Subaru Outback Suspension Strut Bellows Replacement Guide (2000-2007)
That small, accordion-like boot on your strut is the only thing protecting it from expensive failure.
- A torn strut bellow is not an immediate safety issue, but it guarantees the strut will fail prematurely.
- Always replace bellows when installing new struts. The minimal cost of the part is cheap insurance for your new suspension.
- KYB is a trusted OEM-quality brand for Subaru suspension parts, offering a reliable fit and long life.
- This is a difficult DIY job that requires a potentially dangerous spring compressor; professional installation is recommended for most owners.
Signs of a Failing Strut Bellow
A strut bellow doesn't fail suddenly; it wears out over time. The most obvious sign is a visual inspection. Look behind your wheels at the strut assembly. You will see the large coil spring and, inside it, the strut. The bellow is the flexible, accordion-style cover over the top portion of the strut. If you see that this boot is cracked, torn, or completely split, it has failed. Often, a torn boot is discovered during a routine oil change or tire rotation.
A secondary symptom is the failure of the strut itself. If you notice oily fluid covering the strut body, hear clunking or knocking sounds over bumps, or feel the car is excessively bouncy, your strut has likely failed. In many cases, a torn bellow is the original cause of this more expensive problem.
A Torn Bellow Guarantees Future Failure
Driving with a torn strut bellow is possible, but it is not recommended. The boot is the primary defense for the strut's seal. Once it's compromised, it's only a matter of time before dirt and moisture destroy the strut, turning a small, inexpensive part failure into a much larger and more costly repair.
Choosing the Right Aftermarket Bellows
When replacing strut bellows on your 2000-2007 Outback, you are almost always doing it as part of a larger strut replacement job. The labor to access the bellow is the same as replacing the entire strut, so it makes financial sense to do them together. For this reason, choosing a quality part is important.
Brand Tiers for Your Outback
- OEM-Quality (KYB): KYB is a well-known and respected brand in the suspension world and is a known Original Equipment Manufacturer for Subaru. Choosing a KYB bellow kit is the closest you can get to the original part without going to the dealer. These kits are considered a premium aftermarket option, often including the necessary bump stop, and are known for their proper fit and durability.
- Economy (Skyward and other budget brands): Skyward is a budget-friendly aftermarket brand. While no specific reviews were found for this brand on a Subaru Outback, it falls into the economy category. These parts meet basic fitment needs and offer a low-cost alternative, but may not have the same material longevity or perfect fit as a premium brand like KYB. They are a viable option if budget is the primary concern.
Pro Tip: Replace in Pairs with Mounts
Suspension components should always be replaced in pairs (both front struts, or both rear struts) to ensure even handling and performance. When replacing your struts and bellows, it is also the perfect time to replace the strut mounts. These mounts also wear out and can cause noise or alignment issues.
Cost to Replace Suspension Strut Bellows
The cost is dominated by labor, as the entire strut assembly must be removed and disassembled. An alignment is also required after the job is complete.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Bellows (Pair) | $19.97 - $31.08 |
| Shop Labor (2-3 hours) | $250 - $450 |
| Wheel Alignment | $80 - $120 |
| Total Estimated Cost | $350 - $600+ |
Note: This table assumes you are only replacing the bellows and reusing the old struts, which is not the recommended procedure. Most costs will be part of a full strut replacement job.
Frequently Asked Questions
Can I just replace the bellow and not the whole strut?
Yes, but it's usually not economical. The labor involved is the most expensive part of the job. Since you have to take the entire strut assembly apart anyway, it is strongly recommended to install new struts at the same time, especially on a high-mileage vehicle.
Is replacing a strut bellow a DIY job?
This is an advanced DIY job. It requires removing the strut assembly and using a spring compressor to safely remove the coil spring. Spring compressors are dangerous tools that store immense energy and can cause serious injury if they slip or are used incorrectly. This job is best left to experienced mechanics with the proper tools.
Do I need an alignment after replacing strut bellows?
Yes. Any time the front struts are removed or replaced, the vehicle's wheel alignment is affected. You must get a professional alignment to ensure proper handling and prevent premature tire wear.
Are there any recalls for the 2000-2007 Outback suspension?
There are no specific recalls or TSBs for the strut bellows. However, be aware that Subaru did issue recalls for the front lower control arms on some of these vehicles due to rust in salt-belt states, which could cause them to break. It is wise to have the entire front suspension inspected.
Technical Specifications
OEM Part Numbers: 20322AA000 20372AE000
Aftermarket cross-reference parts include KYB SB103 (Front) and KYB SB102 (Rear). Bellows are typically made of durable rubber or plastic and often come packaged with a new foam bump stop.
We Have This Part in Stock
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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