Question about 2004 Scion xB

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Need to install the 2 belts on 2005 scion xb.any special tools needed?

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You need 10mm, 12mm and 14mm sockets. Preferably 2 jack stands but 1 will suffice, a jack and tire iron. The 10mm is for the battery, safety first.

Here's a diagram to show you what it looks like from a side view.

Yes that's for an xA but bot the xA and xB are the same, I know because I own an xB and my wife an xA.

Loosen the passenger side front tire, jack the car up, put the stands in place, remove the wheel. You'll have to fiddle with the plastic undercarriage a bit to get to the lower pulley. The purpose of this is there's 2 bolts that need to be loosen to take the power steering belt off (this is serpentine belt 1)
Once you loosen the bolts, simply rotate the pulley and remove the belt from the pulley. I believe both bolts are 14mm, one might be 12mm though.

For the other belt

A 12mm bolt is on the top of the alternator and a 14mm bolt is underneath, it takes some looking to see the one underneath it but simply loosen the top bolt and then loosen the bottom bolt, the alternator will be held into place by the bolts but can now move freely. I say simply loosen the bolts but our engine bays are tiny and if you have larger hands, it will be harder getting the tools in there to loosen anything, I know from experience and engine knicks(to my hand).

Give the alternator a little push towards the windshield to give the belt some slack and remove it then return back underneath and remove the other belt. You can't take off the lower belt without first getting the top one off, they come together at the crank shaft.

Once both belts are off, reinstall the new one underneath for the power steering. Make sure to adjust the pulley to there's enough tension on the belt, but not too much.

If you have a tension gauge for belts, this pdf will show you how much tension to put on the belts.

Once that belt is on and adjusted, put the other belt on and swing the alternator to adjust the tension in that belt, same thing, not too much, not too little. If you don't have a gauge for tension, when it is tightened up, there should be about 5mm of give in the very center of the belt. Tighten the bolts back up and you should be all set. If you feel comfortable, when the car is still on jack stands, start the car up to see if there's any squeaks or squeals, if so then you know the belts are either too loose or too tight, then adjust them properly.

Posted on Aug 20, 2012

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Should be pretty straight forward. I replaced the trans fluid back in Dec. and all I needed was metric wrenches and a bucket. You may want to try sites like and for other issues.
Just remember how the belts wrap around. Ya don't want to reverse the pulley on the alternator, etc.
Good luck

Posted on Jun 29, 2009


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