB for the 2014-2018 Forester regarding a front control arm bushing design flaw, which could cause a vibration.
Can I install a strut mount myself?
Yes, but it is a job for an experienced DIYer. The most dangerous part is compressing the coil spring. If you are not comfortable using a spring compressor, it is safer to buy a complete strut assembly or have a professional mechanic do the job. Letting the knuckle fall forward during removal can also damage the CV axle.
🎬 See this walkthrough on replacing front strut and spring assembliesWhat is the difference between front and rear strut mounts?
Front strut mounts include a bearing that allows them to pivot with the steering wheel. Rear strut mounts do not have this bearing as the rear wheels do not turn. They are simpler in design but serve the same purpose of connecting the strut and absorbing vibrations.
🎬 Watch: How to replace rear shock and spring assembliesHelpful Videos
Technical Specifications
OEM Part Numbers: 20320FG002 20370FG012 20326FL001
The front strut mount for the 2010-2018 Forester incorporates a bearing to allow for steering pivot. The rear mount does not have a bearing. An updated front strut mount cap (20326FL001) is available to prevent water intrusion and rust.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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