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How to Replace Battery 04-07 Subaru Impreza-WRX

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How to Replace Battery 04-07 Subaru Impreza-WRX

Created on: 2021-01-16

How to replace a dead or drained battery on 04 Subaru Impreza WRX

  1. step 1 :Removing the Battery
    • Disconnect the negative terminal with a 10mm wrench
    • Disconnect the positive terminal with a 10mm wrench
    • Loosen the 10mm bolts from the bracket
    • Remove the bracket and hold down
    • Lift the battery up and out
    • Remove the plastic tray
  2. step 2 :Installing the Battery
    • Insert the plastic tray into place
    • Place the battery on the tray
    • Insert the bracket and hold down
    • Tighten the 10mm bolts to the bracket
    • Connect the negative terminal with a 10mm wrench
    • Connect the positive terminal with a 10mm wrench

Tools needed for replacement

  • Materials, Fluids, and Supplies

    Rust Penetrant

  • Ratchets & Related

    Socket Extensions

    Ratchet

  • Sockets - Metric

    10mm Socket

  • Wrenches - Metric

    10mm Wrench

Installation Video
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Hi, I’m Mike from 1A Auto. We’ve been selling auto parts for over 30 years!

Disconnect the negative terminal to the battery using a 10 millimeter wrench to loosen it. Just have to get it loose enough to come off the terminal. Put the negative terminal aside. Lift up the protective cover on the positive terminal. Use a 10 millimeter wrench to loosen it.

When you're loosening this with your wrench, be sure to not touch anything else metal while you're touching the positive terminal. It'll cause a short and a spark, so be very careful. Just kind of protect the wrench from touching anything as you're turning it. I'm using my hand to get this loose. Put that aside.

Now remove the bracket holding the battery in. These look rusty, so I'm going to spray some rust penetrant on them. You don't need to undo these the whole way. We’ll get them loose enough and they will unhook from underneath. If you've got a deep socket long enough you could use it, a 10 millimeter. However, that's not deep enough.

I'm going to use a ratcheting wrench. You could also use a closed box wrench. Either way you need to loosen these. I'm just going to hold onto it. Again, I'm also going to be careful, too, using a longer wrench. You don't want to swing this wrench around and touch that positive terminal because it will arc and cause a spark because you're shorting it to ground. Just be aware that that terminal does have positive energy in it. Get this loose. It's almost there. I'm going to loosen the other one a little bit. Once it's loose enough, there's a little hook on the bottom I was able to push it down and unhook it. Just like that. Once one side is loose, typically you can push down the other one and work it out of there. You don't have to loosen them all the way up and out, but just enough to get the hooks undone at the bottom.

We'll lift the battery out of the car and just put it aside. Take the plastic tray out. Reinstall the plastic tray, the arrow points to the front of the car. This round part matches with the round part here. Battery will just sit on top of that and hold it down.

Reinstall the battery. Put the battery tie down back in place. So, we're installing this, we need to get that hook. There's an opening there in the plastic, you're going to reach down and you just kind of feel around for it. I didn't loosen that one that much so it locked right into place. I'm going to get this front one. Okay, we'll tighten this one up a little bit. Battery is nice and tight. Connect the positive terminal, pull the cap up here so I can see what I'm doing. Push it down over. 10 millimeter wrench, tighten it up.

Again, be careful you do not ground this out while you're tightening it. It will cause a spark and short the battery out. Let's get it nice and tight. It's on there solid, we'll put the protective cap back on. I've got my key fob ready because as soon as I connect the negative terminal it's going to set off the alarm. It's very common when you disconnect a batter and reconnect it, the factory alarm might go off.

Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Rust Penetrant

  • Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Sockets - Metric

  • 10mm Socket

  • Wrenches - Metric

  • 10mm Wrench


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