On my 92 Lexus ls400 the serpentine belt keeps breaking. 2nd time in 3 months?? And also when first started in the morning it has a bad squeal coming from engine cab? Having to add power steering fluid once a year if not twice, is this normal?

Did the belt jump off track or break ?

check belt for damage or wear ---check all pulleys a bearing maybe bad and causing a wobble or not turning --check the tension pulley if no tention belt will be to loose

My first impression would be the serpentine belt is worn ...specifically it has "glazed" and stretched so it no longer has the ability to effectively grip the drive pulleys it spins. Typically when the serpentine belt loses "traction" it will squeal as it slips on the metal pulleys of the accessories it is designed to operate. There also may be a problem with the the tensioner ...a device used to keep proper tension on the serpentine belt. This is an easy and relatively inexpensive repair ...probably cost between $100 and $200 ...depending on whether the tensioner needs replacing.
You really need to get this fixed. If the serpentine belt fails ...it breaks or comes apart ...you will lose power steering and the water pump as the two critical accessories the belt operates. Obviously the loss of power steering can make the car difficult to drive and the loss of the water pump will cause an engine overheat condition fairly quickly. The A/C and alternator will also drop off line but these aren't as critical as the steering and water pump.

I would suspect the belt tensioner is going bad.

it is the belt it is either to tight or not tight enough

Yes it runs the water pump,the car will over heat almost as soon as the belt breaks wile driveing down the road.Thanks for using Fixya.....Ray

Hi Chris. I would check all the pulleys with the belt off and make sure the alternator, ac pump, power steering pump are all turning fairly easy and that the pulleys havent come loose and started wobbleing alittle.

chris....
ur problome will fixed if u change both the belt and the tensiner

Is this a single serpentine belt system or a V belt with 2 or more belts running the accessories? There is an alignment issue, another bad accessorie or bad bearing (quite possibley the new alt) or as mentioned a bad idler ( if a serpentine belt setup)