Parts for your 2006 Subaru Impreza-Power steering pump

2006 Subaru Impreza Power-Steering Pump

Based on the Subaru Factory Service Manual for the 2006MY Impreza/WRX/STI (Steering section), the Subaru Technical Information System, and Subaru’s FAST electronic parts catalogue, the 2006 Subaru Impreza is fitted with a belt-driven, vane-type hydraulic power-steering pump. These sources detail the pump, reservoir, hoses and rack as the hydraulic assist system used across the range for that year, confirming a power-steering pump is absolutely relevant to this model.

The pump’s job is to supply hydraulic pressure so the rack-and-pinion can assist steering effort, making low-speed manoeuvres easy and keeping the wheel feel predictable at highway speeds. In day-to-day Aussie and Kiwi driving—tight parking spots, uneven roads, and long country runs—the hydraulic setup delivers that confident, consistent steering many owners expect from a GD/GG Impreza.

As part of regular servicing, it’s smart to give the pump and fluid a bit of attention. Subaru specifies power-steering fluid meeting Dexron III ATF for this generation. Fresh, clean fluid keeps the pump lubricated and quiet, and helps stave off leaks and premature wear. If the fluid looks dark, smells burnt, or is aerated/foamy, it’s time for a change and a proper bleed.

• Common signs a pump needs love: groaning or whining when turning, heavy steering at low speed, fluid leaks around the pump, reservoir or hoses, and bubbles in the fluid after driving.
• Simple maintenance tips: keep the accessory belt correctly tensioned and free of cracks, inspect the pump’s front seal and the return hose clamp for seepage, replace tired O-rings (especially the pump inlet) to cure air ingestion and cavitation noise, use only the correct fluid and bleed by turning lock-to-lock with the front wheels off the ground, without holding the wheel hard against the stops.

When replacement is due, a quality remanufactured or new pump is the go. Swap the pump, renew the O-rings, fit a fresh belt if it’s marginal, flush the old fluid, and bleed thoroughly. A quick recheck after a few kilometres for any weeping or belt chirp closes the loop. Look after the pump and the Impreza’s steering will stay light, accurate and drama-free.

What fluid should a 2006 Impreza use in the power steering?

For this model year Subaru specifies power-steering fluid meeting Dexron III ATF. Sticking to the correct spec helps prevent noise, seal swell, and premature pump wear. Avoid mixing fluids, if uncertain what’s in there, flush and refill.

How can someone tell if the power-steering pump is failing?

Classic clues are a whining or groaning noise that rises with engine speed when turning, heavier-than-normal steering at low speeds, and visible leaks. If the fluid is foamy, the pump may be drawing air through a tired inlet O-ring or loose clamp.

Do these pumps need regular fluid changes?

Yes. While many owners overlook it, periodic fluid replacement keeps the pump and rack healthy. If the fluid is discoloured or smells burnt, change it. Many workshops treat it like brake fluid—renew proactively to extend component life.