How To Replace A Subaru Legacy Power Steering Pump

If you hear strange noises while steering, and/or notice a loss of power steering, it’s likely that your power steering pump is bad and needs to be replaced. Once you confirm that you’ve got a failing power steering pump using this diagnostic process, you should replace it right away. Your Subaru will eventually lose its power steering. If this happens at the wrong time, it could cause a serious accident on the road.

Why Do It Yourself?

Subaru Legacy Power Steering Pump On Car

Image Credit: ace88bull

Replacing your power steering pump sounds like a complicated project. But it’s actually not if you have basic tools, a couple of hours, and some familiarity with the parts under the hood.

It’s much cheaper to do it at home because:

  • Shops charge about $100/hour in labor, which may be more than how you value your own time.
  • Shops mark up the prices of their OEM replacement parts by about 30%. If you do it at home, you can order a genuine OEM replacement power steering pump online from a reputable seller like

Finding The Right OEM Replacement Power Steering Pump For Your Legacy

New OEM Subaru Legacy Power Steering Pump

Each OEM replacement part has a unique part number assigned to it. To find the right part number for your Legacy, you can look up your car in our database. Or, check out this list of our top selling power steering pumps for Legacy models:

  • Part No. 34430AG03B: For 2005-2009 Legacy models with a 2.5L engine
  • Part No. 34430AE04C: For 2002-2004 Legacy models with a 2.5L engine
  • Part No. 34430AG0119L: For 2008-2009 Legacy models with a 3.0L engine
  • Part No. 34430AE04A: For 2000, 2001, and 2004 Legacy models with a 2.5L engine

How To Replace Your Power Steering Pump

Before we start, we wanted to note that this list of steps is specifically for any Subaru with a 2.5L engine. If you have a Legacy with a 3.0-3.6L engine, the steps may differ slightly.

  1. Disconnect the battery.
  2. Remove the air intake scoop.
  3. Remove the alternator belt.
  4. Siphon off enough coolant from the radiator to give you some room to lift up the main coolant hose in order to reach the power steering pump.
  5. Unscrew the three bolts around the power steering pump and then remove the pump. The last bolt on the back of the pump is hard to get to, but you can get to it with a swivel joint.
  6. Remove the power steering pump from the engine bay.
  7. Take the sensor, mounting bracket, and pulley off the old power steering pump and then put these components on the new pump (if necessary.)
  8. Install the new power steering pump in the reverse order as described above.

Please contact us if you have any questions or if you need assistance with anything.