Power Steering Pump 21-329 for 2006-2008 Forester and 2006-2007

In this review the reviewer looked specifically at fitment, quiet operation, and value for a direct replacement steering pump. The Power Steering Pump 21-329 is intended for owners of 2006-2008 Forester 2.5L and 2006-2007 Impreza 2.5L wagons who need a like-for-like OE replacement; the single biggest reason to buy is its close interchange with OEM reference numbers so you can replace a failing unit without a complicated parts hunt. The reviewer found it straightforward to confirm fitment using the part reference and appreciated that the pump aims to restore smooth steering with reduced whining compared with a worn original.

Key Features

• OE replacement part numbers: Includes interchange references 21-329, 21329, 34430SA0019L, 34430SA020 and 34430SA0219 to simplify verification before ordering.
• Vehicle compatibility: Designed to fit 2006-2008 Forester 2.5L and 2006-2007 Impreza 2.5L wagons so buyers for those models can expect a close match to the original pump.
• Pulley included: The unit ships with the pulley installed to reduce installation steps and speed up replacement for a faster return to normal steering feel.
• Reduced whining: The pump is built to quiet common power steering noise, helping restore a smoother and quieter steering experience.
• Installation guidance: The listing recommends professional installation to avoid damage during setup and testing, which helps protect the new pump and related components.

Who It's For

This replacement is for DIY mechanics comfortable verifying OEM numbers and for independent shops that service mid-2000s Subaru Forester and Impreza 2.5L wagons. Because it references multiple OEM interchange numbers, it is a practical choice when the vehicle parts lookup confirms a match.

It is less suited for drivers who cannot confirm the required part number or who need a universal or performance steering upgrade; those buyers should consult a parts specialist or consider remanufactured units with detailed warranty coverage.

Pros & Cons

Pros

• Direct interchange references make parts matching simple and reduce ordering errors.
• Fits specified Forester and Impreza 2.5L wagons so compatibility is clear for those years.
• Customers report good fit, functionality, and value for money, with many noting easy swaps.

Cons

• Noise level is mixed in user reports, with some finding it slightly noisier than OEM in a few cases.

Specifications

Our Verdict

The 21-329 power steering pump is a sensible, cost-effective OE-style replacement for owners of the listed Forester and Impreza wagons who verify the part number first. It restores steering function with good fit and value, though buyers should accept a small chance of slightly different noise characteristics versus a factory new unit. For anyone replacing a failing pump on the specified models, it represents a practical choice when matched correctly.

Frequently Asked Questions

How do I confirm this pump fits my car?
Check your vehicle year and model against the compatible list and verify your OEM part number matches one of the interchange numbers before ordering.

Is the pulley supplied with the pump?
Yes, the unit is supplied with the pulley installed to simplify replacement and reduce assembly steps.

Can I install this myself?
Professional installation is recommended to prevent damage during setup and to ensure proper testing after fitment.