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The Genuine Subaru OEM Driven Gear Bushing – 5th (Part #32378AA010) is a precision-engineered transmission component designed specifically for the Subaru WRX STI. This factory-spec bushing supports the 5th-gear driven gear within the manual transmission, ensuring smooth engagement, proper gear alignment, and long-term drivetrain integrity. Designed and manufactured to exact OEM tolerances, this is the correct replacement part for maintaining your STI's transmission performance exactly as Subaru intended.
| Subaru Part Number | 32378AA010 |
|---|---|
| Part Type | Driven Gear Bushing – 5th Gear |
| Transmission Type | Manual Transmission |
| Gear Position | 5th (Fifth) |
| OEM / Aftermarket | Genuine Subaru OEM |
| Condition | New |
This bushing is designed for the following Subaru vehicles equipped with the STI manual transmission:
| Year Range | Model | Trim |
|---|---|---|
| 2004–2021 | Subaru Impreza WRX STI | STI (All Trims) |
Always verify compatibility using your vehicle's VIN or consult your Subaru parts catalog before ordering. This is the correct replacement for Subaru part number 32378AA010.
Installation of the 5th-gear driven gear bushing requires transmission removal and disassembly. This is an internal transmission component and is not a simple bolt-on repair. Professional installation by a qualified Subaru technician or experienced transmission specialist is strongly recommended. Proper press-fitting tools and transmission assembly knowledge are required to avoid damage to the transmission case or gear set.
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