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Subaru Legacy
Subaru Outback
The Subaru OEM Front Upper Spring Seat (20323AG00B) is a genuine factory replacement component designed to support the front coil spring while helping isolate road vibrations and suspension noise. Located between the coil spring and upper strut mount assembly, this often-overlooked component plays a critical role in maintaining ride quality, suspension performance, and long-term durability. It is also commonly referred to as the front upper spring insulator or upper spring seat.
Whether you're replacing worn struts, refreshing your suspension, or restoring a high-mileage Subaru, replacing aged spring seats can help eliminate unwanted noises and ensure proper spring alignment within the suspension assembly.
Unlike aftermarket alternatives, the Subaru OEM Front Upper Spring Seat is manufactured to exact factory specifications for proper fitment, durability, and performance. Designed to withstand years of suspension movement and road impacts, this component helps maintain correct spring positioning while reducing metal-to-metal contact within the strut assembly.
When replacing struts, many Subaru technicians and enthusiasts recommend inspecting or replacing related suspension wear items at the same time. A worn spring seat can contribute to suspension noise, improper spring seating, and accelerated wear of surrounding components. Subaru owners performing complete suspension refreshes often replace spring seats, strut mounts, bearings, and dust boots together for optimal results.
Part number 20323AG00B supersedes the earlier 20323AG00A design and serves as the current OEM replacement for applicable Subaru Legacy and Outback models.
Current Subaru OEM Part Number:
If you're rebuilding your suspension or replacing worn struts, don't overlook the components that keep everything operating smoothly. The Subaru OEM Front Upper Spring Seat helps restore factory ride quality, proper spring alignment, and long-term suspension reliability.
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