Parts for your 2007 Subaru Impreza-Power steering hose

2007 Subaru Impreza Power-Steering Hose — What It Does and When to Replace It

Yes, the 2007 Subaru Impreza uses power-steering hoses. Technical references including the Subaru Factory Service Manual (2007MY Impreza, Steering/Power Assist section) and the Subaru Electronic Parts Catalogue show a belt-driven hydraulic power steering system with a high-pressure feed hose from the pump to the rack and a low-pressure return hose back to the reservoir. Aftermarket catalogues from brands such as Gates and Dayco also list dedicated pressure and return hoses for this model, confirming fitment.

On this Impreza, the power-steering hose set carries automatic transmission fluid (ATF) to create hydraulic assist, making the steering lighter and more predictable at low speeds and during parking. The high-pressure hose is a reinforced assembly that handles pump pressure, while the return hose routes fluid back to the reservoir. Together, they keep the rack lubricated, remove heat, and prevent cavitation so the pump doesn’t whine its head off on cold starts.

For servicing, it’s worth giving the hoses a look at every service or two—say each 10–15,000 km—and replacing the fluid periodically. Subaru specifies ATF for this system (commonly Dexron III for 2007 models—always check the reservoir cap and the owner’s manual). Fresh, clean fluid helps the pump and rack last, and reduces foaming and groans.

Common clues that a hose is on the way out include ATF seepage at the crimp on the pressure line, perished rubber on the return line, a chirp or whine from the pump, heavier steering, or a fine mist of red fluid on the undertray. Left unchecked, a split hose can dump fluid quickly, which can take out the pump or make the wheel feel like a gym workout.

When replacing, use flare-nut spanners, swap any copper/aluminium sealing washers on banjo fittings, and fit new clamps on the return side. Keep ATF off the belts and alternator. After installation, bleed the system: with the front wheels off the ground, cycle the steering lock-to-lock slowly with the engine off, top up, then repeat briefly with the engine running until bubbles vanish and the fluid stays clear. Many techs also replace the pump inlet O-ring to cure cold-start aeration. A quality aftermarket hose is fine, but OEM fit and routing clips make life easier and reduce chafe.

• Inspect hoses and clamps regularly for dampness or cracks
• Use the correct ATF, don’t mix fluid types
• Bleed thoroughly to avoid pump whine and foaming

Popular questions about 2007 Subaru Impreza power-steering hoses

What fluid does the 2007 Impreza use for power steering?
Subaru specifies ATF in the power-steering system for this model year, commonly Dexron III. The reservoir cap and owner’s manual confirm the exact spec. Using the right ATF keeps seals happy and reduces pump noise.

What are the signs a power-steering hose is failing?
Look for red ATF drips, damp hose crimps, a whine on cold start, heavy steering at low speed, or bubbles in the reservoir. A burnt-fluid smell after a drive can also point to fluid hitting a hot exhaust shield.

How much time and cost to replace a hose?
Typically 1–2 hours for the pressure hose on a driveway or in a workshop, less for the return line. Part prices vary: a quality aftermarket pressure hose is often in the mid-hundreds (AUD/NZD), with OEM higher. Fresh ATF and new washers/clamps add a small amount.